Posted By: dfsmopars
New build- ticking lifters - 03/22/12 02:59 AM
With the exhaust now on the 360 Magnum I can hear what sounds like a couple of lifters ticking on the left bank.
I thought at first it could be an exhaust leak but no leaks can be found. Remember this is a roller cam engine. Are there some things to try first to quiet them down?
There is now about 30 miles of street driving on the engine.
Posted By: torkrules
Re: New build- ticking lifters - 03/22/12 04:53 PM
Solid or Hydraulic roller? Aluminum head?
Posted By: bobs66440
Re: New build- ticking lifters - 03/22/12 05:09 PM
What did you set the lifter preload at?
Posted By: dfsmopars
Re: New build- ticking lifters - 03/23/12 02:59 AM
Kasey,
The lifters are new from Hughes. I measured the original push rods and they were right on the correct factory length. The rockers were clean but of course they are used.
Posted By: CYACOP
Re: New build- ticking lifters - 03/23/12 03:10 AM
Happened to me too and the tick didnt go away. I replaced the right bank with another set of new lifters and havent heard one since. Are they on one side, all of them, one lifter or what?
Posted By: Diplomat360
Re: New build- ticking lifters - 03/23/12 03:13 AM
This may sound silly, but as you were assembling these, did you go through at least 2-3 cycles of crank rotation? I wonder if the pushords happen to be hitting the head in the head passege somehow?
I did have this happen...I knew the fit was tight, but thought it was good enough. Not quite...after the initial start-up, I pulled the covers to find a good/deep scuff mark on one of the pushrods...it was enough to give it a good clatter though.
Posted By: dfsmopars
Re: New build- ticking lifters - 03/23/12 11:08 AM
This is a '94 5.9 Magnum engine that came from the factory with a roller cam. There is no mixing and matching going on here.
I do remember a couple of lifters that seemed to ride in their bores a little tighter than the others. I took Emory cloth and smoothed the corners at the top and bottom of the bores. Maybe it was not enough.
Posted By: Hughes
Re: New build- ticking lifters - 03/23/12 10:16 PM
We always suggest running at least 2 full turns of pre-load (about .080" ) on the Magnum hydraulic roller lifters. These lifters have about .180" of travel in them so there is plenty of room. If you don't have adjustable rockers I would try a little longer pushrod. We have found that less than .080" pre-load just about always has a slight tick. Good Luck!
Kevin @ Hughes Engines
