So yea...there really is a difference...92 / 93 crank cog / cams

[Mean Green]

So I've talked to many people about this and everyone who I have talked to says "No, there is not a difference between the cogs other than the 93 having the fins for the sensor. Well, this is for you guys, fucking asshats.

There is a difference, a 1 tooth difference. The one with the fins is obviously the 93 cog. This also means that unless you cannot run mixed cam's like I was told unless you offset the mixed one. I ran a 92 intake cam and a 93 exhaust cam because my 93 intake cam had broken. Upon doing a compression test, my numbers where really high and I did not know why, well, here is a side by side comparison. Now the question is that now that I have 92 cams, do I offset it to match the 92 alignment, or do I align it to the 93 spec? I am assuming that I need to run it according to the 92 spec but I rather be sure.

http://i101.photobucket.com/albums/m74/nismo200r/Picture026.jpg
http://i101.photobucket.com/albums/m74/nismo200r/Picture027.jpg
my crank cogs where injured in this test...

[Mean Green]

"Now the question is that now that I have 92 cams, do I offset it to match the 92 alignment, or do I align it to the 93 spec?"

anyone...lol?

[colt45 gto]

the marker indicates TDC on the crank. the markers on the cam indicate TDC for them also. so use the cogs to match the part. 93 crank, 93 cog.

[Mean Green]

the marker indicates TDC on the crank. the markers on the cam indicate TDC for them also. so use the cogs to match the part. 93 crank, 93 cog.

Yea that's what I was thinking...but...considering I've been up for a very very long time, I don't trust my sleepy judgement...lol

[RL7]

So, the wd-40 straw is pointing to the marked tooth in the first pic and the same tooth (not marked) in the second? Weird. I'm thinking the timing mark on the engine probably had to be in a slightly different place on 93+ for some reason (crank angle sensor?). I would say just use the crank sprocket that matches your engine generation and line everything up. This probably was never noticed because there aren't many scenarios where you would want to use a crank sprocket other than the one that came on the engine. What year is the engine block? Why did you use a different crank sprocket?

[1stStealthN/A]

Just find TDC with a dial indicator on #1 piston and remark the spot, which is exactly one tooth to the left of the oil pump timing mark.

http://www.wrenchmonkey.com/Webpages/4boltModified.html

[Mean Green]

I was more worried about the fact that I have all 92 cams now in a 93 engine...I was tired as fuck but it's covered now..lol