blowed up 383 update
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
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From: pr, frederick md.
blowed up 383 update
last time, i discovered the dist. gear had disintigrated. msd replaced the whole dist for free, and im half way into the engine.
so far no broken parts but im pulling the heads tonight. saving the best for last, the oil pan with all the gear shards is next.
so far no broken parts but im pulling the heads tonight. saving the best for last, the oil pan with all the gear shards is next.
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California
Have you drained the oil yet?? If you have not, I would get yourself some cheesecloth, fold it over a couple times to make a good filtering mesh, and drain your oil through it.. Thing is, if that metal broke down to a point where any of it could go through the oil galleys in the engine, you could find yourself dealing with cam and lifter damage. I had a cam lobe go on my 383. I drained the oil, cahnged the cam and lifters, drained the fresh oil after about 5 mins of run time, and replaced the filter. Short time later, took out another cam lobe.. If you have metal loose in the motor, it gets into those galleys. I ended up tearing the whole engine down and hot tanking the block to finally get rid of the gremlin. The residue on the cheesecloth will at least give you a clue if you have small particulate metal in there now...
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California
Unfortunately no. Chevy has a built in bypass at the filter element. When you spin off the filter you can see it. Looks like a silver button. It is spring loaded. As the engine is running, oil goes through the filter AND through the bypass. So, really your filter is not filtering 100% of the oil volume all the time. It is a cumulative thing. You may have got "lucky" when the gear broke if it shattered into relatively large pieces without leaving the small particulate matter. In that case, the oil pump pickup screen would stop everything in the pan..
Le Mans Master
Joined: Apr 2007
Posts: 7,353
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From: Graceland in a Not Correctly Restored Stingray
I'm very interested to know what the cam's dist drive gear looks like.
On the photo thing, once you've uploaded your pix to somewhere like http://photobucket.com/ you may need to temporarily allow scripted windows and re-click the "Insert Image" icon to be able to post them. Hope that helps.
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
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From: pr, frederick md.
Unfortunately no. Chevy has a built in bypass at the filter element. When you spin off the filter you can see it. Looks like a silver button. It is spring loaded. As the engine is running, oil goes through the filter AND through the bypass. So, really your filter is not filtering 100% of the oil volume all the time. It is a cumulative thing. You may have got "lucky" when the gear broke if it shattered into relatively large pieces without leaving the small particulate matter. In that case, the oil pump pickup screen would stop everything in the pan..
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Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
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From: pr, frederick md.
well tonight i finnally pulled the heads and wow!! no damage and everything looks almost like new! so when the dist went and it sounded like a canon, it didnt hurt anything. still gotta pull the cam and pan. wish me luck.
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California
Do you really think that a clean oil filter passes 100% of the oil pumps pressure and volume through it without some of it going through the bypass?? Interesting.
Instructor
Joined: Jul 2006
Posts: 112
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From: vt
the best thing to do is to eliminate the bypass. you can simply unbolt the piece that the filter threads onto from the block, pop off the bypass valve/spring, tap the bypass hole, and put in a threaded plug - being sure to use loctite, bolt the threaded fitting back onto the block, and you're good to go. do that, and you're guaranteed that 100% of your oil will go through the filter every time. just make sure to use a good racing filter, not one of those cheap ones that doesn't flow well.
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California
Thread Starter
Melting Slicks
Joined: Dec 2004
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From: pr, frederick md.
[QUOTE=GDaina;1560634338]pulling the heads won't show any damage, pulling the pan and some bearing caps will.[/QUO
i was more concered with a valve hitting a piston when the dist. cut loose but i will pull some caps and the pan has to come off to get the dist. gear shards
i was more concered with a valve hitting a piston when the dist. cut loose but i will pull some caps and the pan has to come off to get the dist. gear shards
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California
[QUOTE=redc3;1560644858]The cam drives the dist, not the other way around. Dist geear going won't affect valve events at all.
yea i know but this thing went boom bigtime, and im just checking evrything
Burning Brakes
Joined: May 2007
Posts: 945
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From: Ventura California