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Discussion Starter · #1 ·
Happy thanksgiving all.

Well it seems that my 2004 XLR is developing both the oil leak and the coolant leak.

I'll get the water pump changed and assume that that is the root cause, it isn't the radiator. The loss is very slight indeed, no drip as yet under the car but a close examination of the front of the engine reveals an orange fluid.

The same examination also reveals an very slight oil weep, presumably from the front cover.

Looking through the many posts on the subject here, there is a suggestion that there are 'special tools' available to help with the gasket replacement, but my dealer has been unable to identify any such.

There seem to be two routes to repair:

1/ Take the engine out (or more accurately, drop the whole power-train out under the car involving substantial dismantling of the front and rear suspension and much else

2/ Take the power steering rack out, involving dismantling one front suspension unit.

In both cases the problem is removing the harmonic balancer, it lies right behind the steering rack and there is no room otherwise.

Apart from that, the actual timing cover does not seem to have anything special about it at all, just a standard GM front cover.

Anyone know differently? Advice welcome TIA.
 

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Discussion Starter · #2 ·
Happy thanksgiving all.

Well it seems that my 2004 XLR is developing both the oil leak and the coolant leak.

I'll get the water pump changed and assume that that is the root cause, it isn't the radiator. The loss is very slight indeed, no drip as yet under the car but a close examination of the front of the engine reveals an orange fluid.

The same examination also reveals an very slight oil weep, presumably from the front cover.

Looking through the many posts on the subject here, there is a suggestion that there are 'special tools' available to help with the gasket replacement, but my dealer has been unable to identify any such.

There seem to be two routes to repair:

1/ Take the engine out (or more accurately, drop the whole power-train out under the car involving substantial dismantling of the front and rear suspension and much else

2/ Take the power steering rack out, involving dismantling one front suspension unit.

In both cases the problem is removing the harmonic balancer, it lies right behind the steering rack and there is no room otherwise.

Apart from that, the actual timing cover does not seem to have anything special about it at all, just a standard GM front cover.

Anyone know differently? Advice welcome TIA.
Given nobody has jumped in on this, I am going to assume that there is no easy way to fixing it.

That being the case, is this the time to suggest perhaps introducing a series of topics that capture definitive information and advice on topics, such as this one? A search on the subject results in a fair number of hits, but the advice contained in those hits seems erratic.
 

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Mine was option #1, they dropped the complete front under carriage, (terrible sight) and then were able to reach the leak area, I wish I could remember where it was, but it did take a lot of parts having to be removed. I sure wouldn't attempt it.
 

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Discussion Starter · #4 ·
Mine was option #1, they dropped the complete front under carriage, (terrible sight) and then were able to reach the leak area, I wish I could remember where it was, but it did take a lot of parts having to be removed. I sure wouldn't attempt it.
If the engine was still in your XLR, that is option #2, still drastic stuff, but not as dramatic as option #1...

The leak is a problem on the front timing chain cover (aka the timing chest cover), basically the gasket leaks (weeps) slightly. From what I have researched, the fix is easy enough, replace the gasket with a better one, but getting there is the problem. The harmonic balancer has to come off (and go on again), and that is the real problem.
 

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Good luck

I have a 2005 XLR and with 12000 mile started leaking oil It was just a drop every time we took the car out. After 3 trips to the dealer and them tearing the engine apart they were still unable to stop the leak.
I bought the GM extended warrenty the best buy I ever made on the car.
After 3 try's Cadallic put a brand new engine in the car.
Good luck with yours.

Brutus8977
 

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Oil leaks are common with these engines. Embarrased to park my cars in my friends driveway. I have had a 2005 STS with the 4.6 leaking since it was new. Dealer I purchased it from could never fix the leak, I don't think they wanted to. I finally found a dealer that could fix it. Oil pan gasket and oil filter adapter were replaced. Then my 2006 XLR-V with the 4.4 was leaking oil. This time from the timing chain cover. This was fixed just a few months ago. Both under warranty! Now I can take the cardboard off the floor in the garage and no oil on the floor.
 

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I have a dependable XLR technician. I had him reseal the entire engine. He used a stronger more resistant sealer than was available when the engine was manufactured,. He also put new headers and a Corsa exhaust on, fixed the leak whenever the tanks were fully fueled.
 
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