front cyl. loading up with oil
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Intermediate
Joined: Sep 2014
Posts: 28
Likes: 2
From: branford ct.
front cyl. loading up with oil
hello guys , I have a question for you .
I have a 1993 1200 sportster I purchased as a project . installed new .010 over KB pistons and heads were reworked at machine shop . the engine went together ok and started and ran strong . I put about 100 miles on it when noticed some smoke coming from exhaust pipe front cyl . removed head and found exhaust port wet with oil and oil puddling up on top of piston . I had the head rechecked from machine shop and they said it checked out ok ? the cyl. looks good (no visible scores on cyl. walls ) could that much oil be sucked up by piston rings ? or am I missing something else . just want to make sure before I put this back together .
thank you
I have a 1993 1200 sportster I purchased as a project . installed new .010 over KB pistons and heads were reworked at machine shop . the engine went together ok and started and ran strong . I put about 100 miles on it when noticed some smoke coming from exhaust pipe front cyl . removed head and found exhaust port wet with oil and oil puddling up on top of piston . I had the head rechecked from machine shop and they said it checked out ok ? the cyl. looks good (no visible scores on cyl. walls ) could that much oil be sucked up by piston rings ? or am I missing something else . just want to make sure before I put this back together .
thank you
HDF Community Team
Joined: Jun 2006
Posts: 12,780
Likes: 2,609
From: san antonio
Rings could be installed wrong; head guy could be blowing smoke up your ***, etc.
Get your hands on compression and leak down testers and do the tests; the problem should be obvious.
Get your hands on compression and leak down testers and do the tests; the problem should be obvious.
Seasoned HDF Member
Joined: Dec 2009
Posts: 9,166
Likes: 1,911
From: Doghouse... mostly
The rings are either in the wrong order or installed in a backward position. Time for a tear down.
Thread Starter
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Intermediate
Joined: Sep 2014
Posts: 28
Likes: 2
From: branford ct.
ok thank you for replies but I did not mention during initial tear down I found broken exhaust valve on rear cylinder . I think I should check rods for damage . there was a lot of scores in cylinder walls with only 100 miles on engine
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