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Author
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Topic: rockers making noise?
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ShiftyGT
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Member # 3862
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posted
 
 
There is a constant chattering sound coming from inside my valve covers. Its not real load but when you listen for it is easy enough to hear.
This being a new engine; should i be hearing this? Is this an indication that my valve train is not set up tight enough?
Mike
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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Quick 88LX
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Member # 1950
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posted
When I installed my cam a few months back, the rockers were noisy at first and then quieted down after a few minutes. They still have a slight "ticking" sound to them, but that is expected with aftermarket cams/rockers. It isn't real loud either. I have adjusted my rockers TWICE since my cam install and they still make the same, soft ticking noise. The car runs hard and I have no issues with anything at all. I have to put my head under the hood to hear the noise anyway. When the car is at idle and the hood is shut, I can't hear a thing but a clean sounding 302 ![[Smile]](smile.gif)
Does this sound familiar? Or do you have other issues?
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"Men are Made, Not Born"
Car Picture : http://www.angelfire.com/theforce/quick88lx/
Original Member #495. Can I get my number back?
Posts: 1785 | From: Fairfield, CA/Okinawa, Japan | Registered: Oct 2002
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silverLX
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Member # 3207
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posted
What rockers do you have? Pedestal or Stud...or stock?
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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ShiftyGT
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Member # 3862
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posted
Ya, sounds familiar. I can only here it when i stick my head close to the motor.
Thanks, always good to double check.
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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silverLX
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Member # 3207
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posted
Pedestal or Stud mount, they could either be out of adjustment...tell me what you have so I can tell you the proper procedure to adjust.
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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ShiftyGT
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Member # 3862
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posted
Sorry silver, didnt see your post.
I have the FMS 1.6 pedastal mouint rocker arms. They are not adjustable
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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silverLX
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Member # 3207
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posted
Not exactly adjustable, but if it takes more than 1 full turn to get it torqued to 30 ft. lbs. after its snugged down, shave the rocker pivots down. It makes a difference, I have dealt with this on my friends car. PM me if you need help...
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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BudgetPower
New Member
Member # 5370
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posted
Get the shim kit and search for the directions. I think you can find them in the crane website.
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Morpheous PP, ported Explorer 3/8" spacer, Stage 1 ported GT40P,Cobra 1.7s, 65mm FRPP TB and spacer, FRPP headers, UDP. Next: FRPP MAF and 24 #s
Posts: 4 | From: Fremont | Registered: Feb 2005
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silverLX
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Member # 3207
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posted
You need shims if the rockers push down on the pushrods too much and you need more clearance...when they are noisy theres too much room between the rocker and pushrod, so the pedestal needs to be shaved down until it takes less than a full turn from snug to get 30ft. lbs.
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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ShiftyGT
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Member # 3862
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posted
Budget, you suggested shims, wouldnt that raise the rockers further, creating even more gap??
Silver, when i tightend the rocker bolts down, i dont think any of them went a full turn. 1/2 turn or less.
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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ShiftyGT
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Member # 3862
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posted
I belive they tightened down the max allowance.
What kind of issues will this cause besides the noise??
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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silverLX
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Member # 3207
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posted
quote:
Originally posted by ShiftyGT:
Budget, you suggested shims, wouldnt that raise the rockers further, creating even more gap??
Silver, when i tightend the rocker bolts down, i dont think any of them went a full turn. 1/2 turn or less.
TORQUE them to 30ft lbs.
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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BudgetPower
New Member
Member # 5370
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posted
I didn't see anything on how many turns it took you to get to torque. If I remember, the torque should be ~24 lbs. If it takes more than 1 turn to get there THEN you need shims. Or else, you need pushrods. ALSO, make sure that the valves are in the right position when you ar torquing the rockers. You should check this before buying anything.
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Morpheous PP, ported Explorer 3/8" spacer, Stage 1 ported GT40P,Cobra 1.7s, 65mm FRPP TB and spacer, FRPP headers, UDP. Next: FRPP MAF and 24 #s
Posts: 4 | From: Fremont | Registered: Feb 2005
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ShiftyGT
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Member # 3862
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posted
quote:
I belive they tightened down the max allowance.
What kind of issues will this cause besides the noise??
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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silverLX
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Member # 3207
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posted
Besides the noise, it will be fine I think...but I would fix it.
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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ShiftyGT
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Member # 3862
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posted
![[patriot]](graemlins/patriot.gif)
Thanks for the info
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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Hungry Hippo
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Member # 537
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posted
quote:
Originally posted by SilverLX351:
Not exactly adjustable, but if it takes more than 1 full turn to get it torqued to 30 ft. lbs. after its snugged down, shave the rocker pivots down. It makes a difference, I have dealt with this on my friends car. PM me if you need help...
if it takes more than 1 full turn, that means you need a shim. you would shave the rocker pedestals if it takes less than 1/4 turn. it would be better to buy longer pushrods in this case though
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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2stangs69-91
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Member # 1951
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posted
Silver sorry you have your adj procedure wrong for shimming the 1.6's (actualy backwards). If it takes more than 3/4 turn to get to 22-25 (not 30) you add shims between the pedastal and the rail. This takes up the room. You don't start counting how far you turn the pedistal bolt until you are at zero clearence at the pushrod to hyd lifter.
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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section525
Sponsored by Corona®
Member # 2819
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posted
I have these same rockers on my 5.0 too. And since day one they have seemed a little noisey. What I did on my install was:
Find zero lash
Tighten to 17#
And if it took more than 1 full turn to hit 17# you'd need to shim.
I didn't need to shim any of my GT40 heads. But do you think I should tighten to the 20-24# range a lot of people are suggesting?
Maybe I'll have ShiftyGT or Shiftylx listen and see what they think. It could be an exhaust leak for all I know. ![[Big Grin]](biggrin.gif)
Posts: 207 | From: Chico, CA | Registered: May 2003
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2stangs69-91
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Member # 1951
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posted
I believe the actual tourqe spec is 22 to 25.
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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