Well the engine is down to nothing.. I just thought a quick rebuild wouldn't be that bad of a idea.. Curious to as why the engine wouldn't last long with new rings, bearings, bolts, etc.
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03-15-2012
Well the engine is down to nothing.. I just thought a quick rebuild wouldn't be that bad of a idea.. Curious to as why the engine wouldn't last long with new rings, bearings, bolts, etc.
03-15-2012
read this page. Precision Align Bore and Cylinder Honing By Eddies Performance:Eddies Performance Motors-High Performance Engines, Crate Engine, Racing Engine Builder, Rebuilt Motor: these engines dont like to be played with bottom end wise unless you go the full route. the site here calls a back yard rebuild a 200 mile motor.
the most common recommendation here when someone spins a bearing is to find a good short block, its cheeper than a rebuild and will last for many miles to come.
03-15-2012
I understand if it spun a bearing that it would be trashed. I guess i'll have to do some more research.
I know it seems everyone thinks because a bolt has a spec of x plus x degrees that its torque to yield when in fact most of the bolts that have those specs in engines aren't even close to their yield/stretch torque.
I guess i'll ask the machine shop that's doing the heads what he thinks.
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03-15-2012
its one of those things with these engines, i know anyone with a like a 350 sbc would not think twice about popping open the caps and plasti gauging them all, these bottom ends don't like to even be opened and closed again.
if it works its just best to leave it be.
03-15-2012
I replaced my rod bearings in September and my car is running great! About 1000 miles on them now.
04 Impala SS Indy:
03-15-2012
What bolts did you use??Originally Posted by Swiggles
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03-15-2012
did you have a spun bearing or just freshened it up?
im guessing you have built engines in the past and got to all line up right, the right tools and know how go a long way.
im just saying that rebuilding a bottom end for no other reason than to just do it, is probably a bad idea.
03-16-2012
I think it was Reptile that explained it to me. Something about the caps etc distorts when you pull them apart, therefore they require all the work etc.
Great engines when they are together, they don't like to be disassembled and put back together w/o the full boat of machining.
Yes...I'm a proud member of the 200 mile motor club.
Also FWIW our rings seal well w/o wearing much. At 186K I still had cross hatches in the cylinders and the rings were in such good shape we could have reused them as new.
03-16-2012
Well I asked the guy that's been doing my machine work for years and he said that out if the 100+ 3800's that he's done, only one required the mains to be align bored.
The old deal with rods needing to be resized on the big end after new bolts was because the old bolts were pressed in.. As far as installing main studs the block captures and centers the mains on dowels... going from bolts to studs does nothing. I'll measure everything but I'm guessing i'll have no troubles..
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03-16-2012
I was do the is3 and heads and did it to freshen up. We reused the stock bolts. They were put in by someone has rebuilt many engines of all differnt makes.
Oh and I'm in the 200k club too
04 Impala SS Indy:
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