I'm having trouble making the thermostat housing from a 1990 EFI mustang fit onto my Performer RPM Air Gap Edelbrock intake. This is my 3rd attempt to fix the leak. If you look you can see that the edges don't even line up. Passenger side view This is from the passenger side view This is from the top and I'm facing the windshield taking the pic It leaks from the bottom as well as the side here. The gooey stuff is the coolant leaking out.
the tstat housing has a plate for the tstat but the intake just has an opening with no place for the tstat to sit in.
I wud contact Edelbrock and see what they have to say. I wud think they have ran across this issue B4.
i always take a file and...face..the gasket surface on the intake... does the t-stat sit all the way into the housing?
I filed the surface of the housing flat but didn't do it on the intake side. Contacted edelbrock, they didn't have any input on it.
There should be a recess area in the thermostat housing that the thermostat "sits" in. Do you still have that recess?
As the others have said, there's a recess in the T-Stat housing for the T-stat to sit in. When you go to assemble it, are you placing the T-stat into the recess, then applying a thin film of gasket sealer on everything, then placing the gasket over the T-stat onto the housing (this keeps the T-stat in place, where it belongs) then bolting the housing to the intake ? I suspect ther T-stat isn't secured into the recess, then slips out of place when you go to bolt it onto the intake.
One little trick I have used for years, is to insert a rubber band through the thermostat and out through the hose outlet to a pencil or dowel bridging the opening. Once it is bolted in place, you just slip the rubber band out. That way you always keep the thermostat seated in the counterbore.
there is a recess in the housing for the t-stat. the problem is that the bypass port in the housing is very close to the edge of the face of the intake manifold. we put the housing on a vic jr that we have and there was allot more material that goes past where the bypass port is. we also looked at my stealth intake and it has more material. it looks like the rpm air gap that mo is using just doesn't have enough material to allow the gasket to seal around the bypass port.
What about a housing from a 86-93 Mustang 5.0l? It has the 90° up elbow to clear the belts and the bypass opening might be a little farther inboard.
The housing I ordered was from that year 5.0. I'm beginning to wonder whether I have the wrong intake or wrong t-stat housing. If I can't figure it out I'll put a thin plate between the 2 and see what happens.
