Urgent mysterious oil leak causing engine to miss - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums
 
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post #1 of 6 (permalink) Old 09-02-2009, 03:24 PM Thread Starter
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mysterious oil leak causing engine to miss

so put some lt's on then OTVC. rewired my o2's with extensions and sodered then heatshrinked them together. wrapped the wires up in electrical tape. here's the problem.... i have the o2 wire mounted to the two bolts on the tc sheild. there is oil coming off the back of the engine somewhere causing oil to leak down the top of the trannsmission and onto the o2 wire on the drivers side..i can see drops of oil on the o2 sensor. this o2 sensor is causing my driver side plugs to burn up. i can't put the o2 wire any where else so i'm stuck to having it hooked up to the tc sheild.

possible leaking points...
1. valve cover- not leaking
2. oil sender unit- nope
3. intake manifold-nope
4. cylinder head- nope

any ideas of where it's coming from?
i'm thinking about duct taping my while driver side o2 setup so oil just rns down and off the duct tape.

any ideas?!?!
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post #2 of 6 (permalink) Old 09-02-2009, 03:27 PM
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Pull the TC cover, and check if the oil is coming from that area.

Could possibly be the rear main seal leaking.



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post #3 of 6 (permalink) Old 09-02-2009, 03:29 PM
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rear main, pan gasket, dipstick tube



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post #4 of 6 (permalink) Old 09-02-2009, 03:32 PM
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Also, oil dripping on the wires or even the unit itself shouldn't cause an erratic reading. especially not one so severe it starts burning up plugs. sounds more like there is something else going on with the connection than some oil being on the wires.

Last edited by ProjektNitemare13; 09-02-2009 at 04:40 PM.
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post #5 of 6 (permalink) Old 09-02-2009, 04:22 PM
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you should never modify the wire on the o2 itself - did you extend the o2 wire or the harness wire?
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post #6 of 6 (permalink) Old 09-02-2009, 04:53 PM Thread Starter
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Quote:
Originally Posted by steveo View Post
you should never modify the wire on the o2 itself - did you extend the o2 wire or the harness wire?
not the harness wire, the o2 wire...i spliced the wires and connected the four wires in the order they came off.

also oil running down the wires onto the or sensor could cause the o2 sensor to fail which leads to my driver's side plugs getting burned up..correct?

Last edited by mrp82391; 09-02-2009 at 08:24 PM.
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