Hi people.
We got a gazzilion hours on this car and we're only 10% done :)
Big question, with explanation= Took the engine appart because it had zero compression. Once it was appart we found the valves were toast. (no problem)
Done the valves and we noticed the cylinder walls were like new (no scores, no ridge etc.) someone did the engine at some time before we got the car and put 60 over pistons in.
Now, after measuring etc. it says we are supposed to have.0015 clearance. Well, we have almost an ieghth of an inch. Ok it ran before so I figure we get a new set of rings right?
Good luck with that they are supposed to be 60 over and can't get them any where in the universe (that i know of).
Ok enough of the BS heres the question. I'm thinkin put the thing back together the way it was. Am I looking for big trouble?? I thought maybe some of you Pl 29 gurrus could answer that.
BTW still no luck on wood roof measurements but the rest is going good (I think)
Cheers and thanks all for this great site
Respect,
Emery
My 2 cents which is probably worth less:
I am puzzled by the statement about clearance being .0015 and your measurement of an 1/8 of an inch. An 1/8 would be .125" ??
Anyway, you could put the head back on and do a compression test. If you have equal compression across the cylinders the engine should run. Using the starter motor these engines don't pump up a lot of lbs and I think 60 or over super, 40 would work just fine. I think mine is around 40. I don't know what result you are looking for ? The valve job might be all you need to get up and running.
Chet...
Thanks Chet,
Yeah with the primary compression ring inside the cylinder there is 1/8" =.125 gap there should only be 15 thou!
The engine looks good inside so I'm going to lightly hone it and put it back together with the old rings. (cause I can't get any 60 over)
I will send pictures at a later date so all can share.
Also I had to make the front motor mount (both Plates ) and used eurethane. should work.
Thanks for this site.
Regards,
Emery
Then and now Automotive will revulcanize those front motor mounts for a very reasonable cost.
http://www.maritimedragracing.com/then_and_now_automotive.htm
For the rings try Egge Machine
See link to post on this website:
http://www.1948plymouth.info/28Q29U/index.php?topic=253.0
Good luck, Chet...
It amazes me that the engine will run at all for very long if at all with that gap. Something dosent sound right
If the pistons are of the original type, Hastings and Grant both carry them in over sizes. +.060 should not be a problem.
You can get them through Egge. Or, sometimes Hastings will sell them directly. Should run you about $150 for a set. That's higher than the modern thinner rings cost. But, a good correct set of rings is well worth it.
Egge can be reache at: 866-966-3443
Well people, the engine has been put back together.
New gaskets came in finally.
Lightly honed and with the old rings, lots of compression.
Hav'nt tried starting her yet but will let you all know down the road.
Cheers