I'm not new to assembling the 7mgte, but I can't figure this one out. Sometimes I do stupid mistakes and then it dawns on me but here is what I have. I took the head off the motor to install BC springs, retainers and 272 cams. I reinstalled the head with my HKS stopper headgasket with copper spray. This isn't the first time I reused it. I installed BC 272 cams. and reshimed the valves. I set the crank to zero and installed the cam gears with the marks pointing up. (I actually set them to -3 and +1).
I tried starting it, cranks but no start. I check for fuel, yup, spark, yup, triple checked the cps, yup. Last I check for compression which I thought I obviously had. I have 0psi on all 6. i was able to get 9psi once out of my 25 tries or so.
I was very careful not to rotate any valves when installing the springs. No valves were even removed.
I rechecked the shim clearance on a few of them. Good, so the cam isn't holding the valve open.
The aftermarket cams "appear" to have the lobs pointing in the same general direction as the stock cams.
I used 3 people to install the headgasket. 1 person used a flashlight to make sure the head landed on the dowels.
The dowels on the cams are in the middle of the 3 holes.
I connected an air compressor to the spark plug hole. I do hear some leaking internally but sounds normal to me. Slowly leaking past the rings I assume. But nothing appears to be leaking outside of the motor at the headgasket.
The engine sounds the same when cranking with and without the spark plugs in...it has that "compression test cranking sound" when the motor is fully assembled.
I see the cams turn. I know the pistons are moving because I put a straw in the spark plug hole.
Fully build motor with about 2000 miles. Zero compression.
Any ideas?
Dennis
I tried starting it, cranks but no start. I check for fuel, yup, spark, yup, triple checked the cps, yup. Last I check for compression which I thought I obviously had. I have 0psi on all 6. i was able to get 9psi once out of my 25 tries or so.
I was very careful not to rotate any valves when installing the springs. No valves were even removed.
I rechecked the shim clearance on a few of them. Good, so the cam isn't holding the valve open.
The aftermarket cams "appear" to have the lobs pointing in the same general direction as the stock cams.
I used 3 people to install the headgasket. 1 person used a flashlight to make sure the head landed on the dowels.
The dowels on the cams are in the middle of the 3 holes.
I connected an air compressor to the spark plug hole. I do hear some leaking internally but sounds normal to me. Slowly leaking past the rings I assume. But nothing appears to be leaking outside of the motor at the headgasket.
The engine sounds the same when cranking with and without the spark plugs in...it has that "compression test cranking sound" when the motor is fully assembled.
I see the cams turn. I know the pistons are moving because I put a straw in the spark plug hole.
Fully build motor with about 2000 miles. Zero compression.
Any ideas?
Dennis
