Dull knocking on 95 fxstc
Road Warrior
Joined: Nov 2007
Posts: 1,641
Likes: 4
From: south of Boston
i have been chasing a rapping in my 91 evo since i rebuilt the engine last year with headwork, ev27, SE pistons and rings, and a few other things
i swapped out cam, ground down webbing in rocker covers, re-adjusted pushrods a dozen times, honed out and cut back push-rod tubes, checked piston to valve clearance, and a few other things
....nothing has stopped it
BUT, what has eventually happened is that it has gotten less frequent... and now, i just ignore it....power and oil is all there, so i live with it
i swapped out cam, ground down webbing in rocker covers, re-adjusted pushrods a dozen times, honed out and cut back push-rod tubes, checked piston to valve clearance, and a few other things
....nothing has stopped it
BUT, what has eventually happened is that it has gotten less frequent... and now, i just ignore it....power and oil is all there, so i live with it
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Cruiser
Joined: Mar 2010
Posts: 237
Likes: 12
I installed Torrington cam bearing, outer cam oil seal, and adjustable crane pr's when I swapped the cam. 40k on the bike, and the lifters are good.
As was said earlier, she has power and oil. I'll just ride.
As was said earlier, she has power and oil. I'll just ride.
Club Member
Joined: Apr 2011
Posts: 5,776
Likes: 7,811
From: SE Louisiana
Does it make the noise at idle too, or just under load?
If just under load, take about 4 or 5 degrees of timing out just to see if it makes a difference.
You may have lean AFR at midrange after the cam change and hearing pinging.
If just under load, take about 4 or 5 degrees of timing out just to see if it makes a difference.
You may have lean AFR at midrange after the cam change and hearing pinging.
Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Did you check the cam gear size compared to the pinion gear before installing the cam?
You may be hearing the sound of excessive gear lash.
How many miles are on the lifters?
Did you replace the inner cam bearing?
How many miles are on the outer cam bushing?
Don`t accept the old wives tale about the EV27 being noisy, that is just an excuse to not solve the problem, there is more involved in a cam change than simply swapping out cams.
I have an EV 27 in my Evo, it is very quiet.
You may be hearing the sound of excessive gear lash.
How many miles are on the lifters?
Did you replace the inner cam bearing?
How many miles are on the outer cam bushing?
Don`t accept the old wives tale about the EV27 being noisy, that is just an excuse to not solve the problem, there is more involved in a cam change than simply swapping out cams.
I have an EV 27 in my Evo, it is very quiet.
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Cruiser
Joined: Mar 2010
Posts: 237
Likes: 12
So no special one time tools to get the wrist pins in and out? Once I get the clips out, do the pins slide out? Should they be replaced? Thanks.
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
You only need to take one wrist pin out and push the piston pin out from the opposite end, Make sure you use a marker to mark the pins for front and rear and direction they came out so they can go back in same way. You may find you need a cut down allen key for the very rear rocker covers as there's minimal clearnce. I think its 3/16 allen but you can confirm that with the front allen bolts.
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