: Cadillac Forum: Weird Burning Smell



usc2005
11-07-07, 10:27 AM
I recently drove my 97 cat and when i pulled up into the drive thru, i noticed a burning smell coming from my car. So when i got home i parked my car for about an hour and went out and checked my fluids. I was real low on antifreeze in my overflow tank so i filled it up to the line and i thought that maybe my engine was low on antifreeze and that was causing the burning,hot smell. So this morning i looked under the car just to make sure nothing was leaking and it wasnt, and i could still smell the smell when i got out of my car,the temp guage stays at half or one notch below so im wondering if anyone could tell me what that smell is. Maybe oil, or something? Has anyone had this smell before?

jrhartman
11-07-07, 10:53 AM
Probably leaky valve cover gaskets.

yellowxhoodie
11-07-07, 11:04 AM
yupp. had it when i first got my 2000. like hartman said, prob leaky valve cover gaskets. u prob got oil dripping onto your exhaust somewhere or onto some other hot part of the car, and its burning off so it smells.

usc2005
11-07-07, 11:43 AM
how much would it cost to fix the valves that are leaking

catera00
11-07-07, 01:10 PM
its not a leaking valvle. Its probably just a leaking valve cover gasket as the others said. Mine had the same problem and my garage stunk when the car was in there. I could smell it when I stoped at a red light and the windows were down. Call the dealer and have it looked at. Mine ws leaking into where the coilpack is (That black strip in the center of the valve cover) so I never saw the leak. I had a warranty so I dont know how much it costs.

kphinney
11-07-07, 01:59 PM
I had the same thing. Gaskets swell and shrink repeatedly under normal use. I only had to tighten my valve cover bolts -- some were barely finger tight. Unfortunately the bolts take a hex socket, but it is a very cheap fix and you can do it yourself.

yellowxhoodie
11-07-07, 02:20 PM
...if thats the problem. i had the same thing as well but ended up having to have my valve covers and head gaskets replaced...

Resilient
11-08-07, 06:52 AM
been there... valve cover gaskets, something like 400$ at dealership (3 hr labor plus parts)...

elvin315
11-08-07, 07:35 AM
I had the same thing. Gaskets swell and shrink repeatedly under normal use. I only had to tighten my valve cover bolts -- some were barely finger tight. Unfortunately the bolts take a hex socket, but it is a very cheap fix and you can do it yourself.

That's not the reason in the Catera's case. It's the engine's Crankcase Breather system's fault. The breather tubes and box get clogged with gunk and the pressurized air has no where to go so it lifts the plastic cam covers just enough to let oil squeeze past. The oil drips on the exhaust manifold's heat shields and burns off.

The fix is to clean the breathers. Whether that would be enough to stop the oil leak without replacing the gaskets I can't say but it might be worth a try. I had my gaskets replaced by the dealer before I learned the cause and it cost me $750 parts & labor. I figure it would be worth a couple of cans of GUNK cleaner to clear the Breather system and try to save the remaining $740.
http://www.omegaowners.com/forum/YaBB.pl?num=1152598350
http://www.omegaowners.com/forum/YaBB.pl?num=1192573982

If that doesn't work here are the instructions for gasket replacement.
http://www.omegaowners.com/forum/YaBB.pl?num=1152564281

Elvin

Cadi Cat
11-08-07, 09:53 AM
That's not the reason in the Catera's case. It's the engine's Crankcase Breather system's fault. The breather tubes and box get clogged with gunk and the pressurized air has no where to go so it lifts the plastic cam covers just enough to let oil squeeze past. The oil drips on the exhaust manifold's heat shields and burns off.

The fix is to clean the breathers. Whether that would be enough to stop the oil leak without replacing the gaskets I can't say but it might be worth a try. I had my gaskets replaced by the dealer before I learned the cause and it cost me $750 parts & labor. I figure it would be worth a couple of cans of GUNK cleaner to clear the Breather system and try to save the remaining $740.
http://www.omegaowners.com/forum/YaBB.pl?num=1152598350
http://www.omegaowners.com/forum/YaBB.pl?num=1192573982

If that doesn't work here are the instructions for gasket replacement.
http://www.omegaowners.com/forum/YaBB.pl?num=1152564281

Elvin



I did this. It's very easy to do and for me, really slowed the oil leak after then tightening the valve cover bolts. I don't smell it burning anymore. It used to smell up my garage. Now it doesn't.

elvin315
11-08-07, 10:29 AM
Along the same lines, read my reply to a related cam cover oil leak thread. It regards stiffer aluminum alloy cam covers.
http://www.cadillacforums.com/forums/cadillac-catera-cimarron-forum/121227-need-advice-what-i-should-do.html

Elvin