dodgefreak73

Thanks but I have already been there and had no luck with the numbers on this engine! I'm guessing it's going to be next to impossible to figure out the date stamping on this due to it being Canadian! All the decoder's and Flathead sites are American and don't decode the Canadian stuff! Oh well I guess I'll go ahead and buy this engine and hope for the best, if it doesn't work I'll have an expensive paper weight.. Lol

I'm still trying to figure out these numbers and am hoping someone might be able to help decipher them so I know what year engine I'm looking at. I just mainly want to be sure there won't be any fitment issues with parts like the flywheel, transmission, etc. I'm pretty sure there won't be any issues with the mounts just not sure about the crankshaft as mine is a 3 spd manual transmission and this engine has the fluid drive automatic bell-housing assembly on it currently. Thanks in advance

The pistons are stamped .030 over the bore was approx 3.465" (which makes sense if std bore is 3.4375" and this is .030 over) the stroke was 4.5" which all indicates that this is a 251ci. I still can not figure out the year of this one or what it may be out of, not that any of that really matters as long as there are no fitment issues due to the different year. Any help would be greatly appreciated! Thank you!

Looking for some help to decipher and ID a 25" flathead engine I'm looking at. I do know this is a Canadian engine and am being told by the seller that it is a 1960 251ci but I'd like to confirm the year of this engine. I am almost certain that it is a 251ci as when I looked at the engine we pulled the head and the measurements match those of a 251. The numbers are as follows ID stamp pad P6D1 - 33657C Block casting/part number 1402529 Block date stamp E 19 0 and the number arrow is pointing at the #8 Head casting/part number 1632389 Head date stamp D 11 0 I have tried multiple web searches to try to decipher this but there doesn't seem to be much out there on the Canadian number on these things. This engine is a rebuilt with very low mile on it since the rebuild, it is in really good shape and complete ready to drop in with a very reasonable price. The engine did come out of a car and has the fluid drive bell-housing with the coupler/convertor and clutch as well as a Pertronics 12V ignition system (I don't know if I will actually use this ignition as the points have been very dependable but it comes with the engine). The deal seem way too good to pass up and will be a much less expensive fix for the sick flathead in my Fargo. Any help would be greatly appreciated! I'm not going for a concourse resto so the year of the engine doesn't make a huge difference (plus I plan to keep the one currently in the truck which is the original engine to the truck) this more for my own piece of mind and knowledge.

I haven't had a chance to investigate any further on my engine yet, but I did find another complete enigine that I can get! The problem with this other engine is I'm being told that it is a 251ci (it was rebuilt within the past few years), that it was in a car but the seller claims he checked the stamp numbers and that it is a 1960 truck engine. The concern I have is that any info I can find about the numbers the truck engine stamp starts with "T" though most of what I can find is for USA built and I know some stuff was done differently here in Canada. I know the original engine in my Fargo is stamped with a "T" but then I also have found information suggesting that 1958-60 were stamped differently again so I'm getting confused. This engine does appear pretty fresh and the price is very reasonable but I don't want to buy it if it's not a 251ci! I know that if it did come out of a car I'll likely have to change the oil pan and exhaust manifold which is no big deal, I just don't want to spend the money if it isn't correct. The block stamp is P1D1 - 33657C I'm hoping someone here can shed some light on what this engine really is before I decide. The deal is too good to pass up if it is what I need but don't want get a boat anchor smaller cube engine. Thanks in advance

So I still haven't confirmed anything for sure on my smoke issue, though I did finally get a chance to do a compression test today. I don't have the luxury of keeping my truck at home as I live in an apartment so needless to say I don't to work on it as often as I'd like to. I did the compression test both Dry and Wet and did find cylinder number 3 is a bit low but had very little change by adding oil to the cylinder. I believe this should rule out any issue with the compression rings though it still wouldn't rule out an oil ring problem, though if I'm not mistaken a bad oil ring should cause smoke at all times not just coming off of idle like mine is doing but I could be wrong. My mechanical knowledge is very good but not so much when it comes to internal engine problems unless it's something very obvious. The compression test results are as follows: DRY #1 - 95, #2 - 100, #3 -70, #4 - 90, #5 - 95, #6 - 100 WET #1 - 100, #2 - 105, #3 - 75, #4 - 90, #5 - 110, #6 - 110 Hopefully someone can give some direction as to the next step prior to a tear down. This engine has been rebuilt at some point in it's life though I have no idea how long ago, but based on these numbers it looks like it would've been a long time ago. I say that it's been rebuilt as the pistons are stamped made in England and are 30 Thou oversize neither of which looks like something that would be factory original for when the truck was built, but I could be wrong. The engine running very smooth and quite so I have a hard time thinking it would be anything related to the valves, not saying there might not be an issue there but it does run very smooth which if it had bent a valve I would think it would be running a little rougher than it is. Thanks in advance for any help with this

Thanks! I will check all of these suggestions as all sound possible! It hit some really high rpms even though it was only a short period of time it has obviously done some kind of damage. It is very frustrating as it has always worked so well and we have driven the truck over 2000 miles and never an issue until this happened. I guess it's just one of those freak things, but unfortunately it looks like it might turn into an expensive fix. Thanks agian

I'm looking for some advice/suggestions on my 251ci flathead. The truck is a 1957 Fargo and it has been running great since putting it on the road over a year ago but has just recently started having issues. About 3 weeks ago while on my way home from a cruise night the throttle linkage fell off the carb causing the engine to go to full throttle very high rpms, I tried to shut it down as soon as it happened but it still revved for probably 15 seconds or so. I got it coasted off the road and found that the clip/pin had fallen out of the linkage, I was able to make shift a pin to get me home that night. The problem now is that the engine is puffing blue smoke (oil) when accelerating though it doesn't seem to smoke at steady higher rpm (ie: if I rev the engine manually from under the hood it smokes every time if I "crack" the throttle, but if I take the rpms up above idle and maintain it manually it doesn't seem to smoke, I have had someone stand at the tailpipe to watch for the smoke). The engine still runs great other than the smoke, I am not sure where to start as with my knowledge I would think if it was rings it should be smoking typically at all speeds, the smoke when "cracking" the throttle would typically point toward valve seals on an overhead valve engine but I know the flatheads are a different setup and don't use seals. So am I looking at possibly a broken ring, a bad valve guide or ?? This smoking issue was not there prior to the throttle sticking open! I thought at first that maybe it had sucked some oil in from the oil bath air cleaner but it still hasn't cleared out so I'm doubting that is the case. I hope someone on here has more experience with these engines than I do (which isn't much, lol). I have not yet done a compression test though it hasn't changed in the overall performance of the the engine power wise just smoking. Thanks in advance

Thanks to all for the warm welcome to the site!

I'm liking this group so far and have been browsing for a while now and finally decided to join. My Wife and I own a 1957 Fargo D100! We have owned it for 3 years and finally got it on the road just 2 months ago. It had sat in a barn for almost 30 years before we got it so it didn't run and needed a fair bit of TLC. All of the work was done by myself and done with a pretty tight budget, I tried to keep things as original as possible and left the body as found. It has the original Flathead 6 (250ci) engine, 3 on the tree trans, and manual steering and brakes. The truck was gone through mechanically from one end to the other to make it road worthy and safe. So far in the couple of months we've had it on the road we've managed to put about 700 miles on the truck with very few issues. I love driving this truck!