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The other morning I remote started our 2008 DTS-L and it started making some bad bearing racket from under the hood. It continued for 10+ seconds until I turned the key to on in the car at which time it ceased. My initial thought was that something is wearing out and it must be electronically controlled. AC compressor was the first to mind. The temp was probably about 25 out when this happened.

Does anyone know if the AC compressor comes on automatically when these Caddys are remote started and then shut off when the car is turned on?

Does anyone else have any thoughts?

The wife called this morning and said that the car is moaning when she turns so she thinks that it is the PS pump. I HIGHLY doubt it as the noise that I heard was bad enough that whatever it was, has quit turning.

Could it be cooling fan bearings? Do the cooling fans turn on when the car is remote started?

Caddy_Grill.jpg2008 DTS
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Is there a way to force it on?

There may be a way if you had a Tech-2.

You might get piece of rubber hose or a mechanic's stethoscope and the next time the engine is cold, start it up and begin listening to various accessories. I highly doubt there is a main or rod bearing knocking.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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Well, I think that I have figured out what was making the noise. Last night the wife calls and says that the car has over heated and she is on the side of the highway (Y'all can see where this is going). I gather 2 2-liter bottles of water and grab a gallon of dex-cool from Walmart. I get to where she is at and pop the hood. I found antifreeze on top of the water pump. Looking to see if I could determine a leak, I notice that the belt was off of the camshaft pulley and the camshaft pulley was damaged severely. I called Onstar and they told me that I had Cadillac Roadside Service(I vaguely remember something about that when I got the car). No questions asked, a tow truck was deployed to the site and they towed the car 10 miles back home.

I assume that from the pulley and belt damage that the water pump locked up. If this is true, is it normal to find coolant leaked around under the hood? Someone tell me that the head gasket should be fine.

Also, does anyone have any part numbers for that pulley and belt?

Caddy_Grill.jpg2008 DTS
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It sounds like the water pump locked up and caused the issue. I would also check the water pump tensioner tensioner bearing as well. I would not worry about a headgasket.

Borrow, rent or buy a power steering pump pulley puller to R&R the cam pulley. DO NOT attempt to remove it in any other way or you will damage the camshaft.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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...Borrow, rent or buy a power steering pump pulley puller to R&R the cam pulley. DO NOT attempt to remove it in any other way or you will damage the camshaft....

I read that. I have a link to a $20 puller from Harbor Freight.

Caddy_Grill.jpg2008 DTS
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I was going to second the air pump but am glad you found the problem, Although unfortunate way to find out. I am surprised that the pump even turned when you started the car. must have seized and the cam forced it to turn til it seized again

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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