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Post by turbo16 on Oct 9, 2013 6:44:45 GMT -5
After running my new engine for 50 miles I heard a tapping and found it to be the #1 intake lobe on my new lunati cam  . I removed the follower and the cam felt better than the follower so I replaced the follower and readjusted the lifters (solid lifters by the way) there was some grey metal in the filter so i changed it with 5/30 and Lucas ZDDP additive. Does any one think the cam can be saved? |
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Post by rad15E on Oct 9, 2013 17:58:32 GMT -5
if its rough you might pollish it out,sense you have solid lifters you can get the ajustment back,what are you setting the lifters at
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Post by turbo16 on Oct 10, 2013 0:45:34 GMT -5
I set the lifters @ 0.006 hot. The lobe has a flat spot in it on the point its not big at all. less than 0.005" there is a little difference between the center and the outside of the lobe that doesn't contact the follower but not much. What do you think is the best way to polish it . I was going to try wet/dry sand paper starting with 600 grit and moving to 1500 but I will have to flat file the edges of the flat spot first to round it. I ran it with the valve cover off and way less oil sprays out of that lobe than the others at first I couldn't see any I don't think the hole was drilled out correctly by Lunati . All the other lobes look great they barely rubbed of the parkerized coating. My concern is after I clean it up how do I re coat it.
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Post by rad15E on Oct 10, 2013 19:42:11 GMT -5
i would use emery cloth to reshape the cam and follow with the wet -dry paper,even if you have to take a little material from the bottum and sides the most you will lose is a little in duration,one thing ,5w30 seames really light ,i use staight 50 in my race motors and 10w40 on the street-don't no about the coating
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Post by turbo16 on Oct 10, 2013 22:21:47 GMT -5
thanks I talked to a machinist today and he said the same thing. I need to run 5/30 synthetic If I use heavy oil the turbocharger bearing will overheat.
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Post by turbo16 on Oct 25, 2013 21:16:18 GMT -5
I polished out with emery then 320-400-600-1000-1500 and its been 200 miles with no problem. Thanks for the advise worked out great!
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Post by turbo16 on Oct 25, 2013 21:18:05 GMT -5
I also pushed a welding tip cleaner through and freed the oil hole
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. I removed the follower and the cam felt better than the follower so I replaced the follower and readjusted the lifters (solid lifters by the way) there was some grey metal in the filter so i changed it with 5/30 and Lucas ZDDP additive. Does any one think the cam can be saved?