I have a 68 mustang stock 289, auto tranny, came with 2v. I installed an edelbrock 2121 performer 289 intake with an edelbrock 1403 500 cfm 4v. I used all edelbrock recommended parts, gaskets, bolts, sealers, gascasench etc. put ultra black rtv around water ports on both sides of gaskets. gaskets are not slipping because gascacinch holds very well. also used rtv across ends instead of gaskets there as reccomended by edelbrock. no leaks on ends.
I have installed the intake 4 times now and I still have water getting into my oil. A couple of these changes were because mechanics torque wrench was bad and one time we broke a bolt and next time stripped threads in one hole of the heads all due to bad torque wrench. The third time we got water leaking into oil so had to do for the forth time. I did radiator leak test, set at 15 lbs. and it leaks down a couple pounds slowly after maybe 20 minutes with engine off. I always tightened using edelbrock suggested sequence. this last time i tightened by hand instead of torque wrench. and retightened a quarter
turn after a few hours.
the first install we used regular bolts and snapped one due to bad wrench. the second time i used edelbrock bolts and it leaked water into oil so took it off again and in taking out the edel bolts found one bolt had loosened up because it was shorter than the other 11. this was defective bolt set from edel. the bolt caught just enough to torque down but not enough threads
to hold under pressure and heat. then when we reinstalled we stripped threads from head due again to bad torque wrench. pulled intake back off fixed problem and reinstalled using hand tightening and it still leaks water into oil
i would not think it likely that i have cracked head or bad head gasket since i had no problems before the changeout from the 2v to 4v.
I’m paranoid after all the problems now. i have ordered a new intake and will replace one more time using brand new torque wrench. but would like to make sure it works this time so does anyone have any thoughts on what i can do to insure success? if it does not work this time i will have to put old 2v back on or sell the car as is and loose a ton of money on it.
All thoughts and suggestions are appreciated.
I have installed the intake 4 times now and I still have water getting into my oil. A couple of these changes were because mechanics torque wrench was bad and one time we broke a bolt and next time stripped threads in one hole of the heads all due to bad torque wrench. The third time we got water leaking into oil so had to do for the forth time. I did radiator leak test, set at 15 lbs. and it leaks down a couple pounds slowly after maybe 20 minutes with engine off. I always tightened using edelbrock suggested sequence. this last time i tightened by hand instead of torque wrench. and retightened a quarter
turn after a few hours.
the first install we used regular bolts and snapped one due to bad wrench. the second time i used edelbrock bolts and it leaked water into oil so took it off again and in taking out the edel bolts found one bolt had loosened up because it was shorter than the other 11. this was defective bolt set from edel. the bolt caught just enough to torque down but not enough threads
to hold under pressure and heat. then when we reinstalled we stripped threads from head due again to bad torque wrench. pulled intake back off fixed problem and reinstalled using hand tightening and it still leaks water into oil
i would not think it likely that i have cracked head or bad head gasket since i had no problems before the changeout from the 2v to 4v.
I’m paranoid after all the problems now. i have ordered a new intake and will replace one more time using brand new torque wrench. but would like to make sure it works this time so does anyone have any thoughts on what i can do to insure success? if it does not work this time i will have to put old 2v back on or sell the car as is and loose a ton of money on it.
All thoughts and suggestions are appreciated.