Mark D Posted February 21, 2012 Report Posted February 21, 2012 My new exhaust arrives this week and I plan to make the transplant this weekend. I mail ordered the new system (aluminized steel front pipe, tail pipe & muffler) from Classic Car Exhaust in PA. Was under the car last night checking hangers etc., all seems ok and acceptable for reuse except I am going to need a couple new bolt/nut assemblies to connect the front pipe to the exhaust manifold, and I dont think these ship with the new exhaust. Photo attached shows same soaking in penetrating oil... I did not install the prior system and it appears that the bolts (whats left of them) are rusted in place. I'm guessing these are going to break or have to be cut off. Question is what should I put in its place? Was thinking of grabbing a couple of stainless assemblies (bolt/center lock nut). Any one know the size off hand? Quote
Guest P15-D24 Posted February 21, 2012 Report Posted February 21, 2012 Just took mine off my B1 after 6 years in service. Quote
Young Ed Posted February 21, 2012 Report Posted February 21, 2012 Cut the old ones off I wouldn't even bother trying to save them. And then I'd go buy the same thing over again. You want them to rust in place so they don't fall apart. If you do stainless what will keep it from loosening? The heat will ruin the tension of a lock washer. You might be able to do a stainless combo if you can find a stainless steel jam nut....... Quote
greg g Posted February 21, 2012 Report Posted February 21, 2012 Regular Hardware stuff will work, but as mentioned a brass nut will make the job easier for the next owner.... Although my stuff has been on there for 10 years and isn't showing much corrosion yet. Quote
captden29 Posted February 21, 2012 Report Posted February 21, 2012 My48, i use stainless with a lock washer. i just took mine apart to install a new system and it was still tight and came apart easy. re-used the same bolts and washers. i guess young ed has had them come loose on him and i will check mine before i use the car again. never thought about the stainless lock washers, or any lock washer would lose tension from heat. i had to have my tailpipe cut into two pieces to install as i could not fit it in with the car just up on blocks. i could have done it in one piece but would have had to remove shock, and i decided to just leave it alone as it has been in a long time and may have been too difficult. why make a job harder? capt den Quote
Don Coatney Posted February 21, 2012 Report Posted February 21, 2012 If you have doubts on what to use stop by your local muffler shop and ask them. Most likely they will sell you what they recommend. Quote
Mark D Posted February 21, 2012 Author Report Posted February 21, 2012 For the suggestions, and it just dawned on me I think I'm going need a gasket as well. It's not on the parts list from the supplier in PA, so I'll stop my muffler shop first and worst case grab everything at NAPA while I'm there. These look like 5/16" to me anyone got a parts book handy? Quote
Rusty O'Toole Posted February 21, 2012 Report Posted February 21, 2012 When I worked in a garage we used to cut off the old bolts or break them off and put in new mild steel bolts, regular hardware store quality. They will rust up too eventually but who cares, just cut them off next time you need to replace the exhaust. This is a lot easier than messing with studs and nuts. Quote
TodFitch Posted February 21, 2012 Report Posted February 21, 2012 For the suggestions, and it just dawned on me I think I'm going need a gasket as well. It's not on the parts list from the supplier in PA, so I'll stop my muffler shop first and worst case grab everything at NAPA while I'm there. These look like 5/16" to me anyone got a parts book handy? You exhaust manifold looks a lot like mine. I use a NAPA FPG 8105 for the "Exhaust pipe flange gasket". On the other hand dimensions might be different even if the look is the same. Maybe you should see: www.ply33.com/Parts/group11#11-06-08 Quote
Andydodge Posted February 21, 2012 Report Posted February 21, 2012 I use stainless bolts, brass nuts & never seize on the threads, don't come undone and can be undone when you want it.......andyd Quote
1940plymouth Posted February 21, 2012 Report Posted February 21, 2012 The Napa gasket I used is Fel-Pro 60146 Quote
Mark D Posted March 2, 2012 Author Report Posted March 2, 2012 Thanks Gents - Completed the transplant night before last. Removing the bolts that held the front pipe to the manifold was the hardest part and quite frankly took the longest. I ended up sourcing the gasket from the local muffler shop, and got the clamps at the local auto parts store. The front pipe exhaust stem that fits into the manifold needed a little "forming" with a hammer before it would slip into place, but that was about it for obstacles. I ended up getting replacement SS bolt/but assemblies from the local hardware store, a $6- investment. Here's a video of the running results. I think it sounds pretty good. Much throatier than I anticipated for a "stock" exhaust setup. Sorry about the dark video, it was late when I finished up. Quote
TodFitch Posted March 2, 2012 Report Posted March 2, 2012 ... I think it sounds pretty good. Much throatier than I anticipated for a "stock" exhaust setup... Sound about the same as the "stock" setup for my '33 that I got from Keplich. If/when it ever needs replacing I think I will go with a non-stock setup that is quieter. Quote
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