I posted a week or so ago and said that my car wouldnt start after installing my stage one comp cams with the special tool.....Well the mechanic says that My ecotec is an interferance motor and that the cams had to be put in wrong..He also said that by putting them in wrong I bent valves...He said because it is an interference motor the pistons were coming up and hitting my valves , thus bending them....Does this sound legit and has it happen to anyone....and if so how hard /long to fix???
if he said that he had to put them in wrong and he knew it was an interference engine then he knew that it would bend valves before he tryed to start it and i would say that its his fault that they bent
it is an interference motor.
but timing it only 1 tooth off will not bend the valves.
more than that will probably bend them though.
as said before, compression test.
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protomec wrote:it is an interference motor.
but timing it only 1 tooth off will not bend the valves.
more than that will probably bend them though.
as said before, compression test.
X2
this is also why you ALWAYS turn the motor over by hand before trying to start it. If who ever put the cams in would have done that like they should have you wouldn' be sitting there with bent valves.
do a compression test an dpost the results... otherwise we cannot help...
and make sure when you do the compression test, you have the person who is cranking the motor over hold down the gas peddle all the way so you get the right reading...
and redo the timing before you compression test...
if you put them in wrong, then you most likely bent a valve or more..
according to gm no less than 100psi per cylinder. For a good engine it should be 150+psi / cylinder no cylinder should be 10% less than any others. so if your highest is 150, lowest should be 135. They should all be really close. On my new engine, throttle body closed had 150->153 accross the board.
-Chris
