Thanks Frank,
I have the Mopar roller rocker set. I believe the standoffs have 5/16"-18
on the block portion, and 3/8"?? on the rocker portion. (The upper portion
of the standoff is fine threaded.) I turned the lash down to a positive
friction feel of the rod rotating in the lifter cup without any compression
of the lifter, then added in 1/3 turn of the lockdown nut. When I tightened
down the set screw, I wrenched both the set screw and nut together to assure
a positive lock. Total pre-load probably equated to just over 1/2 turn, but
no more that 2/3 max.
This kept bothering me yesterday. I just couldn't imagine the adjustment
was that critical on a hydraulic lifter. I went back and re-checked my
distributor last night and discovered I misinterpreted setting the #1
cylinder. I used the square standoff on the distributor housing, when I
should have been using the detent on the pickup disc. Once corrected, it
fired right up. Broke in the cam, and it sounds real nice now. Thanks
again.
Rich
-----Original Message-----
From: Frank T Holloway [mailto:Frank.T.Holloway@KP.ORG]
Sent: Wednesday, April 12, 2000 7:57 PM
To: dakota-truck
Subject: Re: DML: RE: Re: Now tight is too tight?
Rich,
Most hydraulic lifters like to be compressed approx. .040 inch (Dodges
included). If you are running a 5/16 - 18 stud, then each revolution of the
nut is good at compressing the lifter .055 inch. With the valve covers off.
Identify the valves that are closed. Rotate the pushrods by hand and tighten
the rocker nut. Once resistance is felt at the pushrod, then tighten the nut
down about 3/4 turn and tighten the jam nut. Click the starter and continue
the process until all lifters are set. The only time you would want less
installed (compressed height) is when the engine is going to see RPM's much
higher than these engines can stand.....
Frank
Rich.Wisotzkey@gd-wts.com on 04/12/2000 09:48:00 AM
To: dakota-truck@buffnet.net@Internet
cc: (bcc: Frank T Holloway/CA/KAIPERM)
Subject: DML: RE: Re: Now tight is too tight?
Thanks Bernd,
Guess I'll be pulling those valve covers off tonight, "Oh Boy!"
Rich
-----Original Message-----
From: Bernd D. Ratsch [mailto:bernd@texas.net]
Sent: Wednesday, April 12, 2000 9:41 AM
To: dakota-truck@buffnet.net
Subject: DML: Re: Now tight is too tight?
Set them to 0 - 1/4 turn at most.
- Bernd
----- Original Message -----
From: "Wisotzkey, Rich" <Rich.Wisotzkey@gd-wts.com>
To: <dakota-truck@buffnet.net>
Sent: Wednesday, April 12, 2000 7:56 AM
Subject: DML: Now tight is too tight?
> Went to fire up the 'ol Dak last night after installing the roller rockers
> (amont other things). When the starter spun, there didn't seem to be as
> much compression resistance as I remember. It wanted to run, but only
> sputtered around 1000rpm even with the TB opened up. Didn't leave it run
to
> long like this because I need to break in the new cam also. It sounded
like
> I wasn't getting a good closed compression stroke.
> As I recall, the manual says not to soak the lifters prior to installing,
so
> I didn't, even though they have been sitting for three months. I
initially
> set the rockers around 1/3 loading, and when I finished tightening
(locking)
> them down, believe they are more like 1/2 - 2/3 turn loaded. Is this to
> much? Could this be my problem? Any help appreciated.
> Rich - Ashburn, VA
> (the novice rocker installer)
>
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