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Lifter Preload?

  • Thread starter Thread starter mikemustang289
  • Start date Start date May 17, 2006
M

mikemustang289

Member
Jan 12, 2006
224
0
16
mesa, az
May 17, 2006
#1
  • May 17, 2006
  • #1
I set my lifter preload a 1/4 turn on the polylocks. Now while driving and this is only at around 2000-2500 rpm, it sounds as it there is some valvetrain noise. Loud enough where I can hear it from inside the car. This could be an exhaust leak, I could be wrong, but will more preload, say 1/2 turn cure valvetrain noise?

The noise will occur under load while driving or if I just raise the rpm in nuetral.
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 17, 2006
#2
  • May 17, 2006
  • #2
comp cams instructions say that you need to set at 1/2 inch turn not 1/4. That being said i followed the instructions exactly and i still have some rocker noise i am going to do it again with another 1/4 turn.
 
G

grn92conv

New Member
May 15, 2006
28
0
0
May 17, 2006
#3
  • May 17, 2006
  • #3
mikemustang289 said:
I set my lifter preload a 1/4 turn on the polylocks. Now while driving and this is only at around 2000-2500 rpm, it sounds as it there is some valvetrain noise. Loud enough where I can hear it from inside the car. This could be an exhaust leak, I could be wrong, but will more preload, say 1/2 turn cure valvetrain noise?

The noise will occur under load while driving or if I just raise the rpm in nuetral.
Click to expand...
I like to use a half of turn past 0-lash.
 

aleborjas

New Member
Sep 11, 2005
610
0
0
May 17, 2006
#4
  • May 17, 2006
  • #4
i like to use 1/4 turn because i feel the engine little faster and i dont care about little valve train noise
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 17, 2006
#5
  • May 17, 2006
  • #5
grn92conv said:
I like to use a half of turn past 0-lash.
Click to expand...
looks like you read the instructions. The other timg is you have to adjust the lash at different points for the intake and exhaust valves. here is the link to instructions.
http://www.compcams.com/Technical/Instructions/Files/250.pdf
 

352Ford2

New Member
Oct 12, 2005
393
0
0
Seattle,WA
May 17, 2006
#6
  • May 17, 2006
  • #6
you guys know what a lash loop is?

try one out, you might pick up some power (although it is more of a solid cam thing)
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 17, 2006
#7
  • May 17, 2006
  • #7
could you explain lash loop?
 
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