Twin cam lifters...
#1
Twin cam lifters...
REPLACE THOSE LIFTERS!
In a previous thread I swapped out my stock cams with the AP 57h's and left the stock lifters in at 6200 miles that review is here:
https://www.hdforums.com/forum/touri...n-a-103-a.html
The lifters looked good, ( at 6200 miles ) and I felt confident in their performance. I had heard some rumbling about how bad the lifters are, but I also know some folks who have left them in with no (known) issues. I put 8300 miles on it and decided to swap out the AP 57h's with some S&S 551's I purchased. ( story for another thread ) No issues with the 57h's just came across the 551's and wanted to try them.
I was just going to swap out the cams, but then I purchased a new set of "C" lifters to swap out since they had close to 15 k on them.
This week I took it all apart to install my new S&S 551CE cams and I found out I had the lifter frosting that has been mentioned before here, (but I cannot locate the thread) found thread here: https://www.hdforums.com/forum/touri...l#post12321028
14500 miles. Not on all the lifters, the front intake appeared to be the worst, the rear exhaust appeared to have none.
So I am glad I decided to swap out the cams, not knowing what could have happened. I did not take any pictures, but I did some research and came across this: http://harleytechtalk.org/htt/index.php?topic=49579.0 It is a very interesting read....
I have ordered the VThunder lifters and will install those when I get them. If you have seen the lifter thread that was posted here about "frosted lifters" copy a link here.
Again, I had no noise, no point of failure, no issues. Just wanted to take it apart to try a different cam. So if you have done this, you may want to revisit the cam chest as a preventative measure.
This picture is similar to my lifters...
In a previous thread I swapped out my stock cams with the AP 57h's and left the stock lifters in at 6200 miles that review is here:
https://www.hdforums.com/forum/touri...n-a-103-a.html
The lifters looked good, ( at 6200 miles ) and I felt confident in their performance. I had heard some rumbling about how bad the lifters are, but I also know some folks who have left them in with no (known) issues. I put 8300 miles on it and decided to swap out the AP 57h's with some S&S 551's I purchased. ( story for another thread ) No issues with the 57h's just came across the 551's and wanted to try them.
I was just going to swap out the cams, but then I purchased a new set of "C" lifters to swap out since they had close to 15 k on them.
This week I took it all apart to install my new S&S 551CE cams and I found out I had the lifter frosting that has been mentioned before here, (but I cannot locate the thread) found thread here: https://www.hdforums.com/forum/touri...l#post12321028
14500 miles. Not on all the lifters, the front intake appeared to be the worst, the rear exhaust appeared to have none.
So I am glad I decided to swap out the cams, not knowing what could have happened. I did not take any pictures, but I did some research and came across this: http://harleytechtalk.org/htt/index.php?topic=49579.0 It is a very interesting read....
I have ordered the VThunder lifters and will install those when I get them. If you have seen the lifter thread that was posted here about "frosted lifters" copy a link here.
Again, I had no noise, no point of failure, no issues. Just wanted to take it apart to try a different cam. So if you have done this, you may want to revisit the cam chest as a preventative measure.
This picture is similar to my lifters...
Last edited by jammerx; 02-13-2014 at 10:56 PM.
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I swapped mine out when I was trying to trace down valve train noise. Put SE tappered adjustables in. Didn't notice a whole lot of differance but felt better about getting those mexican made garbage out of there. What really made the diff on quietting my motor down was going to a richer map after installing VHDDs which bewilders me. I've since gone back to dino oil but it quietted down before that? Lets not turn this into an oil thread please!!
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