Got a replacement cam gear over the weekend thanks to Slits Anyone recommend the right bolts to use when putting it on the cam? I don't know how much torque they are subjected to or if they need to be a certain size to clear all the stuff inside the case. Also, is anyone familiar with the Eljin (sp?) cams that GPR sells. They are saying they can get me a little more aggressive cam that will work perfectly without changing anything on the fuel injection. Thanks
Whatever cam you buy should come with the appropriate bolts and will specify the torque.
More than likely, you will have to enlarge the holes in the cam gear to fit the bolts. Also, you will probably need to counterbore the holes in the cam gear in order to recess the bolt heads. If they stick up too high, they will hit the oil pump housing.
If you buy the cam from Web-cam, they will not tell you any of this stuff (except for the torque setting). I don't know about other mfg's.
Also, I would recommend using some red loc-tite on the cam bolts. Don't want those to come loose!!
Demick
what oil pump are you running??
The Type I Pump is the one that is most important for bolt/cam clearance....
Jake, are you saying that clearance is not a big issue when running the stock t-4 oil pump?
I was under the impression that the different size numbers indicated the distance between the splines. Wouldn't it cause a clearance or wear problem meshing with the drive gear?
The numbers indicate the size (radius) of the cam gear. There were different sizes to compensate for how the case was machined for the crankshaft position vs the camshaft position.
A -3 gear means that the radius of the cam gear is .03mm smaller than the nominal size (nominal size being a "0" gear). A +3 gear means the radius of the cam gear is .03mm larger than the nominal size. The cam gears were available in in the following sizes: -3, -2, -1, 0, +1, +2, +3
A larger cam gear will be a problem. But a smaller cam gear just means that there will be a little extra backlash between the gears. Apparantly this isn't a problem (although the appropriate size is still better in my opinion), but this is why they only make the smallest size now.
Of course, if you have your case align bored, then your original cam gear size is no longer important as the distance from cam to crank has been altered.
Demick
I have never had a clearance issue with a stock pump and an aftermarket gear, but i don't use the same gear that Web sells.. I have had them be close, but still within clearance tolerance before....
I jump straight to a Type I pump on all engines, i haven't used a stock pump in about 5 years!
Oh, I misunderstood.....
Yes, you are VERY correct!
.140 to be exact!
Just make sure you OEM gear isn't magnesium!
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