jwbeck17

I just noticed today a hairline crack on the top of the radiator overflow tank. Never noticed it before until today, as I opened the hood after running it and noticed some minor bubbling coming out of the crack near the top center indent. The indent has some wetness, so that may be from the leak. There's no leakage on the ground, so it must be minor. Fluid is right exactly where it should be.

Is this a simple repair? Could do an overflow replacement, or just epoxy the crack.

Any recommendations?

James Bailey

Get a new tank.....it is not an overflow but part of the pressurized cooling system and very important that it hold the pressure to prevent coolant from boiling in the engine...

spock04

noticed a crack on my 94 GTS overflow tank and the next day wouldn't hold pressure. replace!

jwbeck17

I figured that would be the answer. I'll reach out to Roger about the part. Is it relatively easy to install?

James Bailey

it can be hard to reach the rear mounting bolt.....but you can cut up the old tank for access if you need to.

Bilal928S4

So how do you put that bolt back after installing the new expansion tank?

syoo8

I think most people leave the tank in the car with two bolts.

jpitman2

At least the LHD part is affordable! The RHD unit is crazy , around A$600 last I heard. I replaced my tank with an alloy one out of a maker in Brisbane a few years ago for A$200 ish. You have 928motorsports doing a LHD one in alloy even cheaper now.
jp 83 Euro S AT 55k

syoo8

Yes and no. The only time I did it, I was cursing. I could do the same job again in 20-30 minutes.

It was essential to have hose puller pliers.

I bought mine at harborfreight.

Randy V

You don't.

AirtekHVAC

Not to swipe from roger....but Carl makes a nice one, reasonably priced as well....it does not look stock, if that's what your after, it's not for you, but looks pretty bad *** to me....

NoVector

Two things I'd add to your shoping list: new hose that goes on the bottom of the tank (you'll never have better access) and a new gasket for the float sensor (you'll have to unscrew the sensor from the old tank and install it in the new--chances are good the gasket is toast.) I'd probably round the project out by adding a new tank cap for good measure.

If you really want to go "hog wild", remove the window cleaner fill neck so you'll have more access to move the tank around and remove hoses. For $70 you can replace that too (assuming it's crappy brown and probably cracked from the steel insert inside the fender wall.)

Good luck!

Carl Fausett

Last I heard, the OEM plastic replacement had gone up in price again.

Here is ours: http://www.928motorsports.com/parts/..._reservoir.php

I have also been told that the plastic filler necks for the windshield washer reservoir are now $100 each. I'm sorry I don't have an answer for that one.

Ducman82

washer fill neck is spendy. but once you have it, you will be happy.

jeff spahn

I bought one of Carl's tanks (well my wife did for an xmas gift for me 4 years ago). I like it. Only complaint is you can't see coolant level. Then again, why do we have a level sensor on our cars if we don't rely on it?