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165 messages,  Last post on Nov 06, 2006 at 10:29 AM

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#117 of 165 1997 deville de elagance by jdobbs Jul 29, 2006 (1:24 pm)
I understand that these northstars have a tendency to blow the head gasket and that leads to a few thousand bucks. Has anyone experienced any of these advertised quick fixes that supposedly stop the leaks? I am not a proponent of "quick fixes" but recently my caddy is really missing on start-up but after about driving for 20 seconds it runs smooth. The third problem is when the AC is od and I accelerate there is a flatuating noise that occurs until I let up on the accelerator. Any comments on any. (BESIDES GET RID OF IT!) Replies to this message: bolivar (Jul 29, 2006 1:47 pm) bolivar (Jul 29, 2006 2:01 pm)
#118 of 165 Re: 1997 deville de elagance [jdobbs] by bolivar Jul 29, 2006 (1:47 pm)
Replying to: jdobbs (Jul 29, 2006 1:24 pm) Start problem may be either the Fuel Pressure Regular (allowing fuel to enter the vacuum line that is attacted, which is then drawn into the intake causing overrich condition with hard starting) or, an injector (or more than one) may be leaking, allowing fuel to leak into a cylinder again causing overrich and hard start.
#119 of 165 Re: 1997 deville de elagance [jdobbs] by bolivar Jul 29, 2006 (2:01 pm)
Replying to: jdobbs (Jul 29, 2006 1:24 pm) Once the head gasket is leaking very much, nothing can be done except a new gasket. And Timezerts should also me installed when this is done. Involves pulling the motor, overdrilling all the head bolts, rethreading, and screwing in Timesert. Which is steel insert that the head bolts screw into. These will not 'pull out' or loosen and the head gaskets should never fail again. Few shops know how to do this. Many Cadillac dealers will not do it.   You should be running the 'pills' in the cooling system. These are available at Cadillac and I'm pretty sure your car has a sticker on the plastic cover over the radiator that gives the GM part number for these. About $8 for 6. Do not put them in the surge tank under the radiator cap. There is not adequate flow there to move them throughout the system. You should pull a radiator hose loose and put 3 to 6 pills in there. If you go this far, you should just pull the lower hose and drain the system, refilling with long-life antifreeze and water, 50/50 mix. The 'pill' which has ground gensen root (no lie, this is what is in it) is about the only thing that can help. It will fill and close off very minor leaks. But if the head bolts start to loosen, the head gasket is going to leak, the car will run hot, hot, hot and something major will have to be done -replace the motor or replace the gaskets (do both of them since the motor is pulled) and timeserting the head bolts.
#120 of 165 a/c problem by rdmd5634 Jul 31, 2006 (8:16 pm)
87 deville 4.1 a/c will quit running (clutch) when i cross a couple of contacts at the window electrical switch it starts running, (i`m scared) ever heard of that before? thanks
#121 of 165 AC problem by pittbull69 Aug 01, 2006 (2:52 pm)
I have a 1995 cadillac sedan deville, my AC does not blow, it says ac compressor off and very low refrigerant, but I have had refrigerant put in the car. My mechanic told me it was an electrical probelm, if I hold this peice down the air will blow but it's not cold, and when I let this peice go it stops blowing all together. I need to know the problem ad if possible what is the name of this piece!
#122 of 165 Electronic Digital Dash problems on 86 Caddy by jeffc Aug 16, 2006 (2:49 am)
My son bought a 1986 Cadillac Deville, mint 51000 miles.   While trying to install an aftermarket stereo ( why, I'll never know)the digital dash suddenly went out. Any ideas what happened? Where does he start? Hopefully, he isn't looking at a major repair job

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