ok heres the deal: I have a 1993 mustang LX 5.0 HO automatic, I decided in the begining of spring to slap on a set of ported and polished factory heads with 560 lift springs stock valves with a five angle valve job done to them and an F303 cam I got real cheap.
the engine already had GT40 intake, 24 lbs injectors, 65mm throttle body, 73 mm maf, mac shorty headers and 1.72 roller rockers (non adjustible pedestal mount) no cats and a set of flowmasters on a stock AOD / converter and 327 rear gears. I sent the heads to get checked for leaks and cleaned up and proceeded to install my 1.72 roller rockers and installed the cam. upon puting everything back together I used engine head set part no. FELHS9280PT and bought new head bolts part no. ARP154-3601 and lightly coated the headbolts with permatex white thread sealer and tightened the headbolts to 65 lbs per the ARP instruction sheet provided. I tightened the lower intake bolts to 24 lbs witha dab of permatex T.S as well for good measure.
all went well with timing and startup until I noticed the temp gauge reaching overheating and the lifters where still ticking well after the time they should have pre=loaded. when I run a radiator pressure test I notice pressure drops and I remove the oil drain plug and find water pouring out. I dont have a compression testing gauge so I decided to try my luck and change out the lower intake gaskets out but to no avail, has to be a head gasket. My question is what did I do wrong here? was it the gasket choice or the headbolt torque down or the wrong thread sealer and also the excessive rocker noise, could it be the 3 shims that I re-used from the old stock setup?
any advise would be quite helpfull here
the engine already had GT40 intake, 24 lbs injectors, 65mm throttle body, 73 mm maf, mac shorty headers and 1.72 roller rockers (non adjustible pedestal mount) no cats and a set of flowmasters on a stock AOD / converter and 327 rear gears. I sent the heads to get checked for leaks and cleaned up and proceeded to install my 1.72 roller rockers and installed the cam. upon puting everything back together I used engine head set part no. FELHS9280PT and bought new head bolts part no. ARP154-3601 and lightly coated the headbolts with permatex white thread sealer and tightened the headbolts to 65 lbs per the ARP instruction sheet provided. I tightened the lower intake bolts to 24 lbs witha dab of permatex T.S as well for good measure.
all went well with timing and startup until I noticed the temp gauge reaching overheating and the lifters where still ticking well after the time they should have pre=loaded. when I run a radiator pressure test I notice pressure drops and I remove the oil drain plug and find water pouring out. I dont have a compression testing gauge so I decided to try my luck and change out the lower intake gaskets out but to no avail, has to be a head gasket. My question is what did I do wrong here? was it the gasket choice or the headbolt torque down or the wrong thread sealer and also the excessive rocker noise, could it be the 3 shims that I re-used from the old stock setup?
any advise would be quite helpfull here