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  Mustangsandmore Forum Archive
  '64 1/2 to '68 1/2 -- The Classic Mustang
  Comp Cams lifters: anybody getting noise out of these?

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Author Topic:   Comp Cams lifters: anybody getting noise out of these?
BorgMoose7of9
Journeyman

Posts: 36
From: Aloha, Oregon, 97006
Registered: Apr 2003

posted 04-15-2003 08:43 PM     Click Here to See the Profile for BorgMoose7of9        Reply w/Quote
Hello...
I am currently running a set of Comp hi-energy lifters in my 351w along with an Xtreme energy 4x4 cam....I am getting valvetrain noise to the extent of driving me nuts....everything else is in great shape(no questions about any of the supporting cast, others I have spoken to have said the same thing about the lifters....). These lifters bleed off after 5-6 hours of sitting making it sound like the rockers are falling off the engine when firing it up cold. No other lifter I have used makes this much noise...I have this engine in a E-150, with only a fiberglass doghouse to stop the noise...this does not sound healthy....any replies would be welcome.

V8 Thumper
Gearhead

Posts: 4777
From: Phoenix, Arizona
Registered: Dec 2001

posted 04-15-2003 10:47 PM     Click Here to See the Profile for V8 Thumper        Reply w/Quote
Oh yea... my Comp lifters make ALL KINDS of noise... like about .022 (hot) worth

Seriously, I'd say your rocker arm geometry is off with the new 'stick. If I had to guess, you're probably looking at .060-.080 longer pushrods required.

Welcome to M&M

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
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SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 04-16-2003 05:06 PM     Click Here to See the Profile for SundanceKid        Reply w/Quote
I had comps lifters in one of my cars, they made alot of noise. They never failed on me nor did the noise hurt a thing. But man did they make some noise! Sounded like a diesel! Well...not that bad, but it dove me nuts too.

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 04-17-2003 08:49 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Welcome to M&M Moose !
It's the nature of the beast my friend.
The Comp lifters have a larger bleed off hole to help aid in warding of premature pump up and valve float. Consequently, they are rather prone to "morning sickness".
About the only way you can cure the cold start up noise is to replace the lifters with some stock style ones.
One question though. How much depression did you put into the plunger? Are your rockers the bolt down type?

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

BorgMoose7of9
Journeyman

Posts: 36
From: Aloha, Oregon, 97006
Registered: Apr 2003

posted 04-18-2003 05:04 AM     Click Here to See the Profile for BorgMoose7of9        Reply w/Quote
Current head setup:
1970 351w heads;
Ported & polished(never again, lol)
Comp 986-16 springs
Machined for, and installed teflon seals
machined for, and installed, 3/8" screw-in studs and guideplates
Hardened pushrods
Harland Sharp Aluminum roller rockers
poly locks
Geometry? I have an old length checker/dummy rocker arm, all checked out fine there.....

Plunger? have tried no-turn, 1/8th, 1/4th, 1/2, 3/4th, 1 full turn, 2 full turns, all the same. I am getting noise out of two areas, first being about midway down on the heads(valves are slapping the seats, from what I can tell), and in the lifter valley.
Comp says that due to extreme ramp angles, these cams will make some SLIGHT noise( yes, slightly like all of the goshdarn rocker arms are falling off!). I do not see how this can be healthy for valves or valve seats, and at this point, am about ready to do a cam swap(with a different cam company, and heck a solid would not even bother me right now.....at least I know the lifter is not collapsing)

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 04-18-2003 12:03 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Are you setting the lash running?
I would do one side at a time hot and running (I know it get's messy) and back off until clicking, then s l o w l y turn in 1/4 turn beyond clicking stop.
I have a lot of success with that method.
Then get about two cans of brake clean and spray off the mess.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

BorgMoose7of9
Journeyman

Posts: 36
From: Aloha, Oregon, 97006
Registered: Apr 2003

posted 04-18-2003 07:19 PM     Click Here to See the Profile for BorgMoose7of9        Reply w/Quote
I REALLY do not like to run the rockers on this engine, as I am running BBK 5.0 351w swap headers(late mustang) on this conversion van, and I had to use header wrap to keep the heat away from the Doghouse seals. The long and short of it is, I have ran thru the rockers several times, and the first time I did it, oil soaked into the headerwrap, and promptly......CAUGHT ON FIRE. It was really fun running back to the side of the house, unraveling the waterhose, running back to the van, slipping and falling about 5 times on the wet grass along the way, squeezing the handle, and then realizing the water was not on. So I ran back to the faucet, slipped twice more, lost my shoe on the first slide, turned it on, and ran back to the van(no slips), only to then discover that I had accidentally locked the water nozzle on full blast, and it was now spraying down the front seats and dash in the van(spraying everywhere except the fire) . I quickly got the fire out, and left it running to dry it all out, and it took about 2 days to dry out the front(middle of november) interior area.
Anyway, I have tried all of that. Through posting here, and other sources, and even griping with the Comp tech line(I hope you have at least 2 hours to waste trying to talk to someone there), and have discoveres this: The cam istelf is the cause of the noise problem. In order to create 2 more horsepower, the created REALLY steep valve angles, and the valves, when closing, slam the seat, HARD. I am going to change the cam in this engine, as I am running new stock valves in these heads, and really don't feel like having to chase valve chunks.....

[This message has been edited by BorgMoose7of9 (edited 04-18-2003).]

Moneymaker
Administrator

Posts: 29200
From: Lyons, IL, USA
Registered: May 99

posted 04-18-2003 10:30 PM     Click Here to See the Profile for Moneymaker        Reply w/Quote
Don't get mad, but that was a really funny and well told story. I could literally visualize you running with the hose and all.
lol
Too bad you didn't have it on tape.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

BorgMoose7of9
Journeyman

Posts: 36
From: Aloha, Oregon, 97006
Registered: Apr 2003

posted 04-18-2003 11:48 PM     Click Here to See the Profile for BorgMoose7of9        Reply w/Quote
No....I am really shorted out, now....no, I could do nothing, sitting out there, hosing the header off(Hey, it was still running!), freezing my derierre' into a solid ice chunk,(slip # 3 was into a half-foot puddle of water by a tree) but laugh, and complain about the lack of a camera.......some overly large guy, running back and forth between the van and the water faucet, with the engine ablaze should have been worth a buck or two.....

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