Leaking coolant? Head gasket???

96Caddy · #1 (**permalink**) 02-01-04, 07:41 PM

I own a 1996 Caddy Sedan Deville. I just changed the radiator, pressure cap, thermostat, and water pump and my car is still low on coolant every 2 or 3 days with minimal driving. The oil doesn't have a water in it and there is no smoke coming out of the tailpipes. Any ideas where the water is going??? There isn't any water leaking onto the ground.

ShadowLvr400 · #2 (**permalink**) 02-01-04, 08:03 PM

It sounds like it's pushing the coolant out somewhere.... Try this, reload the water, and have another vehicle drive alongside you on the right. (Think like you just passed someone.) Drive, stomp on the gas, cruise, play around a bit. If your friend gets blasted with water, you've got the same blow I have. Another option is to simply go for a drive, be a bit hard on the car if you want. stop, get out, and check your passenger front tire. If there's moisture on it, and probably on the side there, it's pushing the coolant out the release line. You other option is to do a compression test. Not astoundingly hard.

Anthony Cipriano · #3 (**permalink**) 02-02-04, 04:06 PM

Did you add the GM coolant supplement (sealer) to the sytem to make sure that there are no nuisance leaks anywhere? Possibly there's a coolant leak into the valley of the engine that is going undetected. The sealer would stop that quickly. Use 6 of the GM coolant supplement pellets or two tubes of the BarsLeaks "golden seal" powder in the clear tubes (same exact material) and install it into the radiator hose not the surge tank. Just disconnect the hose, install the supplement/sealer and reconnect the hose. Refill the system with 50/50 premix and drive for 10-20 miles to get the sealant circulating through the system. Do not install the sealer into the pressurized surge tank as it will not get transferred through the sytem correctly. There is very little flow through the surge tank to disperse the sealer.

Use a strong flashlight to look into the valley of the engine (the valley is dry) just behind the power steering pump. You can see down into the valley there. Look for coolant that would indicate a leak into the valley. If so, it's harmless. Use the sealer to seal the system up.

The sealer was installed when the engine was installed at the factory. It may need replenishing if there was a casting or porosity seepage that it was sealing all this time. Harmless - just a nuisance leak.

If you continue to lose coolant you can check the head gaskets if you suspect them. Use an old spark plug shell as an adapter and pressurize each chamber with 120psi shop air through the spark plug port. Watch the pressurized surge tank for bubbling. Foolproof check to see if the head gasket is the problem.

96Caddy · #4 (**permalink**) 02-03-04, 03:57 PM

The water level is going down faster and faster. Yesterday I had to pour three containers of coolant into it. All day I drove it twice, maybe 5 miles all day at most.

Anthony Cipriano · #5 (**permalink**) 02-03-04, 05:25 PM

Quote:

Originally Posted by 96Caddy

The water level is going down faster and faster. Yesterday I had to pour three containers of coolant into it. All day I drove it twice, maybe 5 miles all day at most.

Did you install the coolant supplement/sealer? Did you look under the intake to see if it is leaking into the (dry) valley of the engine?

96Caddy · #6 (**permalink**) 02-04-04, 03:15 PM

Quote:

Originally Posted by Anthony Cipriano

Did you install the coolant supplement/sealer?

Did you install the coolant supplement/sealer? Did you look under the intake to see if it is leaking into the (dry) valley of the engine?

I installed the coolant supplement/ sealer but I put it in the tank. I'm someone told me to take off the radiator hose and put two of them in there. I'm going to do that later on today.

Anthony Cipriano · #7 (**permalink**) 02-04-04, 04:58 PM

Quote:

Originally Posted by 96Caddy

I installed the coolant supplement/ sealer but I put it in the tank. I'm someone told me to take off the radiator hose and put two of them in there. I'm going to do that later on today.

Yes. Those were the instructions in the first response to your post. See above.

"Use 6 of the GM coolant supplement pellets or two tubes of the BarsLeaks "golden seal" powder in the clear tubes (same exact material) and install it into the radiator hose not the surge tank. Just disconnect the hose, install the supplement/sealer and reconnect the hose."

Aurora5000 · #8 (**permalink**) 02-12-04, 10:45 AM

Hey Anthony,
What is the best way to install the pellets/bars goldenseal into the
system? Do you drain the radiator first then install pellets in the rad. hose
that runs on the topside of radiator. I have 4.0L 2002 Aurora and assume
the plumbing is similiar. I am trying to keep the fluid loss at a min.--catching in a clean drain pan and then re-inserting fluid back in line or overflow tank.
The leak is coming fron the water pump area. Still under warranty but hate to take it in unless necessary. Only leaks 2 or 3 drops a day. If it sits for 2
days, you have a puddle about the size of a dollar bill. Has the pink Dexcool form factory.
What is your take?

Thanks,
Steve

WillGlueIt · #9 (**permalink**) 02-13-04, 08:10 AM

The coolant supplement pellets should be put into the hose that feeds into the bottom of the radiator. Drain the cooling system, install the pellets then use a 50/50 mix of Dexcool and distilled water too refill the system.

Dexcool is ORANGE, if you are seeing a pink fluid you might be seeing transmission fluid. I would not re-insert that fluid you are collecting in the pan, back into the cooling system.

If the car is still under warranty, just take it in. What ever you do, DO NOT tell them you re-inserted that fluid into the cooling system. That could give them a reason to void your warranty.

Good Luck

Anthony Cipriano · #10 (**permalink**) 02-13-04, 01:17 PM

Quote:

Originally Posted by Aurora5000

Hey Anthony,
What is the best way to install the pellets/bars goldenseal into the
system? Do you drain the radiator first then install pellets in the rad. hose
that runs on the topside of radiator. I have 4.0L 2002 Aurora and assume
the plumbing is similiar. I am trying to keep the fluid loss at a min.--catching in a clean drain pan and then re-inserting fluid back in line or overflow tank.
The leak is coming fron the water pump area. Still under warranty but hate to take it in unless necessary. Only leaks 2 or 3 drops a day. If it sits for 2
days, you have a puddle about the size of a dollar bill. Has the pink Dexcool form factory.
What is your take?

Thanks,
Steve

You can put the coolant supplement/sealer into either of the radiator hoses. Whichever is more convenient. Just don't put it into the pressurized surge tank as it wont get dispersed through the system. Personally, I would take the opportunity when you "spill" a little fluid to add fresh rather than reuse. Just a good opportunity to keep replenishing the coolant and refreshing the sytem rather than reinstalling old fluid.