CrazyLT1

Hey guys,

I am changing my optispark today, and was wondering if there was a way to measure the legnth of the cam dowel pin while the cam was still in the car. Car is a 1997 so the length matters. I think my opti failed pre-maturely so I want to check it.

Is there a way to measure this legnth without removing the cam? And how long should it be?

bmwmcars

maybe something like a tire tread depth gauge? or a set of calipers....

DirtyDan

There are plenty of calipers out there that could measure it for you. Just find somebody that works with lathes or in a machine shop.

94_PatriotRed_Z

I have heard of people putting alittle bit of grease or clay in the opti and put the opti up there, then see how much of an indentation the pin made into the clay

hogs

How far should the pin go inside the opti is 100/1000 enough? or??

shoebox

It should probably go at least halfway into the slot. Two-thirds might be be better.

hogs

So lets say if the pin Sticks pass the 3 cam bolts about 100/1000 that wd be enough to go into the opti??

shoebox

Impossible to say, because you don't know how close the opti drive comes to the face of the cam gear. Just mock it up with clay already.

hogs

OK but I have heard from respectful enigine builders just double checking that as long as it comes out pass 100/1000 pas the bolts thats more than good enough... Thats why I was asking...Anyone else agree to this?

shoebox

The way to measure it is from the face of the cam.

hogs

YEs I did know that thanks for the input I was just checking the other way.. Mine is about .620 from the face...

So that should be more than good enough to go with ?

Thanks

shoebox

My stocker was ~ .650", but your should be ok.