2003 Cadillac CTS Logo
Posted on Jan 06, 2009
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2003 cts has oil leak at rear left side of left hand cylinder bank it drips on exhaust causing smell and smoke also saturated O2 sensor and turned on engine light dificult to get to or even see

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  • Anonymous Jan 17, 2009

    oil leks when engine is cold in the front rightby the condser unit and the dip stick. only happend one time whjen temp 2 belo zero

  • howardm153 Jan 22, 2009

    My CTS has an oil leak according to the Cadilac mechanic it's leaking from the valve cover and needs a new gasket.

    There are two gaskets available for this V6 engin a one peice $30 and a two peice kit $80 I need to know what one to order as the dealer says they don't know until the valve cover is off.

    The cost for the dealer is $800 I plan to repair it my self can any one help

  • ccnyguy2 Jan 26, 2009

    just a heads up, what CAUSED the problem? did it happen after driving in deep snow? there is a fix kit for the breather ,avail. for this car, 2003's were plugging w/snow and blowing gaskets , so before u repair u might want to look into this..

  • Anonymous Jan 29, 2009

    same problem

  • Anonymous May 01, 2009

    I have a 3003 Caddy CTS with 90,000 miles on it and the Valve Head Gasket is leaking. In addition to the replacing the head gasket, i was told that three manifold gaskets are "in the way" and have to be replaced to opnen the engine. I was quoted about 600.00, that's when I called a highly qualified "old school" family shop known for their integrity. Price for a new Valve head gasket installed? 250.00, not 600.00, so I am wondering, does the repair require the removal of manifold gaskets that are then replaced?

    Baffled in FL.

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  • Posted on Feb 04, 2009
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Ok, woodhujr,if im not mistaken you had another help request of cranckcase pressure...that problem is causing your leak.
ccny, i have no idea what you are talking about, feel free to enlighten us...
Howard, the best advise i have for you in replacing the valve cover gasket(s) is to get a repair manual for this car/engine and follow the steps as outlined there. I couldnt try to give you step by step instructions in this little box without way oversimplifying.

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  • Posted on Mar 19, 2015
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You have more crankcase pressure than you are supposed to. The pcv system needs to be modified. Check on the cadillac forums or search for a TSB on the system. I have seen ddetailed pdfs on the modification that gm sent out to the dealerships.

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  • Posted on Dec 20, 2009
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When it is very cold out it seems like my breathers get frozen open and the oil leaks from there. My mechanic noticed a bunch of condensation build up which froze. He cleaned it last year and no more problems. It just happened again this year when the temp dipped real low.

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