88-347stroker

need advice on thermosat for 347,i was thinking 160-170

dawson1112

You need at least 180 if your efi. Other wise the ecm will stay in open loop.

88-347stroker

ok,is that why coolant runs thru throttle body

88-347stroker

and my motor wont idle with the crankcase vent line hooked up,thats the one on the back of intake

dawson1112

Coolant runs through the egr spacer not the throttle body, and it is to help keep the temps down on the air flowing through the egr spacer. The egr spacer has hot exhaust gasses passing through it , so it needs to be cooled.

The back of the lower intake is a pcv and you need it hooked up other wise you can build up to much crank case pressure and push oil out of the rear main seals as well as other oil seals. Also any oil vapor that escapes from the pcv outlet in the back will eventually coat your nice shiney engine and it will look like hell. The crankcase vent should be on the valve cover/oil filler neck and connect to the throttle body before the throttle plate or it can hook up to the air intake tube someplace.

If it wont run with the pcv line hooked up something is not hooked up right

88-347stroker

ok hooked up coolant lines and they are leeking into upper intake,the vacuum is actually sucking the water from the cooling system,so I unhooked the and now have to change oil and repair egr spacer

88-347stroker

I did hook up pcv on back of intake and adjust idle so that is done

dawson1112

You can use some rtv on the egr spacer both sides along with the gaskets. A lot of pple have experienced the egr spacer leaking coolant .

88-347stroker

I will try that when i get home,but i did order the bbk 75mm egr spacer that goes with my throttle body

88-347stroker

took it apart ,you are rite the 75mm tbody did not match for **** to the 55mm,so I am cleaning everything up and wait on new prts,have to flush motor out will pick up supplies tomorrow