: New Owner 93 Eldorado pic. ? about HG issues in the early Northstars



wrightbenz
07-05-12, 12:56 AM
94293Hi everyone, I just purchased this really clean 93 Eldorado and have some questions. First the original owner said the car has never had HG issues. Are the early models better than later years when it comes to HG issues?

The car is in good shape with only 93k miles on it, but it is missing a bit and feels slugish to me. The car has not been driven much in the las 5 years so this may be part of the problem but you guys may have some other ideas of what to do and look at.

Car dosen't smoke and the oil is clean, but there is some oily carbon like residue in the overflow tank. Is this common with these cars or is it early signs of a bigger HG issue or possibly a past issue?

Faded Crest
07-05-12, 01:39 AM
There are far fewer reports of head gasket issues on early northstars. I have a '94, exact same engine and mine has 133k no problems. You might be running rough because you are due for a tune up. Also you might want to clean your throttle body. Unless your car is overheating I wouldn't even worry about a head gasket.

BTW, Pretty car! :thumbsup:

wrightbenz
07-05-12, 01:48 AM
Thanks the car is amazingly clean and not overheating so all may be well. Not sure why the coolant tank is oily, but time will tell. Car also needs a muffler I believe, its a bit loud other than that all seems well.

Faded Crest
07-05-12, 11:18 AM
If you need a muffler, I suggest you go find one at pull a part. They are very expensive brand new.

wrightbenz
07-05-12, 02:29 PM
I have thought about that. Will the later model exhausts fit my early car?

Faded Crest
07-05-12, 03:27 PM
I just took a peek under my '94 and '98 Eldorados. Exhaust systems are different, but the mufflers themselves might be the same.

creeker
07-05-12, 04:14 PM
Do you have the 4.9 or 4.6 engine?, the base model has the 4.9 and the etc has the 4.6.

wrightbenz
07-05-12, 04:25 PM
I have the 4.6 not sure if it's a touring or sport though apparently one has a bit more HP than the other.

Faded Crest
07-05-12, 04:27 PM
If you have the Northstar 4.6 it is the Touring Coupe with 295 hp. "9" code.

creeker
07-05-12, 04:31 PM
I have the 4.6 not sure if it's a touring or sport though apparently one has a bit more HP than the other.

It's the eldorado touring coupe, the base model like mine is an eldorado sport coupe, I couldn't see front of your car, the base model has the caddy crest on the hood
and does not have parking/fog lights , yours should have the crest in the grille and also have parking/fog lights,

vincentm
07-05-12, 06:31 PM
Nice Eldorado, wow that's a clean one.

wrightbenz
07-05-12, 10:27 PM
Nice Eldorado, wow that's a clean one.

Thanks, I got a great deal on the car too. Think unbelievable price and its probably less. Brand new tires and battery too. AC needs work but I can handle that. This was an R12 car must have been one of the last.

Faded Crest
07-06-12, 12:47 AM
Unbelievable deals are the best kind... They are out there if you are patient! :thumbsup: BTW, you are correct, '93 was the last year for R-12.

wrightbenz
07-06-12, 09:20 AM
Unbelievable deals are the best kind... They are out there if you are patient! :thumbsup: BTW, you are correct, '93 was the last year for R-12.

Good deals do come along. I just hope I don't find the HG issue as the reason why. So far everything seems to be ok other than the residue in the expansion tank. Drain and fill this weekend and see what happens.

Which Bars leak is it that I need, they have several. Is it the old tubes with the metal looking shavings that have been around forever?

Faded Crest
07-06-12, 10:10 AM
Skip the bars stop leak. It has proven to be a bad idea on Northstars. On the earlier 4.X cars yes, but not on a Northstar. Like I said, don't let the head gaskets worry you unless you are overheating. Oily residue would be more likely to be the result of a cracked radiator than a head gasket leak. Northstars rarely mix water and oil when the head gaskets go. The early Northstars were more known for midcase and rear main seal oil leaks than head gasket problems.

wrightbenz
07-06-12, 10:34 AM
Skip the bars stop leak. It has proven to be a bad idea on Northstars. On the earlier 4.X cars yes, but not on a Northstar. Like I said, don't let the head gaskets worry you unless you are overheating. Oily residue would be more likely to be the result of a cracked radiator than a head gasket leak. Northstars rarely mix water and oil when the head gaskets go. The early Northstars were more known for midcase and rear main seal oil leaks than head gasket problems.

really, seems like everything I have read says add some bars leak with fresh coolant often. I haven't seen any oil leaking. Was this a recall? Possibly the original owner had it taken car of.

Faded Crest
07-06-12, 10:55 AM
The stop leak does nothing for the cooling system except to stop it up.

If you have no oil leaks, maybe it was taken care of... Seems like they were more concerned about oil leaks in the early days because it was so alarming to owners. But after years of leaky Northstars, people learned to live with it. Of course, I don't suppose they all leaked. It was not a recall. The only way to fix the leaks is to pull the engine out. Not worth doing in most cases.

vincentm
07-06-12, 11:33 AM
Bars Leak = Clogged heater core.

Ranger
07-06-12, 12:01 PM
:yeah:

GM even stopped using it. Go to the top of the forum page and read up on the sealant tabs in the "Everything You ever Wanted To Know About Cooling System Sealant Tabs" sticky.

wrightbenz
07-06-12, 04:15 PM
:yeah:

GM even stopped using it. Go to the top of the forum page and read up on the sealant tabs in the "Everything You ever Wanted To Know About Cooling System Sealant Tabs" sticky.


Good to know. but no one has commented on why I have oily residue in my expansion tank??? Is this common or hasn't anyone stuck there fingers in there to find out like I did....

RippyPartsDept
07-06-12, 04:21 PM
coolant is kind of oily

it's common to have residue in the expansion tank

nothing seems out of order here

maybe if you could take a picture we could tell you if it looks normal

CadillacLuke24
07-09-12, 03:16 AM
Yeah sounds like everything is good.

If there aren't warning lights staring you down, and your Eldo is running fine, QUIT WORRYING. :yup: Sounds like you got REALLY lucky and got a NICE Cadillac for little. Go out and enjoy 'er!

wrightbenz
07-09-12, 09:15 AM
You guys were right. I changed the coolant and it looked fine, no oil. Also evacuated the AC system and refilled with R134 so all is well. The more I drive it the better it runs, just needs to be driven after sitting to much.

CadillacLuke24
07-09-12, 03:23 PM
That's what they say. Use it or lose it! Now go to the technical archives and read up on the carbon cleaning trick you can do with Northstars. Time for some FUN :excited: