this could also happen if whoever put it together mixed up the cam caps or the head was warped.that would cause drag on the cam and it would eventually cause the cam gear bolt to loosen and shear the pin
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5/24/09 9.30@154
i would be leaning to install erorr. with only 2 problems out of all the parts they sell and make . btw most shops will tell u a certain part caused a problem to cover up something and just because it may seem right to a person that has no real mechanical skills with cars . i have friends that have had shops tell them that their new built engine failed from a bad 02 sensor even on a totaly stock evo. i have never seen shady shit like that till latly with speed shops
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stage 3 fm 44lb wheel ,boltons, aem f/ic , maxxfab see, bc stage 2 cams, lots more tuned by Aaron@realtune
ok i had the cam pin shear off on me, but my issue was NOT the cam as you are claiming happened to me, my problem was that my lash adjuster collapsed, causing my rocker arm to get lodged in between the lobe and spring. the engine kept turning and the pistons came up and bent my valves, again my problem was NOT the cam, i got a replacement cam from them and i will continue to run them
so there you go one guy with the problem .. to the op i would be looking at the shop if it were me
and i know the other guy personally, and his problem was that they didnt tighten the cam bolt enough and it spun on its first start up, so it was shop error, ask the shop what they tightened the bolt to, it should be 85ftlbs
About time we're all convinced it was install error and not the cam .
I've had BC3's and no complaints. I've also installed a cam in my 1st gen that didn't even have a cam pin on it anymore, so I KNOW the pin sheering off wasn't the problem .
yea i have been a mechanic for years and maybe that hasnt helped the fact that i trust no shops. 85% of them see quick money and dont want to take a loss by fessing up for a mistake they made so they blame a part
yea i have been a mechanic for years and maybe that hasnt helped the fact that i trust no shops. 85% of them see quick money and dont want to take a loss by fessing up for a mistake they made so they blame a part
yea i built my engine as well, that way if i blow it then i dont have to kill anyone
I've seen one case with some Crane cams where the pin sheared off, resulting in similar engine damge...but it was because the cam seized in the head due to oil starvation! Needless to say, the whole engine was toast at that point!
ok, cam pins were all in place, motor was in exacty time when if came back to pfi nothing out normal, all bolts tight on the cam gears. only failure was a broken intake vavle on the #1cyl. this was after 1500mi of driving it. these are the same cams,springs,retainers,valves, pistons, assembly that i have ran many 10 sec passes on with a 37r. I dont know what to tell you or what happened to the car i only have the facts which jt said happened to the car and the condition that it came back in. i tore it apart personally. I will tell you that the cams did not cause the problem. One of the pins did shear on the other intake cam we had in the car with no damage done. We mic'd the journal and bc verified it was the wrong dia. but in this case of the broken motor it is beyond anything i can tell you
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