coolant leak under pass side dash - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Low87 · 08-15-2011, 03:21 PM

I've got coolant leaking from under the passenger side dash. If I fill the radiator, it will leak down to the level of the hose that runs from the top of the radiator to the firewall. This coolant leaks out under the dash, across the floor and out under the pass door.

I plan on replacing the heater coil, is there anything else I should look at?

tucsonjwt · 08-15-2011, 04:19 PM

Nope, AFIK, that is the only coolant item in that area.

juiceman650 · 08-15-2011, 04:26 PM

Yeap,that's about it.
Posted via Mobile Device

Goldfinger · 08-15-2011, 10:04 PM

That happens all the time with a clogged or damaged heating core. Depending on the shape of all your hoses i'd replace them while i was at it

tucsonjwt · 08-15-2011, 10:51 PM

Get a copper heater core, not an aluminum (usually aftermarket) one. If you can just hook the hoses together temporarily and wait a while, I would price a genuine GM/ AC Delco copper core from one of the online vendors. If it is not too much, I would go with OEM. This is one of those PITA jobs you don't want to do again if you don't have to, especially if you have A/C.

08-15-2011, 03:21 PM	#1
Low87 been here longer than Liz Join Date: Feb 2000 Location: Broken Arrow, OK Posts: 2,437	coolant leak under pass side dash I've got coolant leaking from under the passenger side dash. If I fill the radiator, it will leak down to the level of the hose that runs from the top of the radiator to the firewall. This coolant leaks out under the dash, across the floor and out under the pass door. I plan on replacing the heater coil, is there anything else I should look at? __________________ ~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin

08-15-2011, 04:19 PM	#2
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Re: coolant leak under pass side dash Nope, AFIK, that is the only coolant item in that area.

08-15-2011, 04:26 PM	#3
juiceman650 Registered User Join Date: Jan 2011 Location: San Bruno, CA. Posts: 348	Re: coolant leak under pass side dash Yeap,that's about it. Posted via Mobile Device

08-15-2011, 10:04 PM	#4
Goldfinger Registered User Join Date: May 2010 Location: laurel hill Fl Posts: 645	Re: coolant leak under pass side dash That happens all the time with a clogged or damaged heating core. Depending on the shape of all your hoses i'd replace them while i was at it __________________ 1985 C10 Custom Deluxe LWB 305/700r4 [ Goldfinger ] 1999 k3500 crew cab dually 6.5tdi/4l80e

08-15-2011, 10:51 PM	#5
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Re: coolant leak under pass side dash Get a copper heater core, not an aluminum (usually aftermarket) one. If you can just hook the hoses together temporarily and wait a while, I would price a genuine GM/ AC Delco copper core from one of the online vendors. If it is not too much, I would go with OEM. This is one of those PITA jobs you don't want to do again if you don't have to, especially if you have A/C.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.