Coolant leak from somewhere....

Big Dawg · May 22, 2024

Big Dawg said:
I pressure tested the radiator today.....would only get to about 10psi and than start losing pressure. The coolant was leaking from the both of the hoses coming from the heater core on the firewall. I have the hose and heater check valve on order should be here any day, also I took the thermostat housing off and cleaned it up and have it ready to go back on when the permatex comes in with the rest of the stuff. I have a question right now there is a 180° thermostat in there, I was thinking should go with the 160° ? While I have it all apart.

Are there pre bent hoses for the replacements or do I just cut to fit the 5/8 hose I ordered. One of the coolant hoses that is coming out of the heater core pipe has a big bend.I just don't know if the pipe I ordered will get a kink in it......we will wait and see what happens.

Do you guys run a gasket only or permatex or both on the thermostat housing? I have a 180 fan switch setup for the electric fans, if I switch the thermostat should I switch out the temp switch to 160 as well?

Thank you for all tour help guys.

SCOOBY DOO · May 24, 2024

I THINK these are the ones you're looking for...and great people to deal with.

Heater Hoses Molded - Complete Set w/bypass hose & clamps

No cutting required for this Buick Regal Grand National heater hoses hose set from Highway Stars

www.highwaystars.net

SCOOBY DOO · May 24, 2024

If you have Erics chip in your car just throw a 160 thermostat in it and call it a day.

Big Dawg · May 26, 2024

SCOOBY DOO said:
If you have Erics chip in your car just throw a 160 thermostat in it and call it a day.

Perfect thanks, picked one up. Ordered the hoses from highway stars as well. I may still need to find 1 or 2 that are different in a 1985 Hot Air. Thanks Scoob

Big Dawg · Wednesday at 9:58 PM

Okay, I'm in a bit of a pickle here.....so i ordered the Highway Stars heater hoses. Only 3 of them I can make work, and few of the others I used some new 5/8 coolant hose. Now I am left with the following 2 molded hoses that I am having a difficult time finding, even from another application.

Now my question to you guysbout there with the Hot air turbo Buicks, what did you use to replace the 2 hoses.

Here are a couple of pictures of the hoses I am looking for....they are 3/4" ID. As you can see the highway star molded hose is a lot smaller than the stock one that came off my car.

Thanks guys,