Heater Core Repair or Replace?

[HAWAIIZR-1]

Originally Posted by GOLDCYLON

Cliff is the man !!!!! His solutions have saved many a ZR-1 owners time and given them the knowledge to take the projects on.

I could not agree more with GC!! The info he has put together cannot even be put into words. I know I cannot thank him enough.

Cliff,
Since you have several years of Zs, have you needed to do the 95 and will it be any different if not removing the dash? I was going the cheater route this weekend and doing a bypass. I thought eventually I would repair when retired as I just dread this more than pulling the motor and installing new cams. Thank you. If I were still in Hawaii I would just bypass and forget it, but it would be nice to have heat here in Japan.

[Dynomite]

Originally Posted by HAWAIIZR-1

Cliff,
Since you have several years of Zs, have you needed to do the 95 and will it be any different if not removing the dash

My Heater Core on 1990 (#3032) started leaking on floorboard passenger side So.......had to remove some carpet to get rid of antifreeze smell and just worked up under the passenger side dash (had been there before removing the CDM in another 1990 ZR-1).

I am assuming the 95' would be very similar.....except the CDM on 1995 is behind passenger seat

I did pull the passenger seat before pulling the heater core on a 1990 ZR-1

[secondchance]

Hey Cliff,

I have yet to read your write up on removing the heatercore but when I did a 92 Wazoo car, only thing I can think of to avoid pulling the dash was cutting the heater core inlet and outlet and splicing the inlet and outlet to a new heater core.
I ended up removing the dash and the whole thing took about 8 hours. At the end I was left with a plastic tube about the size of my thumb and three 7mm screws. I think the plastic tube probably was a connection to side window defroster vent on the edge of the dashboard.
Having replaced the heatercore once, I have been religious about replacing the coolant every two years.

[HAWAIIZR-1]

Originally Posted by Dynomite

My Heater Core on 1990 (#3032) started leaking on floorboard passenger side So.......had to remove some carpet to get rid of antifreeze smell and just worked up under the passenger side dash (had been there before removing the CDM in another 1990 ZR-1).

I am assuming the 95' would be very similar.....except the CDM on 1995 is behind passenger seat

I did pull the passenger seat before pulling the heater core on a 1990 ZR-1

Hey Cliff, Thanks for the reply. In theory it should be easier then without CDM there, but probably replaced with some other crap. I guess only one way to find out. I?ll take a peek under there when I install my stereo in a few weeks. Wish me luck.