Lifter Ticking Question
This is a discussion on Lifter Ticking Question within the General Help forums, part of the LSx Technical Help Section category; I just recently completed a cam, head, upgrade on an engine with around 109K on it. I have had no ...
10-31-2009, 06:44 PM #1
Lifter Ticking Question
I just recently completed a cam, head, upgrade on an engine with around 109K on it. I have had no issues with ticking until I put it back together. I did have the stock LS! heads milled .0025 and am using stock length 7.4 comp rods. I did not replace the oem lifters which was dumb....Do yall feel that the ticking is a lifter issue? I have check all rocker arm and they are tight. Thoughts?
11-02-2009, 11:44 AM #2
Are your rocker arms torqued to 26 ft lbs and did you use loctite? Lifters also may not be pumping up all the way
11-03-2009, 10:52 AM #3
is it a tick or sewing machine sound?
11-03-2009, 11:37 AM #4
11-03-2009, 02:08 PM #5
- Join Date
- Feb 2006
- Westchester, NY
- 1996 Camaro Z28 vert
Are you positive that it is not a slight exhaust leak?
11-03-2009, 02:33 PM #6
It's been my experience that changing cam & springs on the LS motors creates a noisy valve train.
Watch out if the noise changes though. I just replaced my cam [$420], lifters [$896], plus full gasket set, etc. on my '02 SS. Did it myself in the garage. What happened was I heard a slight squeal one morning on startup. Shut it off and dug into the motor until I found the cam was eroding and lifter rollers brinelling. I don't know if it was caused by high spring pressures or defective materials. Motor has about 80K on it now, cam was put in at about 35K.
I don't believe factory calls for thread-locker on the rocker bolts, none was found on disassembly. [Where did that info come from?]
How would not using thread-locker cause a ticking? I mean short of leaving a bolt loose, which would not be a thread-locker issue. [?]
11-05-2009, 12:14 AM #7
- Join Date
- Feb 2007
- 2000 Z28
This probably has nothing to do with this thread, but, I installed a GMS mass airflow sensor & housing awhile back, and was getting a horrible clatter at high rpms. I took it to the local GM dealer, and they said it was piston slap noise,(which they also said was common for the ls1 cars). I went back to the stock sensor, (at the advice of some members here) and have been fine since. Thanks to everyone who saved me a lot of trouble and cash in the long run... It is greatly appreciated.
11-05-2009, 04:14 AM #8
Thanks for responding everyone. Sorry have been out, couldn't respond. The ticking seems to have resolved itself for now. I'm really going with a lifter that did not preload correctly. I did all the install and torques correct. I did get to check torque on rocker, which where fine. No exhaust leaks, but I do understand the extra valvetrain noise, that I can hear. It probably would have been a good idea to replace lifters on build, and may still consider. Right now I'm more concerned with the stock 10 bolt after this build than anything. Thanks
11-05-2009, 06:12 AM #9
11-05-2009, 09:47 AM #10
Good to hear buddy. And yes Blue threadlocker is a given. I've had too many rocker bolts back out on me before because of the steel bolt heat expansion rate not being as much as the aluminum around it.
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