Date: Fri, 18 Jul 2008 18:34:52 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Different Kind Of Valve Adjustment Question?
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I see there was one repsonse to your post here.
are you staightened out now ?
adjusting hydrualic lifters is a little funny. If they are all properly
pumped up, then the 'take it down to contact, then 1.5 turns further ' makes
fine sense.
if any are not pumped up ..............then they won't feel right.
I have a procedure for those if you want the input.
about there being clearance on one of your cylinders. That shouldn't happen.
I haven't seen it too often, but I have seen at least one case of a damaged
rocker arm, or racker arm screw, or push rod end. . Might want to check
that. ( if you remove the rocker arms, be aware the inner ends of the
pushrods tend to drop down out of position........
need to move them back up to the center of the lifter sometimes, to get
everything in proper position )
there's never suppossed to be vavle clearance in the 'solid lifter' sense.
engine temp doesn't matter on adjusting hydrualic lifters.
the biggest factor is whether each lifter is properly 'charged' with oil or
not.
When I have noisy lifters I first treat the oil with a 'hydrualic valve
lifter cleaner. CD-2 is one brand.
I've had it take up to 2 hours of running for noisy lifters to go away. Even
more for the very last one to get quiet again.
one thing that will contribute to getting noisy lifters is running the
engine for very short periods, Like to back it out of a garage and park it.
Sometimes if you do that 4 tmes..........lifters will get noisy, and it
takes a good while of running to get them all quiet again.
also oil changes are important. And a lifter treatment additive is not a bad
idea if you need it in the oil. I won't mention the brands of oil I don't
recommend.
scott
www.turbovans.com
----- Original Message -----
From: "Max Wellhouse" <dimwittedmoose@CFU.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, July 18, 2008 4:34 AM
Subject: Different Kind Of Valve Adjustment Question?
> In my archival searches for information on adjusting the Vanagon 2.1
> engine's valves, I see a plethora of information about setting them
> at .006, setting them at 1/4 turn preload, 2 turns pre-load etc., but
> those topics are covering fresh rebuilds that have never been started
> before.
>
> I pulled my valve covers off last night to check valve clearances and
> to my surprise, checking #3 first(cuz that's where the engine was
> positioned, the exhaust must've had 1/16th of an inch of clearance
> and the intake about half that. A rainstorm pretty much has
> precluded any further checking, but before I do any further
> adjusting, I'd be curious as to what the list thinks about the
> following items that I've not seen discussed before:
>
> 1. With an engine that has 70-80k on it(Boston Bob rebuild if that
> matters) what should the valve clearances or preload be?
> 2. Should the valve clearances/preload be the same regardless of
> whether the engine is hot or cold?
> 3. Outside of sporadic driving of the van and high mileage, anything
> else jump out at you that might be causing a preload/clearance shift
> oft his magnitude?
>
> Compression was like 115/108/105/120 from 1-4 and maybe a leak down
> test is in order, but first, I'd like to get the clearance issue
> solved before I go any further.
>
> thank you very much in advance!!
>
> DM&FS
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