Thread: first run after rebuild

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Originally Posted by Tommie

One thing though; with a noise like that, there's bound to be something visible to the eye, right? I mean, the noise was mechanical, so something must have been bouncing around (figuratively speaking, I hope!!), so there should be marks where the failure occurred, right.

NO not unless you disassemle the motor to see.

Originally Posted by shawnlee28

NO not unless you disassemle the motor to see.

that's what i meant...after taking the pan off...either bolts, nuts, crank, rod or bearing should show visibly to have taken punishment, right?

Originally Posted by Tommie

that's what i meant...after taking the pan off...either bolts, nuts, crank, rod or bearing should show visibly to have taken punishment, right?

After you take the mains off and rod caps off ,all the wear damage /noise is inbetween those ,not on the outside.Unless you diassemble those parts not visually inspect the outer surface,better do like TECH said and check the math on compression first,spark knock ,ping will sound just like a diesel motor.rods and main bearings have more of a dull thud knock sound ,than a diesel ping clatter sound. Can you take a sound clip or vid clip with sound?Alot of the guys here, will be able to tell real fast what it is,or atleast narrow it down more quickly.

If you have had the engine running for a while you may see metal in the oil upon draining. Look for those tell tail greyish silver streaks or maybe some very small metal fragments in the drain pan. A magnet is very helpful here if you have one. Run your magnet around in the pan to see if it picks up anything. Moly prelube from the cam can look like metal in the oil so the magnet will confirm it. Unless you have a catastrophic failure such as a broken rod bolt you won't see any damage until you disassemble the entire engine and look at the bearings. Hope this help!

Also cant you look at the spark plugs for little metal fragments,with a magnifier glass and see the rusults of detonation,or does that take miles and miles ?

Originally Posted by shawnlee28

Also cant you look at the spark plugs for little metal fragments,with a magnifier glass and see the rusults of detonation,or does that take miles and miles ?

You won't see that until the pistons begin to disassemble themselves and he may not have run the motor hard enough to get there yet.

well...and the winner is...

the scraper!

I mean...REALLY!...damn!...talk about Incorrect fit!

http://www.clubhotrod.com/photopost/...cat=2&size=big

http://www.clubhotrod.com/photopost/...cat=2&size=big

http://www.clubhotrod.com/photopost/...cat=2&size=big

I hoped to find something obvious, but...this...
well...I'm lucky that, besides leaving some scratchmarks on the counterweights, there wasn't any other damage done to the bottom-end, because, seeing this, I realise it could have ended much worse!

The other thing I found...a little bit of water in the oilpan, mmm...it looks like it came inside through the distributer shaft...
I'm having a closer look into that this week.
grtz,
Tom