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07 Buick Lacrosse V6 2.8L
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neskid
New User
Mar 7, 2020, 1:55 PM
Post #1 of 8
(2327 views)
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07 Buick Lacrosse V6 2.8L
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Was experiencing overheating issues and avoided operating the vehicle until I replaced the thermostat. Took it out for a drive and everything was looking good until a spike in heat after about 10 highway miles. Parked the vehicle and let the car cool off for a few hours. Tried to make the trip back home but immediately overheated so bad the car stalled out.
Had the vehicle towed and a few days later watched the vehicle at idle and no overheating but some high temps. Was getting some white smoke off the bay by the firewall at the back of the engine so chalked it up to a bad head gasket.
Removed the intake, exhaust, and both heads with no definite sign of gasket failure. Found a lot of oil in the upper intake manifold and oil in 2 of the cylinders. Need to inspect the heads for warpage but wondering if the heads may be fine and the issues could be due to intake and/or intake gasket failure?
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neskid
New User
Mar 7, 2020, 4:22 PM
Post #3 of 8
(2318 views)
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Re: 07 Buick Lacrosse V6 2.8L
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Any help what would cause the oil leak into some of the combustion chambers and into the intake manifold?
I also noticed after idle test I had oil leaking down the from the head/valve covers.
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 7, 2020, 4:26 PM
Post #4 of 8
(2314 views)
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Re: 07 Buick Lacrosse V6 2.8L
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Since there is no such engine as a 2.8 in that vehicle, I have no idea what you are dealing with.
The choices are 3.6 and 3.8.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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neskid
New User
Mar 7, 2020, 4:43 PM
Post #5 of 8
(2310 views)
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Re: 07 Buick Lacrosse V6 2.8L
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Sorry I meant 3.8L
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 7, 2020, 4:54 PM
Post #6 of 8
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Re: 07 Buick Lacrosse V6 2.8L
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It's hard to tell you anything without seeing the situation myself. If the valve covers are leaking, that's no mystery, replace the gaskets.
If there is oil in the upper intake, that tends to point to excessive compression blowby or a bad PCV system but again, I'm not there to see the situation.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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neskid
New User
Mar 30, 2020, 5:14 PM
Post #7 of 8
(2081 views)
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Re: 07 Buick Lacrosse V6 2.8L
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Ok well after replacing all gaskets from the head up and getting everything back together the car runs but after about a minute I got smoke off the right side yet again. Any suggestions?
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 30, 2020, 5:21 PM
Post #8 of 8
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Re: 07 Buick Lacrosse V6 2.8L
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If you are still getting smoke in the front of the car, then you still have a leak somewhere.
Could be engine oil, could be coolant, could be trans fluid.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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