Jump to content


  • Content Count

  • Joined

  • Last visited

  • Days Won


JBNeal last won the day on February 15

JBNeal had the most liked content!

About JBNeal

  • Rank
    Unleaded Contributor

Profile Information

  • Gender
  • Location
  • My Project Cars
    see signature

Contact Methods

  • Biography
    [edited for content]
  • Occupation
    Mechanical Engineer


  • Location
  • Interests
    [edited for content]

Recent Profile Visitors

6,195 profile views
  1. After 10 days of no incidents, I had 2 consecutive days where the ABS warning light came on: once in stop'n'go traffic, the other while backing downgrade. The light would shut off after parking the truck for a few minutes then starting back up for another errand run. With all of my blahblahblah I forgot to mention something that I noticed that I had not read about anywhere. Whenever my ABS warning light would come on, there would be brake fluid on the inside of the rubber cap on the proportional valve. When I had my original sticking calipers, this rubber cap would have brake fluid seeping out from the cap, running down the prop.valve. When I replaced my originals with defective replacements, there was fluid all under the cap but no longer running down the valve. And with these better performing calipers, the cap stayed dry until the ABS light came on, but only left a dot of brake fluid on the cap. My guess was that the hydroboost drawing back on the master cylinder causes fluid flow to escape through the prop.valve relief port when the port cracks open due to the calipers retracting too slow. My belief is that these new functioning calipers need the new to wear off of them before they operate smoothly enough to not cause this pressure spike at the prop.valve. Stay tuned...
  2. additional information - Radiator Identification
  3. I've had a few flatheads with odd markings that I couldn't explain because they measured as standard...but I agree, this engine may be salvageable but I wouldn't qualify it as an easy rebuild, the block etc definitely need teardown and thorough inspection...
  4. NAPA online has had issues for years since they "fixed" it back in 2012 or so, to be more "user-friendly"...this may or may not help: https://www.napacanada.com/en/p/NHGM79308
  5. I've used IR thermometer to identify hotspots, temperature spikes etc...if the body of the generator is 100°F after 30 minutes of operation, but the bearing area is 200°, then ya got something to inspect...same goes for the VR, wiring, engine head, engine block, radiator, etc... I've used IR thermometer to identify malfunctioning relays in an automated hardwood kiln operation...going through their control system, we were able to identify faulty yet functioning components, measure amp draws before and after component replacement, and show that energy saved paid for the replacements in less than a year...on another project, I found a faulty splice in a circuit that was acting like a choke and causing the control system to react adversely to actual conditions, causing all kinds of problems... I suggest taking that buggy out for a half-hour or so test drive, then back at base with engine idling, take IR thermometer readings of mechanical parts of generator, then electro-mechanical parts as suggested, then follow the charging circuit to the VR and battery, etc...don't forget your fire extinguisher for the test drive tho
  6. what do your infrared thermometer results look like...?
  7. I've been monkeying around with old machines since the 80s and have noticed that prices vary with the strength of the economy. Prices were rising in the 90s, fluctuated 2000-03, were on the rise for awhile, tanked in '08, and started to take off in '13...ppl want top dollar if they can get one buyer to cough up the moolah...I opted to sell The Blue Bomber by asking top dollar to keep away the tire kickers, had a 3-way bidding war going with guys from Dallas, FtWorth and Houston, ended up getting about what I wanted for it which was double the trade-in value locally...conversely, I've been approached for years by guys who want to give me less than scrap value for trucks in the yard that are complete and with title...eBay is still riddled with crackpots so caveat emptor, ya never know how flakey ppl are until $$$ is involved
  8. With everything adjusted, my brake pedal would only go about halfway to the floorboards, maybe a little more if I stood on it...I'd suggest a stop fab'd for the back of the brake pedal, but you're right about the need to floor a brake pedal means bigger problems are afoot...
  9. I vote for a high-side bed as it looks less like a Chevrolet...fwiw the best thing about a pile of parts used for a build is no knuckle-busting needed to disassemble 1st, ya only have to clean'm up and slap'm together
  10. 2019 was a very challenging year, in many ways. One of the most exasperating issues I had to deal with was the brakes on the QuadCab. A random ABS warning light was first noticed while borrowing this truck for a few weeks in 2015, but once I started driving the truck regularly in late 2018, the ABS light became more frequent and longer lasting. The truck passed the annual safety inspection in February as the ABS light did not come on during road testing, but by late March, the ABS light became a daily occurrence. It was about this time that a heavy trailer was pulled that required setting the trailer brake controller, and while pulling this trailer through stop-n-go traffic, a delayed release in trailer brakes was felt in the truck and observed on the controller. In April, the original master cylinder began leaking internally, and its defective replacement started an almost weekly trip to local parts stores, dealing with even more defective remanufactured parts. Replacement Remanufactured Component Defects Observed Master Cylinder: Original unit began leaking internally at 200k. OR replacement unit had a spongy pedal that could not be corrected after 20 bleeding attempts over 4 weeks and was replaced under warranty. HydroBoost: Original unit began leaking PS fluid into cab at 170k; OR replacement worked up to about 200k. OR units 2-6 would fail pressure test after bleeding, causing brake pedal to not spring back after being released. AA replacement delivered was wrong application; followup delivered replacement had Schrader valve installed to psi canister and was returned. AZ unit lasted for 4 months with gradually degrading performance until ultimately failing by not releasing brakes after hard braking, hissing loudly under dash, then releasing brakes. Pedal return travel would take 3-10 seconds; ABS warning light would illuminate. NAPA replacement worked immediately, and in sub-freezing weather. Steering Gearboxes: Original unit began having choppy operation around 204k. AA replacement had a mounting lug that stripped on final torque. Replacement unit delivered had damaged input shaft and was returned. Followup replacement unit delivered had damaged output shaft seal and was returned. Second followup replacement unit delivered had slightly damaged output shaft that was corrected with careful filing. Front Calipers: Original RF caliper not retracting fully, LF dragging at 206k. AA replacement units had loose bushings; NAPA LF replacement worked; RF replacement leaked at bleeder screw and was replaced under warranty. Rear Calipers: Original calipers dragging at 206k. AA (2), OR (2) & AZ (4) replacement units had very loose bushings; AA RR casting cracked at bleeder screw; OR RR casting leaked at hose; NAPA RR replacement leaked at bleeder screw and was replaced under warranty. Remanufactured Caliper Failure Summary The BR-series 2500 HD brake calipers are a floating caliper design, with bushings bolted to the caliper adapter that is bolted to the spindles up front and Dana 80 axle in the rear. The caliper has a rubber boot that encapsulates the bushing, requiring a rubber-compatible lubricant to be applied inside the boot and onto the bushing mounting bolts. This style of 4-wheel disc brake system was used from late 1998 through early 2004; subsequent brake systems grew in size to match growing rim sizes. Earlier disc/drum combination systems used similar components, but certain components (such as hydroboost, prop.valve, and ABS HCU) are not really compatible. Remanufactured calipers varied in quality, with evidence of pitting and scarring on pistons. Advance Auto and O’Reilly calipers were packaged in the same box, with the only difference in labeling of Wearever and Brake Best. AutoZone calipers (with and without brackets) were packaged slightly different, but of similar quality. None of these castings had any coatings, so clean grey castings at the store quickly rusted in the humid TX air. Bushings were visibly wobbly in their bores, suggesting that the castings had too much material removed during core cleanup. This could lead to the caliper not aligning properly on the bracket, causing a ratcheting action during brake release. Similarly, excessive boring could be causing pistons to wedge themselves in their bores during brake release. This was somewhat confirmed during caliper removal after road testing, when pistons were difficult to compress in their bores, then suddenly compressed smoothly. The cumulative effect was rear brakes that would not release after braking downhill in reverse without having to throttle-rock the truck. Also, an ABS warning light would illuminate when one of the sticking pistons would fully release at random times (sometimes while flying down the highway), causing a pressure spike at the ABS pressure sensor in the proportioning valve. By contrast, NAPA bracketed calipers had much cleaner, blemish-free pistons, and the bushings moved smoothly in their bores with practically no play observed. Castings had been painted black, so they would not rust right away like the unpainted Advance Auto, O’Reilly and AutoZone units. Cost was about 10% more than the competitors’ defective units that were all returned under warranty. NAPA calipers were not perfect, however, as a RF and a RR caliper were found to be seeping at the bleeder screws. Replacement units ordered seemed to be working as required. The irony here is that all units were found to be remanufactured by Cardone. The NAPA units had documentation from Cardone, whereas the associates at the other stores said that the units were rebuilt by Cardone and information on the internet seemed to confirm this. I did not attempt to measure any IDs or ODs as I had no specifications to measure against and I was trying to make repairs quickly as this was the only vehicle I had available for 2019. With the exception of the 4 caliper castings that leaked, all calipers worked well during brake application but not during brake release. Since the brakes need to be cycled rapidly for the ABS to work, the poor brake release would register as a pressure fluctuation outside of accepted parameters and set a fault code in the ABS module, which would cause the random ABS warning light. This failure mode is not directly outlined in the factory shop manual, but several symptoms of poor brake release are outlined as failure modes of other components, such as the ABS wheel sensors, the HydroBoost assembly, brake hoses, even the power steering pump and hoses. Root Cause Analysis This truck was driven and maintained regularly for its first 150k miles, then effectively parked in a barn for 10 years, driven occasionally to perform short-trip chores. Even though the brake system still functioned as needed, the gradual performance degradation went unnoticed as the truck was driven so infrequently and still passed annual safety inspections. But the random ABS warning light that started in 2015 became a daily occurrence as the truck began being driven daily in 2019. Each month, a new symptom would crop up, and consulting the FSM would yield a different repair for each symptom. As more original components had been replaced, I noticed a paragraph in the FSM that covered quality of brake fluid in the ABS. Aging brake fluid begins to break down rubber components in the ABS, turning the brake fluid practically black as the rubber debris saturates the fluid. This causes brake hoses to weaken and seals to break down. The FSM recommends replacement of ALL components that have any rubber when the system becomes contaminated, which is everything in the brake system except the hard lines and ABS control module. Reviewing this truck’s service records, the brake fluid had not been flushed in over 10 years, so that old dark brake fluid finally caused the whole brake system to bite the dust. Total brake overhaul time probably should take less than 40 hours, but chasing phantom symptoms and dealing with defective parts caused me to spend 155 hours overhauling the system. Countless hours of research were spent trying to solve this random ABS warning light problem by studying the FSM and doing research online, as well as all of the time spent dealing with defect returns. Back on Track After months of second-guessing and setbacks, gallons of brake fluid and power steering fluid (bought 32 ounces at a time), 3 ruined tires, 3 mildly flat-spotted tires, and way too much time spent reading about similar (but not the same) problems on various Dodge Ram 2nd Gen online forums, I finally got the brakes to function as they should, without leaks and with a firm and responsive brake pedal. This work was completed during unseasonal near-80° February weather, the day before a sub-freezing cold snap blew into the area. Test driving in the cold weather showed the brake pedal returned just as fast as it did in balmy weather. I could even tap the brake pedal rapidly to make the brake lights flash to alert following drivers, something I had not been able to do for years, which I had just chalked up to “oh it’s an old truck, it just doesn’t work that way I guess”. So the next day, I headed to the inspection station and the truck passed…a HUGE relief… I learned that aging ABS components have to be kept in tip-top shape in order to work properly. Just because the brakes “work” doesn’t mean they are working as they should…hence the random ABS warning light. Flushing the brake fluid periodically is paramount; deferring this maintenance can be an expensive headache in the long run. But above all, knowing how systems work can help determine what problems need to be addressed, especially if defective replacement parts are thrown into the mix. This requires patience and perseverance, much the same as with a decades-old buggy. As I told several of the auto parts store associates, I’m accustomed to ordering stuff and waiting a few days before I can do the repair…each different associate would look at me with some surprise at my statement, apparently patience is something they don’t see much these days in our everything-is-on-my-smart-phone society. Another issue of note is brake caliper lubrication. Sil-Glyde is a silicone lubricant that is recommended for all brake components, including the rubber boots that encase the slide pin bushings. Permatex Disc Brake Lubricant specifically mentions that it is only to be used on metal-to-metal applications. Internet research found that several other disc brake lubricants that did not specify if they could be used on rubber components would actually cause rubber to swell, causing binding of the caliper on the slide pins. Oddly enough, Permatex and Raybestos training videos do not mention this issue, but Wagner does differentiate between metal-to-metal and metal-to-rubber lubricants. Following their instructions, the NAPA caliper bushings were lubricated, as well as the brackets for the spring clips, the contact points of the brake pads to the spring clips, and the brake pad back plates where they contacted the calipers. Most of these areas see very little movement, if any, but presumably the lubricant is to displace moisture to reduce metal oxidation at contact points, which degrades brake performance over time. I do not think I could have tackled this complicated brake problem on a truck that is 6 years shy from being classified as a Classic by TX DMV if I had not run into similar hard-to-diagnose problems on much older machines. As with most multi-component systems, each component has a certain operating envelope it can function within for the system to be robust. When multiple components operate outside their respective envelopes, diagnosing the problem area can be difficult as the phantom symptoms produced confuse the issue. The toughest issue to deal with was the defective remanufactured parts, as reman’d parts seemed to be the best available cost-effective means to deal with the declining brake performance. When buying these reman’d parts, the assumption is that they have been sold as meeting specifications required. Since these specifications are not available to the general public, trial-and-error was used to determine which parts were actually as advertised. And even then, it is assumed that this will be sufficient as the system is operating apparently as required, but not known entirely for sure if it is or not. So I reckon if that barn find has been parked for 10 years or 50 years, ya need to check them brakes and plan on just changing everything out, maybe even the hard lines…otherwise, you’re gonna spend a TON of time chasing down problems piecemeal and spend a fortune doing it…ain’t nobody got time for that
  11. I've only seen one Pilot-House in a museum, but this private museum is now closed. It was a nice truck, but I was distracted by its non-originality...there was a Tucker Torpedo 50 feet away, which was a sight to behold
  12. If you're trying to burn out the gunk in the crankcase filter cap on that big truck, I think ya got a little carried away 👀
  13. I've been pondering the rear axle change for years, and from what I've read from various sources, the Dodge Truck flathead torque curve delivers the best balance of pulling power and highway speeds with a 3.73 rear axle ratio on transmissions with a 1:1 top gear. The 4.1 does well in all transmission gears at speeds up to 55mph, beyond that is pushing your luck...3.55 does very well at cruising 55-70, but seems gutless at lower speeds. Originally, these rear axle ratios were engineered as part of the powertrain to maximize torque throughout the transmission range, so engine-transmission-axle configurations vary with torque curves and gear ratios...what may fit on the chassis may or may not deliver the best performance
  14. Just my 2 cents: I've seen overhead valve covers with sheet metal baffles to keep oil from seeping out of oil fill caps and to keep oil mist from getting sucked into PCV plumbing and ultimately the charged air flow...perhaps there was a sheet metal baffle added to keep oil from seeping out of the flathead valve covers as they notoriously do, with the baffles riding on the valve cover bolts and restrained from interfering with the valve area by those clips...these baffles would be in the way during valve adjustments and could be left on the work bench when the truck left the shop...
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Terms of Use