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Cadillac Deville - Vacuum leak

17 messages,  Last post on Aug 28, 2009 at 4:15 PM

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#10 of 17 Re: Coolant Leak [jlewis6] by bolivar May 20, 2009 (8:46 pm)
Replying to: jlewis6 (May 20, 2009 3:47 pm) Well, if it is so bad that coolant is getting into a cylinder, I can't believe it's not alreay overheating.   Have you just been driving 'easy'? Slow accelerations and not been driving very fast? This might keep it from overheating, especially on short trips.   Take the car out and accelerate it hard a few times. Find the steepest hill and run it up the hill, fast. It will probably overheat.   If the car overheats and is not then totally abused by continuing to drive it, the Northstar motor is usually not hurt by a head gasket failure. Pull the car over and let it cool and refill the fluid to get the car home, slowly. It it overheats almost instantly, the car probably should be towed. The heads usually are fine, and the block does not warp. You just have the huge expense of having the bolt holes fixed up. That and new gaskets, other misc parts, and the motors are usually fine.   It's just when you need $3,000 or so to fix a $6,000 car (or less), it just is not worth it.
#11 of 17 What If I don't overheat? by jlewis6 May 24, 2009 (4:08 pm)
When driving up steep hills and distance. My question is: 1. How long can I keep driving this car in this present state? Will the engine sieze up? Do I just need to keep an eye on the over flow tank for coolant levels? Replies to this message: bolivar (May 24, 2009 4:19 pm)
#12 of 17 Re: What If I don't overheat? [jlewis6] by bolivar May 24, 2009 (4:19 pm)
Replying to: jlewis6 (May 24, 2009 4:08 pm) So, you really want an answer to this un-answerable question?   Drive it until it seizes. Then you've driven it too far. This is the best answer I can give.
#13 of 17 I understand what you are saying by jlewis6 May 25, 2009 (3:18 am)
My question then is this: 1. Is overheating the only way to tell if this loose head bolt, overboring of the block concept will hold up? Will the engine start to skip? Replies to this message: bolivar (May 26, 2009 2:17 am)
#14 of 17 Re: I understand what you are saying [jlewis6] by bolivar May 26, 2009 (2:17 am)
Replying to: jlewis6 (May 25, 2009 3:18 am) -There supposedly is a test kit that can be bought at parts houses. It tests the coolant for combustion by-products, which indicate gases from the piston are being pushed into the coolant.   -A correct 'Timesert' installation (overboring of bolt holes and steel inserts) is supposed to pretty much cure the head bolt problem.   -Don't know about 'skip'.   Is your motor overheating or not? If you are just losing coolant and it is not overheating, you have a leak somewhere. Unless your are in the early stages of a head gasket failure.
#15 of 17 The Test Kit by jlewis6 May 27, 2009 (10:06 am)
Was done by the same guy that put the used motor back in 07 my Deville. The color in the tube was light green. He said he wasn't sure if it was the head gasket, but noted he had to take more apart to see if coolant was getting in on other cylinders. At that point, I felt like all I was doing was just throwing money into a hole. So first: 1. What does the color light green liquid mean is what I saw in that tube, the mechanic showed me?? And 2. My car is currently not running hot. I have not driven it over 25miles a jaunt and back once or twice a week at best. I am currently noticing that I am using more dexcool as it is probably getting mixed with the combustible gases and thats whats burning out of my tail pipe for about 20mins , then turns clear as motor is hot. She still drives good when driven and with same power and take off. I do need to do something soon becasue I also noticed just recently that my surge tank is starting to seep, probably due to pressure back flow into the surge tank with heat. Any suggestions besides push it off a cliff.? Can I get this problem fixed for under 3000 dollars? And i really can't afford that?? Replies to this message: bolivar (May 27, 2009 10:35 pm)
#16 of 17 Re: The Test Kit [jlewis6] by bolivar May 27, 2009 (10:35 pm)
Replying to: jlewis6 (May 27, 2009 10:06 am) 1) No idea, you need the instructions for that test kit.   2) If it's not running hot, I would look for a leak.
#17 of 17 please help by al03 Aug 28, 2009 (4:15 pm)
I have a 96 cadillac deville and have some issues with it the radiator was changed and every now and again i get the check coolant level light come on and have to fill it up again,also my car has a new blower motor and the air does not come in thru the face vents it comes in thru the top and bottom.Another issue I have is that the service emissions light comes on with the service engine soon light,It was off but a couple weeks ago i did some routne maintenace on it and it keeps coming on. I know thease things are minor but this car has only 93,000 miles on it and i would like to fix all thease things in 1 day what kind of parts should i buy or can you help me.

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