Question about 1999 Cadillac Seville

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1999 cadillac concourse, I understand that the red antifreze becomes crossive after a length of time. attacking head gaskets and more. Being assured that all the red was extracted, I replaced it with green. any fall out to what I have done. TKS.

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To the best of my knowedge, the red is supposed to be an extended life coolant. All coolants become corrosive after some time and should be changed. This has become more of an issue with newer vehicles as aluminium is being used more and more to replace items which were once made from cast iron (heads, manifolds etc.) It is generally not the gaskets that fail from corrosion, but the metal itself that becomes etched by acid.
You can use any coolant in any vehicle providing that it meets the freeze and boil point requirements necessary to function HOWEVER:
if you use an antifreeze that does not have extended life feature, you MUST change it once a year.

Posted on May 09, 2009

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No problem if you did it yourself, but a problem if dealer did it because of e.p.a. regulations. And yes its carossive after time and you might of saved yourself alot of time and money replacing gasgets

Posted on May 09, 2009

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On 97cadiiac deville service it concourse new rad. New pump fan motors and hos . Car still running hot.


these were notorious for bad heads and head gaskets..they also had a screwy engine mount setup(aluminum engine mounts)..the repairs will be more than 4 times the value of the car..I'd buy some Bars Leak for head gaskets; and then get rid of it..they are a disaster

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1 Answer

What color anti-freeze igoes in 1999 cadillac concourse?


I can't advise on the type of coolant additive (I don't know your model) but in general if the coolant level is OK already then the additive won't explain this overheating.

It could be

- head gasket leak to the coolant jacket. There is a cheap test a mechanic can do for combustion gases in the coolant

- faulty temperature sensor unit

-slipping drive belt to the fan (if fitted)

- thermostat stuck closed

Jun 15, 2014 | 1999 Cadillac DeVille

1 Answer

1999 Cadillac DeVille is over heating


Vehicle has a hair line crack in head gasket. It will not register on compression test replace gaskets and have heads checked vehicle problem should be repaired

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2 Answers

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1 Answer

How do put freon in a cadillac deville concourse


the answer is simple. you DO NOT!! Even a \licensed mechanic can not if the situation doesn't warrent it. These situations are controlled by the EPA to reduct ground water contamination and putting OSONE IN THE AIR.

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1 Answer

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Either your Fan motor is faulty or the fan control resister assembly is burnt out, either of those will cause the smell.

Dec 28, 2009 | 1999 Cadillac DeVille

2 Answers

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how many miles are on it? if you have over 70k the head bolts may have let loose and allowed the head gaskets to leak they all do it

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1 Answer

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Red oil, radiator trans cooler has failed....Brown oil, iether intake or head gasket has failed...do not drive car...have it towed to a shop .

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2 Answers

I have a 1999 cadillac catera and there is water in my oil.


There are a couple of possibilities here.

Head gasket is leaking or

Engine oil cooler is leaking.

Both are expensive and quite a bit of work.

If you are planning on fixing the problem yourself, you will want to buy the haynes manual for your vehicle.

Even if you are not a mechanic, it is worth buying the manual for your vehicle. It has a lot of reference material and sometimes it will help your mechanic to fix your vehicle faster.

If you need more help, post a comment.

Thanks,

Tim

Apr 26, 2009 | 1999 Cadillac Catera

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