There's an "O" ring that seals a hard pipe which feeds the heater core, that is pretty EZ to bugger up on re-assembly. IIRC you have to remove the manifold in which it's contained, which is aft od the thermo manifold itself, to get to the thermostat. Get a replacement before you start, & be CAREFUL on re assembly, as you won't know it's buggered until you're adding coolant after it's all back together...
Ask me how I know....
The common chamber (intake manifold) torque values have ALL been revised to 13 ft/lb.
I'll do some digg'n tomorrow, to see if I can get you a part# for the "O" ring, as I know I have one left in tha inventory. Also, I'll never make that connection again without a little spooge of black RTV...just in case...![]()