ZR-1 Net Registry Forums - View Single Post

WVZR-1 · 07-16-2014

"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.

07-16-2014	#10
WVZR-1 Join Date: Oct 2004 Posts: 1,884	Re: Leaking Coolant Overflow Cap "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. Last edited by WVZR-1; 07-16-2014 at 05:56 PM.