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10-03-2012, 02:59 PM
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#1 |
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Registered User
Join Date: Feb 2008
Location: San Antonio,Tx
Posts: 83
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Seeking Wisdom
Ok. Starting rebuilding my 350 and after tearing the engine down found out that I was going to a 5 week school and shortly after returning I will be moving to Fort Polk, LA. So, I replaced rings, bearings, timing set, and the oil pump, put all back together and put it in the truck. After a rookie mistakes I got her fired up and it sounds amazing. BUT... during my rush to get things put back together before going to school, I didn't do any work to the heads and now after it runs for a little while it begins to smoke on the drivers side only. Which is why I started the rebuild in the first place. Engine was clean inside. No scaring in the cyclinder walls. Bearings were a little wore and the oil pump was weak. But nothing that should make it smoke.
I'm thinking(hoping) that I've got a head problem and hopfully its just a valve seal. I'd be interested in hearing ideas from some of you that have more experience. |
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10-03-2012, 03:52 PM
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#2 |
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Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Seeking Wisdom
Being that you just rebuilt the engine...Id say valve stem seals. How much run time on the engine since the rebuild?
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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10-03-2012, 04:14 PM
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#3 |
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Registered User
Join Date: Sep 2012
Location: Lincolnton, NC
Posts: 24
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Re: Seeking Wisdom
It does sound like valve seals... you could try a heavier weight oil.. Might help... Probably won't solve the problem...
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10-03-2012, 05:07 PM
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#4 |
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Registered User
 
Join Date: May 2012
Location: Semmes,Al.
Posts: 407
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Re: Seeking Wisdom
It's more likley worn valve guides and seals.Need to pull the head and have the head reworked when you have time.
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Go Fast and Have Fun.!! My pro street build, http://67-72chevytrucks.com/vboard/s...d.php?t=551185 |
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10-04-2012, 12:45 AM
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#5 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: Seeking Wisdom
You say you just replaced the rings. Are you sure the block didn't need to be bored?
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10-04-2012, 12:15 PM
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#6 | |
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Registered User
Join Date: Jul 2009
Location: Menifee, CA
Posts: 471
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Re: Seeking Wisdom
Quote:
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10-04-2012, 02:44 PM
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#7 |
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Registered User
Join Date: Feb 2008
Location: San Antonio,Tx
Posts: 83
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Re: Seeking Wisdom
Total run time on the engine since the rebuild is about 30 minutes.
Cylinder walls were in great shape with no scaring or pitting. And I did hone the cylinders pretty good before putting things back together. The truck sit up for several years before I started trying to get it back on the road. I always had dreams of making it a super trick show worthy truck, but now I just want to build a reliable daily driver and enjoy my truck. It was smoking the same way when I got it running prior to the overhaul. I assumed because it was smoking that it was a stuck oil ring or a broken ring. But since it still smoking the same way I'm betting its in the heads. Sounds like a good excuse to upgrade to something better than my 76cc smog era heads. |
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