302 with blue smoke
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Posting Guru
Joined: Dec 2000
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From: Western Colorado USA
302 with blue smoke
It's a '84 5.0 HO out of a GT that has been rebuilt by a local shop and has 1700 miles on it, currently shoved into a 86' F-150. It was rebuilt to factory HP specs with no tweaking.
It's blowing a puff of oil smoke on a warm re-start for about 5 seconds and then clears up. On a cold start or under any throttle application, there are no signs of smoke.
I am thinking a valve guide/seal problem, anyone else have an opinion?
It's blowing a puff of oil smoke on a warm re-start for about 5 seconds and then clears up. On a cold start or under any throttle application, there are no signs of smoke.
I am thinking a valve guide/seal problem, anyone else have an opinion?
Senior User
Joined: Sep 2002
Posts: 434
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From: Oregon: Land of the Majes
302 with blue smoke
Well, take it back to the shop, time to have them sort it out, not you. Unless you did some mondo bizarro thing with the PCV system, it sounds like they left the valve seals off when they put the heads together.
Senior User
Joined: Sep 2002
Posts: 434
Likes: 2
From: Oregon: Land of the Majes
302 with blue smoke
It is also entirely possible that you mistakenly checked off the "James Bond Smokescreen" option on your engine build sheet...that has happened to me several times.......
Senior User
Joined: Jan 2002
Posts: 140
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From: CT USA
302 with blue smoke
Personally i would give it 3000 miles before i make any conclusions. If moly rings were used they take a while to break in and often will blow smoke for the first few thousand miles.....especially if you are using synthetic oil. you need a little bit of friction to break the rings in. I just find it hard to beleive anyone who rebuilds an engine would leave out valve seals and not notice.
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