Why is this cam installed this way?
12-15-2013, 10:53 PM
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Why is this cam installed this way? I bought this built long block by HKE from another user a LONG time ago and just got back to my project. I am putting a different cam in this motor and when I took the front cover off I found that the dots were not aligned. The cam specs are 232/238 114 +4. The motor spins freely. Why is this?
12-16-2013, 08:52 AM
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First I would check the valve events and write everything down for the .006 and .050 values. That right there along with 5 more minutes of math would tell you if the cam is in correctly or not. Then I would call HKE and ask to make sure, and email the pictures to Erik.
Given the location of the dots, that cam has to be retarded like 30 crank degrees or more. Unless there is something else going on which nobody understands, hence calling HKE.
Given the location of the dots, that cam has to be retarded like 30 crank degrees or more. Unless there is something else going on which nobody understands, hence calling HKE.
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12-17-2013, 09:42 PM
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Rotating the cam dot to the 6 o'clock position shows that the crank sprocket is advanced 1 tooth to the right. I see that if the front dot were on the crank key/groove, the dots would line up perfectly. I will degree the cam just to verify the valve events on the cam card but I do not see a point in pulling the crank sprocket and pressing it back on if it is the same thing as moving the timing chain one link over. I've ordered a degree wheel but I'm having trouble finding the tool to put in the spark plug hole to calculate TDC. Any help?
12-18-2013, 08:34 AM
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http://www.summitracing.com/search/p...e/piston-stops
When piston #1 is at TDC the keyway groove in the crank does not line up with the dot on the crank sprocket. You need to find TDC and degree the cam before you do anything else with it.
When piston #1 is at TDC the keyway groove in the crank does not line up with the dot on the crank sprocket. You need to find TDC and degree the cam before you do anything else with it.
12-18-2013, 08:48 AM
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There are two dots on the crank sprocket, one on the gear and one on the oil pump drive. The key way should line up with the dot on the front of the drive if there is not going to be any additional advance or retard installed. The other key way slots are for installing the cam with advance or retard. The dot towards the back on the gear should line up with the dot on the cam gear no matter what.
I'd bet you the dot on the front of the drive was used to line up on the dot on the cam gear, and not the dot on the gear.
I'd bet you the dot on the front of the drive was used to line up on the dot on the cam gear, and not the dot on the gear.
12-19-2013, 01:39 AM
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I don't believe the previous owner removed/replaced the cam. I called HKE but no answer. I emailed them with a link to this thread and they recommended I degree to verify.
12-21-2013, 09:53 PM
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Alright folks. Degreed the new cam today installed the same way the old one came off and it was WAY off. Pulled the crank sprocket and pressed it on with the key in the snout dot. Put re-established TDC, tightened degree wheel and rotated to 0.050" intake valve lift and I was bang on the cam card. Got the intake closing degree perfect as well. Spot on grind from EPS with Patrick G's specs. Thanks for all the help folks. My engine stand was occupied by another project so I degreed this one on a storage stand kneeling and sitting the whole time. I'm worn out and my back hurts. Took longer than it should have, but peace of mind is priceless.