Anti-freeze Is Leaking In The Cab

[K-5krazy]

In my 87 K5 Anti-Freeze is leaking inside of my cab right under the glove box. The truck started to leak when I turned on the heater. Then it would leak when I turned on my vents. Now its gotten to the point where it leaks all time and it gets worse the harder I press on the gas, plus my thruck is starting to over heat if I dont add water. I think its leaking from some part of the heater or has somthing to do with the heating systemin the truck. What can I do to fix this problem and what exactley might be the cause this leaking problem.

 

[Can Can]

You've got a cracked heater core. A step-by-step guide to R&R your heater core can be found here:

http://coloradok5.com/heatercore.shtml

Good luck, brother!!!

 

[K-5krazy]

Oh sweet thats not to bad thanks for your help

 

[1985_K5_Silverado]

The part is pretty cheap, which is always a good thing.

 

[Can Can]

thanks for your help

No problem, brother. That's what CK5 is all about!!!

 

[79k20350]

hold on a sec...it might not be...this happened to me to... Make sure to check the hoses. one is 3/4" and one is 5/8". sometime people will replace them and not realize theres a differance(run 3/4" for both) and the hose wont seal and it leaks right into the cab. ask me how i know

 

[savagek5diesel]

my heater core cracked also a while back, same analysis as you gave, Except during dead winter and i never checked my passenger floor, always wondering why my truck was getting steamy inside.... derr de derr. Honestly, replacing the heater core was a b****. Could have been the 35* temps outside working at night in the dark, but i do remember hammering, cursing, and breaking bolts purposely just to get the thing off the firewall. Good luck man, and if your not afraid to take your pass. fender off, do it, it will make things easier.

 

[k5blazin]

That write-up helped me alot on my first heater core replacement.. now ive done 2 more without a problem!