SOLID ROLLER VALVE LASH

Old 04-05-2012, 07:15 PM
  #1  
stroker_383
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Sep 2003
Posts: 3
Default SOLID ROLLER VALVE LASH

I built a 388 stroker motor, I have a comp cams solid roller .630 lift. Comp solid roller lifters, +.100 hardened Jegs pushrods and some "no name" stainless steel roller rockers.

Heres my problem, I set my valve lash 022ex 020 int. After I set this I can bump the engine over and my valve lash will be 040 +. Is it possible that the pushrod seat is being pushed in on these new rockers? None of the pushrods are bent. I have ran the motor for roughly 5 minutes after rebuild. I shut it down due to some noise that just came on. I am hoping that these loose rockers are my mystery noise. Any one have problems with crappy no name rockers like this? Thank you JD
stroker_383 is offline  
Old 04-06-2012, 04:53 AM
  #2  
curtisreed
Senior Member
RACING JUNKIE
 
curtisreed's Avatar
 
Join Date: Feb 2004
Location: KIEFER, OK.
Posts: 1,311
Default

Are you using the exhaust open / intake close method to set your lash?
curtisreed is offline  
Old 04-06-2012, 06:10 AM
  #3  
coolracing
Senior Member
MASTER BUILDER
 
Join Date: Jan 2008
Location: Yooper
Posts: 168
Default

What cylinder head?
coolracing is offline  
Old 04-06-2012, 09:43 AM
  #4  
TS1955
Senior Member
DYNO OPERATOR
 
Join Date: Aug 2007
Location: Lost Creek, WV
Posts: 533
Default

To set your lash...When your exhaust valve "STARTS" to "OPEN", you will set your intake lash. Now, when your intake valve "STARTS" to "CLOSE" you set your exhaust lash. When I set mine, I'll do all of the intake valves first in the firing order sequence, then I'll do all of the exhaust valves.

TS1955
TS1955 is offline  
Old 04-06-2012, 04:17 PM
  #5  
stroker_383
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Sep 2003
Posts: 3
Default SOLID ROLLER VALVE LASH

I was using the ex open int close method.. I'm sure using a dial indicator would be best.



The heads are 049 Bowtie aluminum heads.. 55cc chambers.
stroker_383 is offline  
Old 04-06-2012, 04:56 PM
  #6  
markdunlap
Senior Member
DYNO OPERATOR
 
Join Date: Jan 2004
Location: central Illinois
Posts: 459
Default solid

You might want to check the lifters/cam lobes. The excess clearance can come from either end of those pushrods.

Otherwise either relash those rockers or put on a different set of rockers to see if the noise goes away.
markdunlap is offline  
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service