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Hydraulic lifters adjustment ??? #4603061
12/14/17 12:44 AM
12/14/17 12:44 AM
Joined: Apr 2015
Posts: 467
Reunion Island
Superflan Offline OP
Superflan  Offline OP

Joined: Apr 2015
Posts: 467
Reunion Island
Hi,

Itís my understanding that valvetrain with hydraulic lifters shouldnít need any adjustment regarding valve lash.

But I regularly stumble upon some workshop manuals for those engines that describe some valve lash adjustment procedure.

Whatís the deal? I think Iím lost.


Peugeot Partner 1.9 D, 5W40 C3, 245000 Km, running on WVO
Wife's Mitsubishi Outlander PHEV, dealerís overfilled, 16000 Km
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603065
12/14/17 12:50 AM
12/14/17 12:50 AM
Joined: Aug 2011
Posts: 2,187
Lakeside, CA
Blkstanger Online content
Blkstanger  Online Content

Joined: Aug 2011
Posts: 2,187
Lakeside, CA
It's there for engine assembly.


99 Jeep WJ 4.7 197,000 Maxlife 10w30, Fram Ultra.
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603069
12/14/17 12:59 AM
12/14/17 12:59 AM
Joined: Jul 2003
Posts: 5,086
New Zealand
Silk Offline
Silk  Offline

Joined: Jul 2003
Posts: 5,086
New Zealand
Up to the '70's there was an adjustment to put the lifter in the centre of it's travel. Later engines it was fixed...any work on valves and seats could take them out of the window.


1987 BMW R65 - Aegis SAE30
2005 Nissan Expert - 5W-40 Castrol Magnatec diesel.
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603073
12/14/17 01:05 AM
12/14/17 01:05 AM
Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
Alex_V Offline
Alex_V  Offline

Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
It depends on the engine. They don't require it nearly as often as solid lifter designs, but some still need it periodically. Older Chevy engines, for example.


To quote a friend, "Synthetics, man."

'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603279
12/14/17 10:05 AM
12/14/17 10:05 AM
Joined: Sep 2009
Posts: 325
Rockies
Scdevon Offline
Scdevon  Offline

Joined: Sep 2009
Posts: 325
Rockies
Hydraulic lifters need to be preloaded a little bit when initially set up. With hydraulic lash adjusters in an overhead cam set up, the preload is accomplished by the cam / roller follower / valve stem geometry and some lash adjusters are adjustable through the small oil hole.

In a typical American V8 "Small Block Chevy" type engine, on initial assembly you would crank down on the rocker arm nut while spinning the pushrod with your fingers until you can't spin the pushrod anymore and tighten the rocker arm nut another 3/4 turn and you're done.

Other American engines like Fords use a positive stop shoulder on the rocker arm pedestal that usually equals the proper preload when fully tightened. Various lengths of pushrods were available in case you ended up with too much or too little preload due to cylinder head resurfacing, etc but it usually isn't an issue with positive stop rockers.


2003 Mustang Mach 1. 32V 4.6 Liter. Motorcraft Syn Blend 5W30
1970 Mustang Convertible 302-2V Auto (Stock) M/C 10W30
1970 VW Beetle 1600 DP
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603428
12/14/17 12:23 PM
12/14/17 12:23 PM
Joined: May 2009
Posts: 12,491
N.H, U.S.A.
ARCOgraphite Online content
ARCOgraphite  Online Content

Joined: May 2009
Posts: 12,491
N.H, U.S.A.
I only preloaded 1/4- 1/3 turn on my fairy cammed street SBC, Is this wrong?


2019 VW Jetta S,6M OCI#0 2103mi-Castrol Edge Prof? VW508+OE Filter; '17 Subaru Crosstrek CVT OC#6 43467mi-Valvoline Adv 0w20 + SOA Filter
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4603462
12/14/17 12:51 PM
12/14/17 12:51 PM
Joined: Jul 2014
Posts: 583
Wisconsin
Srt20 Offline
Srt20  Offline

Joined: Jul 2014
Posts: 583
Wisconsin
On my race engines I adjusted them so I could just turn the pushrod with 2 fingers. Or just so the ticking stops if doing it while running. Definately more power that way, but probably have to adjust them more often.
I might go slightly tighter on a street engine, unless it was a sunday driver only type. Low miles per year.

Re: Hydraulic lifters adjustment ??? [Re: ARCOgraphite] #4603470
12/14/17 12:59 PM
12/14/17 12:59 PM
Joined: Sep 2009
Posts: 325
Rockies
Scdevon Offline
Scdevon  Offline

Joined: Sep 2009
Posts: 325
Rockies
Originally Posted By: ARCOgraphite
I only preloaded 1/4- 1/3 turn on my fairy cammed street SBC, Is this wrong?



As long as the lifter has enough preload that there is zero valve clearance "slack" at any time, they should be fine. 1/4 turn is a little on the light side and it won't allow the lifter to take up much wear in the rocker arms and pushrods like 1/2+ turn would.

You can adjust them while running if you tighten the rocker arm nut until the lifter stops clacking and go another 1/2 turn (or whatever) from there, but the factory never did it this way and it's messy and time consuming and unnecessary.


2003 Mustang Mach 1. 32V 4.6 Liter. Motorcraft Syn Blend 5W30
1970 Mustang Convertible 302-2V Auto (Stock) M/C 10W30
1970 VW Beetle 1600 DP
Re: Hydraulic lifters adjustment ??? [Re: ARCOgraphite] #4603823
12/14/17 08:39 PM
12/14/17 08:39 PM
Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
Alex_V Offline
Alex_V  Offline

Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
Originally Posted By: ARCOgraphite
I only preloaded 1/4- 1/3 turn on my fairy cammed street SBC, Is this wrong?



After putting a new, smoother cam in my Suburban's 350 (some dummy put a 3/4 cam in an otherwise stock smog-era engine) I found differing numbers, from 1/4 to 3/4 or maybe even a whole turn. IIRC I set mine to 1/4 and 4 or 5,000 miles later the valve train is perfectly quiet.


To quote a friend, "Synthetics, man."

'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4604056
12/15/17 02:40 AM
12/15/17 02:40 AM
Joined: Apr 2015
Posts: 467
Reunion Island
Superflan Offline OP
Superflan  Offline OP

Joined: Apr 2015
Posts: 467
Reunion Island
I think Iím lost. Any thoughts about Euro 4cyl engines?

Last edited by Superflan; 12/15/17 02:41 AM.

Peugeot Partner 1.9 D, 5W40 C3, 245000 Km, running on WVO
Wife's Mitsubishi Outlander PHEV, dealerís overfilled, 16000 Km
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4604065
12/15/17 03:32 AM
12/15/17 03:32 AM
Joined: Jul 2003
Posts: 5,086
New Zealand
Silk Offline
Silk  Offline

Joined: Jul 2003
Posts: 5,086
New Zealand
I've never seen any adjustment on hydraulic lifters or lash adjusters on an ohc engine.


1987 BMW R65 - Aegis SAE30
2005 Nissan Expert - 5W-40 Castrol Magnatec diesel.
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Hydraulic lifters adjustment ??? [Re: Silk] #4604184
12/15/17 09:11 AM
12/15/17 09:11 AM
Joined: Sep 2009
Posts: 325
Rockies
Scdevon Offline
Scdevon  Offline

Joined: Sep 2009
Posts: 325
Rockies
Originally Posted By: Silk
I've never seen any adjustment on hydraulic lifters or lash adjusters on an ohc engine.


This type of OHC lash adjuster (Ford) is adjustable with an allen wrench and they can be adjusted in place through the hole in the cam follower with everything assembled. This is something that hardly ever needs adjusting, though. If you have preload issues on an OHC engine that is anywhere close to stock, you have other more serious issues. The "sweet spot" on OHC lash adjusters is pretty forgiving with a big window of error engineered into them.



(Images borrowed from the internet)


2003 Mustang Mach 1. 32V 4.6 Liter. Motorcraft Syn Blend 5W30
1970 Mustang Convertible 302-2V Auto (Stock) M/C 10W30
1970 VW Beetle 1600 DP
Re: Hydraulic lifters adjustment ??? [Re: Superflan] #4604271
12/15/17 10:24 AM
12/15/17 10:24 AM
Joined: May 2009
Posts: 12,491
N.H, U.S.A.
ARCOgraphite Online content
ARCOgraphite  Online Content

Joined: May 2009
Posts: 12,491
N.H, U.S.A.
Ive seen Class-3 lever finger followers with stationary lash adjusters on mainly SOHC but I see Subaru uses this on FB engine now - last time I saw a cutaway.

Last edited by ARCOgraphite; 12/15/17 10:28 AM.

2019 VW Jetta S,6M OCI#0 2103mi-Castrol Edge Prof? VW508+OE Filter; '17 Subaru Crosstrek CVT OC#6 43467mi-Valvoline Adv 0w20 + SOA Filter
Re: Hydraulic lifters adjustment ??? [Re: Scdevon] #4604690
12/15/17 05:25 PM
12/15/17 05:25 PM
Joined: Jul 2003
Posts: 5,086
New Zealand
Silk Offline
Silk  Offline

Joined: Jul 2003
Posts: 5,086
New Zealand
Originally Posted By: Scdevon

This type of OHC lash adjuster (Ford) is adjustable with an allen wrench and they can be adjusted in place through the hole in the cam follower with everything assembled.


I knew someone would come up with something. I've never seen one of thoses, or if I have I have never had to adjust them. I don't like the term ''preload'' when setting hydraulic lifters, there is no preload, you are just putting it close to the centre of it's movement, to preload it you would be going beyond it's range.


1987 BMW R65 - Aegis SAE30
2005 Nissan Expert - 5W-40 Castrol Magnatec diesel.
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Hydraulic lifters adjustment ??? [Re: Silk] #4605750
12/16/17 07:59 PM
12/16/17 07:59 PM
Joined: Sep 2009
Posts: 325
Rockies
Scdevon Offline
Scdevon  Offline

Joined: Sep 2009
Posts: 325
Rockies
Originally Posted By: Silk


I don't like the term ''preload'' when setting hydraulic lifters, there is no preload, you are just putting it close to the centre of it's movement, to preload it you would be going beyond it's range.


Well, you are depressing a spring and plunger in the valve lifter by tightening the rocker arm nut so preload somewhat fits. Preload doesn't necessarily mean overloaded or out of range.

It's just my visual observation that an additional 1/2 turn on the rocker arm nut doesn't place the lifter plunger anywhere near the center of it's movement. 10% depressed off of it's upper stop maybe at the most.


2003 Mustang Mach 1. 32V 4.6 Liter. Motorcraft Syn Blend 5W30
1970 Mustang Convertible 302-2V Auto (Stock) M/C 10W30
1970 VW Beetle 1600 DP
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