it might be that the cam is hitting the valves hard enough that the tapping noise is them closing on the seats
it might be that the cam is hitting the valves hard enough that the tapping noise is them closing on the seats
shouldnt realli do that much harm
With a 270 degree camshaft even if the head is excessivley skimmed it shouldnt touch the pistons if the cam is timed up correctly! Sounds like you will have to recheck the timing and if its ok the head may have to come of again!
Do you have a compression tester?
Chris
what should it read on the compression tester?
i used to get 220psi on my old 1.6 8v, standard they measure between 150-180
Chris
rallyman - did you do anything to your bottom end eg new rings at the moment i have got an astra bottom end with 52 000 miles on it, and did you have any problems with your bottom end eg knocking or piston slap cheers mike
i used my engine fine without any problems/noises e.t.c. for 7 months, then i built another engine with no problems either!
The engine did have new rings, bearings e.t.c. but not new pistons.
Chris
does it affect your engine running to much psi?Originally Posted by rallyman
a compression gauge will not tell you your compression ratio! it will merely tell you if youve got good bore seal, good valve seal, cold/hot air etc
Did i say it would tell you your compression ratio???, your compression ratio is only theoretical anyway, your actual compression is tested with a compression tester, your actual compression is what counts at the end of the day! If you have low cylinder pressures hen the compression isnt to high!
Chris
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