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Author
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Topic: anyone having noise issues with either lifters or roller rockers?
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borgwarriormoose
Journeyman Posts: 5
From: Aloha, or 97007
Registered: Oct 2002
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posted 10-30-2002 06:17 PM
   
Hello, first Post!!!
I have built a mexican block '77 351 and installed it in my E-150. Among other modifications, I have a Comp Cams Xtreme energy 4x4 cam in it, matching high energy hydraulic lifters,matching double valve springs, and Harland Sharp 1.6 roller rockers on 1970 351 heads, which have been modified by extensive(by me) porting, screw in studs, teflon seals, hardened seats and guide plates.
The problem I am having, is that at any preload that I choose(even with 0 preload!), it sounds like I am running a soild lifter setup with all sorts of insane valvetrain clatter, or that the lifters are constantly in a state of collapse. There is no binding. nothing is contacting anything else(That I can see),,,,,Any thoughts? I have had a few other setups with the same lifters, and had zero noise, This engine also has good oil pressure......Bad lifters? rocker arms?
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Hell_Fish
Gearhead Posts: 860
From: Austin, TX.
Registered: May 2002
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posted 10-30-2002 07:41 PM
What springs are you running?
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borgwarriormoose
Journeyman Posts: 5
From: Aloha, or 97007
Registered: Oct 2002
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posted 10-30-2002 09:53 PM
comp 986-16's(double springs and dampener) and those were changed(with heads still on the engine, and this engine is in a '85 ford e-150 van, with the doghouse surround) after another noise popped up, I had too weak a spring on it noise is still there. It sounds like it may have something to do with the rockers, but they operate smoothly off of the head. Comp cams tried to tell me that it was the valves smacking the valve seats, but this is not the first hi-po engine I have built, nor is it the fastest, And I have never heard of valve noises THAT loud.
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lyle29464
Gearhead Posts: 944
From: Mt. Pleasant S.C.
Registered: Mar 2000
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posted 10-30-2002 11:15 PM
How much oil pressure do you have?
I had an oil pump that stuck closed and put out too much flow It sounded like yours.
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67coupe
Gearhead Posts: 484
From: dallas NC usa
Registered: Nov 2000
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posted 10-30-2002 11:48 PM
ive got the same problem on my cleavland but ive changed everything even the heads i just dont get it i dont think mine is as noisy but i got used to it hope u figure it out mayby i missed something?------------------
Josh
67 coupe with 351c
8.41 in the 1/8
1.90 60'
at 82.03 mph
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5
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Moneymaker
Administrator Posts: 25052
From: Lyons, IL, USA
Registered: May 99
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posted 10-31-2002 12:10 AM
Welcome to M&M borgwarriormoose  !(I love the handle) I would definatly check two very elementary items.
1) Check your oil supply to the top end
2) Verify your push rod length. They may be too short.  ------------------
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
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!"
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bluestreek
Gearhead Posts: 1720
From: Athens,GA
Registered: Jul 2001
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posted 10-31-2002 01:14 AM
I hope I'm wrong, but that is also a common noise that comes from of a cam that didn't break in correctly.Maybe it's something simple like misaligned guide plates.
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borgwarriormoose
Journeyman Posts: 5
From: Aloha, or 97007
Registered: Oct 2002
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posted 10-31-2002 01:11 PM
Well, so far as oil flow goes, I had to switch to the ford motorsport tall chrome-stamped-steel valve covers with the baffles, it was blowing oil out of the grommets on the aluminum(or how the british say it, AL-LEW-MINIUM) Motorsport covers without the baffles, so there is good oil flow I think(I also made the mistake of trying to run the rockers with the engine running, remember, this is in an '85 econoline conversion van, and the engine is exposed to the interior).I have a rocker arm Geometry checker, and it was really close, as a matter of fact, the best yet I have worked on..... Has anyone here ran Comp's fast bleed lifters? And if there is someone, do you have alot of noise with those? I think that I may have a set of incorrectly boxed fast bleeds, the noise gets worse as the RPM increases up into the 6000 rpm range.
Thanks, I hope I am not trying to leech too much information with out giving something back, I know a few things so I can give knowledge back, but as this problem demonstrates, you can never know enough....
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indyphil
Gearhead Posts: 2255
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 10-31-2002 03:11 PM
I think if you had fast bleed lifters the noise would go away at the higher RPMS. I would check the pushrod length.
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RonnieT
Gearhead Posts: 821
From: Port Allen, La. 70767
Registered: Jun 99
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posted 10-31-2002 07:10 PM
When you say they make noise with 0 preload do you mean that you bottomed the plunger out in the lifter, or just started to push on the plunger? The preload setting should colapse the lifter .030" if I remember correctly. One thing I would look at is how much clearance there is between the guide plate and pushrod. When I first put my engine together the guide plates were for 3/8 pushrods and I had 5/16" pushrods. I'm sure if I would not have caught this it would have made a lot of valve train noise.------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23
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