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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1686
Experience:  GM Grand Master Technician 2007. 14 year experience.
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There is an oil drip coming from under a heat shield on the

Customer Question

There is an oil drip coming from under a heat shield on the lower driver side of the engine
JA: Have you ever replaced the gaskets? Maybe the hoses?
Customer: no, car is new to me
JA: What is the model/year of your GMC?
Customer: 2009 yukon denali
JA: Are you fixing your Yukon Denali yourself? What have you tried so far?
Customer: just found the leak, I'm handy for small stuff
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 year ago.
Category: GMC
Expert:  david craig replied 1 year ago.

Hi Im David, thanks for visiting the site. can you raise the hood with the engine running and possibly see where its coming from? or get underneath the vehicle ans see if its coming from the oil pan area?

Customer: replied 1 year ago.
Have done that. It appears to be coming from under a small heat shield, which is just under the exhaust pipes on the drivers side
Customer: replied 1 year ago.
Just bought the car and had an oil change, not sure if this was a problem prior.
Expert:  david craig replied 1 year ago.

where is the oil filter on that vehicle, left or right side?

Customer: replied 1 year ago.
Bottom driver side, filter is dry
Expert:  david craig replied 1 year ago.

what about the filter housing? it leaks from the gasket a lot

Customer: replied 1 year ago.
leak is coming from well above where the filter connects
Expert:  david craig replied 1 year ago.

ok, look at the valve cover on that side.

Customer: replied 1 year ago.
it is dry
Expert:  david craig replied 1 year ago.

ok. let me look a few things up, thanks

Expert:  david craig replied 1 year ago.

the rear cam seal on the back of the head is a common problem area

Expert:  david craig replied 1 year ago.

can you send a couple of pics?

Customer: replied 1 year ago.
can I reply to the text message or do they need to be attached here?
Expert:  david craig replied 1 year ago.

attached here with a reply

Customer: replied 1 year ago.
Leaking from somewhere above the white sticker and below the top of the exhaust manifold
Customer: replied 1 year ago.
Sorry, not sure if the zip file worked. Try these.
Expert:  david craig replied 1 year ago.

looks like the oil cooler lines....

Customer: replied 1 year ago.
may need to rotate the pictures. It is dripping onto those two lines from above.
Expert:  david craig replied 1 year ago.

its very hard to orient the source. sorry man, ill opt out and see if another tech can help

Expert:  david craig replied 1 year ago.

all i know are the problem areas are the rear main seal. the rear cam seaql and the oil pan gasket

Customer: replied 1 year ago.
ok, thanks for the input. Have a good day
Expert:  david craig replied 1 year ago.

any luck on locating the source?

Customer: replied 1 year ago.
No. Only leaking until the engine cools down. Looks like it could have antifreeze mixing in the oil.
Expert:  david craig replied 1 year ago.

oh wow. whats the oil in the dipstick look like?

Customer: replied 1 year ago.
oil on the dipstick looks good. I could be mistaken about the coolant mixing in.
Expert:  david craig replied 1 year ago.

whats the coolant look like? is it filmy?

Expert:  david craig replied 1 year ago.

if i can get a better picture that might help. it very hard to tell where i am look from in the ones you sent

Customer: replied 1 year ago.
We have a verdict, hydraulic motor mount was leaking. wow, that's a new one for me. Was capturing rain water and burping out fluid.