I was puting on a timing gear and on the cam gear, it is notched out for a keyway, but I have a dowel. I want to degree my cam, but I am not sure how to do it. Is this supposed to be this way. Does anyone have any pictures of how this is supposed to look factory or with the cam bushings? Thanks in advance for all answers

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We need to know the model/year of your motor. Sounds to me like you're trying to put a flat tappet gear on a roller cam (LN2).




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it is a 94 cavalier with the 2.2 engine. Sorry

OHV notec wrote:(fill out your profile)
We need to know the model/year of your motor. Sounds to me like you're trying to put a flat tappet gear on a roller cam (LN2).

Ok now that I stated what type motor I have a took some pics to make sure it was correct. The flat tappet timing gear will not fit at all. I still have it but also bought the roller timing gear. I was wanting to make sure this was the correct gear as the camshaft has a dowel and not a keyway...

Sorry for the poor pic quality above. It was took with a cell phone. I have someone coming tomorrow night to make help me finish the motor... Could someone chime in so if it is wrong, I can hopefully get the right part before then??? Thanks in advance

ttt...

That gear obviously is designed for a key, not a dowel. I'd use the proper gear to prevent troubles, if I were you.


Go beyond the "bolt-on".

I have tried several different brands. Do you have any pics or ideas on how to get the correct one?

Anyone? Anyone...?

Bueller?


Go beyond the "bolt-on".

That is how the stock replacement gear fits. Judging by the size of the center hole, that's a hydraulic roller cam.

The older flat tappet hydraulic cams used a smaller center.

The oldest, the '84 1.8L used a true roller chain. These have to have the center machined to fit the hydraulic roller cams. This conversion is the one you would need to use if degreeing the cam. You would need to replace the stock LN2's cam dowel pin with a 1/4" dowel pin from a SBC and drill out the pin hole on the cam gear and use cam degree bushing kit for SBCs.

I have a factory gear here from a roller cam (is that what you mean by stock replacement?) and it also has the square hole for a round peg syndrome. The front of the gear reads "GM10198810." Use it, and have a nice day.

Strange, but the double roller chain gear (DRCG) appears to have the same distance from front of gear to thrust surface on the back as the later roller cam gear (RCG). The ID of the recess designed to fit over the nose of the cam in the DRCG is just a few thousandths larger than the OD of the raised portion of the back of the RCG. The RCG fits perfectly into the DRCG so the two thrust surfaces will contact each other. When placed like this, the cam dowel holes align. What this tells me is it's not necessary to machine the cam to use the older gear. A simple bushing should fit the bill nicely.

Fat Mat, there probably are a few other ways to skin this cat. Offset crank keys will allow you a couple of degrees of movement and are probably the easiest answer for a small amount of change. SBC guys use 'em all the time. Next easiest might be to machine a new keyway in the crank or cam gear.

hth
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