JMX cam install suggestion
JMX cam install suggestion I just got done my TREX install and found a little trick people may want to try that I didnt see in the install notes (Which were AWESOME!!!).
Here is the trick to help lining up "DOT TO DOT"
Once you remove the timing cover, prior to taking off the cam gear, remove the spark plugs so the engine is easier to turn over by hand then line the dots up so you make sure it is lined up 100% before you take the gear off. Plus you get to see what lined up really looks like. Very nice to have them lined up 100% then take the cam gear off, pull the cam, put the new one back and the crank gear is already straight up and you are positive of that.
Again just an idea that made the dot to dot issue not even a worry, hell I had no PtoV problems doing it that way with the TREX and it took my 2 minutes to get the dots lined up because the crank gear was already correct.
Mike
Here is the trick to help lining up "DOT TO DOT"
Once you remove the timing cover, prior to taking off the cam gear, remove the spark plugs so the engine is easier to turn over by hand then line the dots up so you make sure it is lined up 100% before you take the gear off. Plus you get to see what lined up really looks like. Very nice to have them lined up 100% then take the cam gear off, pull the cam, put the new one back and the crank gear is already straight up and you are positive of that.
Again just an idea that made the dot to dot issue not even a worry, hell I had no PtoV problems doing it that way with the TREX and it took my 2 minutes to get the dots lined up because the crank gear was already correct.
Mike
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That's an even better method than mine: I just took off the cam gear and chain, then turned the crank until the crank gear dot was straight up, installed the cam gear and chain, and then rotated the crank 360* to make sure the dots lined up, but it's a lot more work than your thinking ahead method.
I think it's common knowledge to do that before removing a cam. If you don't, then you have a chance of installing the cam 180* off since the dot on the crank gear will be on top twice (once for #1 TDC compression stroke, once for #1 TDC exhaust stroke).
You're right though, if its not in the install guide it SHOULD be. A lot of people use that.
You're right though, if its not in the install guide it SHOULD be. A lot of people use that.
The install guide say to rotate the crank after you have removed the old cam and gear and already reinstalled the new cam. The 180° out is the second reason why I suggested it after just seeing the dots lined up.
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Originally Posted by 1fastWS6
I think it's common knowledge to do that before removing a cam. If you don't, then you have a chance of installing the cam 180* off since the dot on the crank gear will be on top twice (once for #1 TDC compression stroke, once for #1 TDC exhaust stroke).
You're right though, if its not in the install guide it SHOULD be. A lot of people use that.
You're right though, if its not in the install guide it SHOULD be. A lot of people use that.
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Let me clarify, if I need to, since I just removed the cam gear and chain, then the cam, put the new cam in, and then just rotated the crank gear until it was straight up, and then aligned the cam gear dot with that, I could be 180* off? Is there a way to check. My car is still apart, so I need to correct that now before moving onto the springs.
Thanks.
Thanks.
Trending Topics
The cam determins if the crank is at the top of compression or top of exhaust. As long as the crank dot is up and the cam dot is down, it will be phased correct. Doesn't matter how many times you spin the crank.
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Verdad Gallardo TECH Addict
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Originally Posted by 93LS1RX7
True. The piston is at the top of its stroke it could care less if it is exhaust or compression stroke.
DONT BLAME ME!!! hahaha
it was 1fastWS^ that said "I think it's common knowledge to do that before removing a cam. If you don't, then you have a chance of installing the cam 180* off since the dot on the crank gear will be on top twice (once for #1 TDC compression stroke, once for #1 TDC exhaust stroke)." I just said that was another reason why I did it so I wouldnt have to consider any other possible problems.
it was 1fastWS^ that said "I think it's common knowledge to do that before removing a cam. If you don't, then you have a chance of installing the cam 180* off since the dot on the crank gear will be on top twice (once for #1 TDC compression stroke, once for #1 TDC exhaust stroke)." I just said that was another reason why I did it so I wouldnt have to consider any other possible problems.
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Originally Posted by 93LS1RX7
The 180° out is the second reason why I suggested it after just seeing the dots lined up.
Originally Posted by 2xLS1
The cam determins if the crank is at the top of compression or top of exhaust. As long as the crank dot is up and the cam dot is down, it will be phased correct. Doesn't matter how many times you spin the crank.
