Devinb

So i turn the car on and let it warm up then i turn the heat on and it starts to blow nice and warm. Well after a few minutes it will turn to cold air. It will then just go back and forth from cold to hot air, without me touching anything on the temp. control.

Does anyone know what would cause this. I thought something blocking the system maybe?

Billman250

Low coolant/air in the system.

ihiryu

yeah it needs to be bled. mine was doing that for awhile, but apparently i wasn't bleeding the system right

Devinb

how would i properly go about bleeding that. just drain everything and refill?

Seattle2k

hellspare

Yep my car had that problem right after a motor swap too. The shop drained some of my coolant and forgot to fill it.

Do a flush and you should be golden.

Suzukuh

This is the one I used.

http://forums.s2kca.com/showthread.php?t=12152

Billman250

Whatever you do, dont follow that procedure from the book. you will overheat the car for sure.

I have posted my bleed procedure a few times.

Boost76

X2.. happened to me. I just bled it on an incline & BAM hEAT!

Seattle2k

Why is that?