Oil is leaking onto exhaust manifold on my 2.8 quattro 1998, the leak is on the left as you look at the engine from the front, I had the valve gaskets replaced but the leak remains, any sugestions would be greatfuly received
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: engine oil leak
It's very possible that the gaskets weren't installed correctly. Unlinke other cars I've owned, my 99 A4's valve cover gaskets are actually somewhat longer than they need to be (about an inch or so), and you have to be very careful when installing them that they don't get pinched outside the "channel" that they're supposed to sit in. I'd be willing to bet that the installer bumped the gasket when replacing the valve cover and knocked it out just enough that it's allowing oil to leak past the gasket. I'd pull the valve covers again and verify that they're seated correctly. I would bet they aren't - there's really nowhere else on the 2.8 for the oil to leak where it could hit the manifold.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need. goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Oil. if the smoke is coming from between the engine block and the firewall then its probably oil on the exhaust manifold. Make sure that your engine is not leaking oil from the seals and make sure the oil cap and dipstick are in place, start your car, with the hood up and observe the smoke if its bad then id take it to a mechanic but if its only mild then providing your engine isn't leaking oil it should burn off within a few minutes of the engine being started, i say watch the smoke because if it is leaking oil onto the exhaust in great amounts then it is possible it could catch fire.
CHECK AROUND EXHAUST MANIFOLD AROUND THE ENGINE LOOK FOR OIL LEAKS AROUND VALVE COVER GASKET AREA LOOK FOR COOLANT LEAK ON EXHAUST MANIFOLD.CHECK FOR OIL LEAKS ON FRONT SEAL ON CRANKSHAFT TIMING COVER.
Remove distributor to spark plug wires (12286) using Spark Plug Wire Remover T74P-6666-A.
Disconnect muffler inlet pipe.
If equipped with secondary air injection, disconnect the secondary air injection check valve tube (9B480).
Remove attaching bolts and right exhaust manifold (9430).
Inspect joint faces for signs fo exhaust leaks, cracks or any defect that would make exhaust manifold unfit for use
1. Remove oil level indicator tube (6754).
Remove spark plug heat shield.
Remove distributor to spark plug wires using Spark Plug Wire Remover T74P-6666-A.
Disconnect EGR valve to exhaust manifold tube (9D477). If equipped with air injection, disconnect the secondary air injection check valve tube.
Disconnect muffler inlet pipe.
Remove attaching bolts and exhaust manifold (9431).
Inspect joint faces for signs of exhaust leaks, cracks or any defect that would make the exhaust manifold unfit for use.
Clean mating surfaces of right exhaust manifold or left exhaust manifold and cylinder head (6049). Clean mounting flange of right exhaust manifold or left exhaust manifold and inlet pipe(s). Clean mounting surface for air injection tube or right exhaust manifold. Apply light film of Premium Long-Life Grease XG-1-C or -K or equivalent meeting Ford specification ESA-M1C75-B to right exhaust manifold or left exhaust manifold.
Position right exhaust manifold or left exhaust manifold on cylinder head. Install attaching bolts and washers, starting at fourth bolt hole from front of each right exhaust manifold or left exhaust manifold. Tighten bolts to 34-47 Nm (25-35 lb-ft), working from center right to both ends.
Position inlet pipes to right exhaust manifold or left exhaust manifold. Install attaching nuts and tighten to 34-47 Nm (25-35 lb-ft).
Position the secondary air injection check valve tube and the secondary air injection tube gasket (9C435) at rear of right-hand exhaust manifold. Install attaching bolts and tighten to 19-25 Nm (14-18 lb-ft).
Attach the secondary air injection manifold tube (9B449) to left-hand exhaust manifold fitting (located under EGR tube). Tighten nut to 30-40 Nm (22-30 lb-ft).
Attach the secondary air injection check valve tube to rear of right-hand cylinder head. Tighten bolts to 75-85 Nm (56-62 lb-ft).
Connect EGR valve to exhaust manifold tube to left exhaust manifold, if removed. Tighten nut to 53-72 Nm (39-53 lb-ft).
Install spark plug heat shield and distributor to spark plug wires.
Install oil level indicator tube to left exhaust manifold, if removed. Tighten nut to 13-24 Nm (10-18 lb-ft).
Check carefully around the valve covers, this is the area that leaks most frequently occur, and being located next to the exhaust manifold can easily cause the burning smell. There is a very easy to replace gasket under the cover. Other possibilities, shop or you when changed or added oil spilled a bit and that has worked down to the exhaust manifold and is causing the burnt oil smell. Last possibility is that you do have a slow leak on the underside of the engine that is blowing back onto the exhaust system causing the smell.
Probably a vavle cover gasket leak, small but enought to produce oil, in or on the surface of the motor doesnt take much to a lil smoke from aa hot engine...it could be collectiing in the canals ontop of the motor where the vlave covers sit on the head? or a head gasket problem....inspect it well after you run the car for a lil while, b4 it starts to smoke