Leaking Coolant Overflow Cap - Page 2 - ZR-1 Net Registry Forums

gbrtng · 07-16-2014

Eric, it appears there is way too much coolant in the tank. My 91 shows "full" in the dipstick with about 1" of coolant. Somebody get him the correct cap ...

PhillipsLT5 · 07-16-2014

Quote:

Originally Posted by WVZR-1

"bdw18_123" is referencing the coolant "surge tank" up above the evaporator/heater module at the windshield.

The level indicator of your cap is missing and I'd think that likely provided the "escape route" for your coolant! Look at the coolant cap I linked to in an earlier post. That is what should be there.

The link now only goes to CC home page so enter any of these part #'s in the search block: 10239665, 244412 OR 14069687.

My cap has the stick and then it has 3 less than 1/8" holes for venting. Mine would have been new from GM in '03 I believe. If you want a non-vented cap with a gasket the cap from my '03 SSEi is a fit with a gasket but it does say "DEXCOOL". I believe most any cap on the GM dealer shelf would likely be a fit from anywhere in the '90's to maybe later.

Correct

bdw18_123 · 07-17-2014

Oops, wrong coolant tank, lol! Forgot about that one...

But yeah, WVZR-1 is correct, there is supposed to be an indicator stick where that hole is in your cap, so that is undoubtedly where the coolant is leaking out from.

Paul Workman · 07-17-2014

Quote:

Originally Posted by bdw18_123

Oops, wrong coolant tank, lol! Forgot about that one...

But yeah, WVZR-1 is correct, there is supposed to be an indicator stick where that hole is in your cap, so that is undoubtedly where the coolant is leaking out from.

Yep. The caps on our 90 and 91 look like this...

And, there appears to be some barrier material sandwiched under the 3-hole blister and the vent hole on the top of the cap.

emmvette · 07-17-2014

Thanks guys, I ordered one from C. Central today. It helps knowing what it is supposed to look like!

PhillipsLT5 · 07-17-2014

Its a dipstick, cold & hot markings

07-16-2014	#11
gbrtng Join Date: Feb 2006 Location: San Antonio area Posts: 1,179	Re: Leaking Coolant Overflow Cap Eric, it appears there is way too much coolant in the tank. My 91 shows "full" in the dipstick with about 1" of coolant. Somebody get him the correct cap ... __________________ “Buy the best example of what you want, and pay whatever it takes. That way, you cry only once.” ~ Bruce Meyer

07-17-2014	#13
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 809	Re: Leaking Coolant Overflow Cap Oops, wrong coolant tank, lol! Forgot about that one... But yeah, WVZR-1 is correct, there is supposed to be an indicator stick where that hole is in your cap, so that is undoubtedly where the coolant is leaking out from. __________________ [IMG]http://i13.photobucket.com/albums/a292/bdw18_123/_zr1netforumsigphoto.jpg[/IMG][B] 1990 Corvette ZR-1 [/B][I] White/Flame Red, #2299, mostly stock, 144K miles.[/I] -Cams timed to the '93-'95 405HP LT5 stock timing. -IAT sensor relocated to below front bumper. -Haibeck hoops installed in airduct. -OBX cat-back exhaust. [COLOR=DarkRed][B](SOLD - December 2012 [/B][/COLOR][COLOR=DarkRed][B]:hello:)[/B][/COLOR] 1993 Corvette Coupe Black/Black, 6-speed (SOLD - October 2009 :hello:)

07-17-2014	#15
emmvette Join Date: Jul 2013 Location: Central Iowa Posts: 190	Re: Leaking Coolant Overflow Cap Thanks guys, I ordered one from C. Central today. It helps knowing what it is supposed to look like! __________________ [CENTER][SIZE=4][COLOR=red]1990 ZR-1 Red / Red[/COLOR][/SIZE][/CENTER]

07-17-2014	#16
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,452	Re: Leaking Coolant Overflow Cap Its a dipstick, cold & hot markings