- Joined
- Dec 8, 2014
- Messages
- 94
- Reaction score
- 0
- Location
- Miramar Beach, FL
- My Car
- 1973 Mustang Convertible
H Code 351C
Ok, I have pulled, cleaned and reinstalled my intake manifold and was extremely careful and meticulous.
However, I still seem to have a vacuum leak in the same spot.
Background....
351c 2V. Engine ran great before. Carb needed a rebuild and I just decided to upgrade instead.
Installed Performer 2750 Intake and 1406 Carb.
Got it all together the first time and had a vacuum leak. So took it all apart and reinstalled. New gaskets. Gaskets were applied with Gasgacinch. RTV in valley's instead of cork gaskets.
Now I seem to have the same issue.
Can't get a constant engine rpm. If I use a little carb cleaner around intake idle jumps at same spot as last time. The apparent leak is in the middle of intake under choke. Right at the plate that blocks off the old Choke Heater Hose Assembly.
I checked torque on all bolts and all are equal at 20 ft pounds per directions. Manifold was torqued in the pattern in the intake instructions and in a two step method (10 and then 10 again).
I am really trying to do this project myself and not take it to a mechanic, but I am feeling a bit defeated.
I would have expected the leak to be near the front or back where the RTV was used.
Anyone had any ideas as to what is happening? Why I'm not getting a good seal?
However, I still seem to have a vacuum leak in the same spot.
Background....
351c 2V. Engine ran great before. Carb needed a rebuild and I just decided to upgrade instead.
Installed Performer 2750 Intake and 1406 Carb.
Got it all together the first time and had a vacuum leak. So took it all apart and reinstalled. New gaskets. Gaskets were applied with Gasgacinch. RTV in valley's instead of cork gaskets.
Now I seem to have the same issue.
Can't get a constant engine rpm. If I use a little carb cleaner around intake idle jumps at same spot as last time. The apparent leak is in the middle of intake under choke. Right at the plate that blocks off the old Choke Heater Hose Assembly.
I checked torque on all bolts and all are equal at 20 ft pounds per directions. Manifold was torqued in the pattern in the intake instructions and in a two step method (10 and then 10 again).
I am really trying to do this project myself and not take it to a mechanic, but I am feeling a bit defeated.
I would have expected the leak to be near the front or back where the RTV was used.
Anyone had any ideas as to what is happening? Why I'm not getting a good seal?