Date: Fri, 30 Aug 2002 07:28:12 -0500
Reply-To: tmarciniak@WI.RR.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tim Marciniak <tmarciniak@WI.RR.COM>
Subject: Re: Losing valve lash just after adjustment-why?
In-Reply-To: <OE161Lv7qfI0E1OjWMv0000ec4e@hotmail.com>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
Ok, that makes sense when things warm up but I did not even move the
crankshaft. I think it must be some hydraulic property or the
trapped air in the lifter problem.
Tim
>.006 cold lash adjustment turns into zero or so when warm......Things expand
>in the motor and take up that clearance..........
>Adam P
>81 Westy "The Brick "
>70 Single Cab "Whitey"
>74 Beetle "Ol Yeller"
>73 Transporter (STILL at paint shop)
>1988 Vanagon Wolfsburg
>75 Campmobile "for sale'
>Used Vanagon Parts for sale (mostly aircooled)
>----- Original Message -----
>From: "Mark Ingalls" <ingalls_mark@HOTMAIL.COM>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Friday, August 30, 2002 7:16 AM
>Subject: Re: Losing valve lash just after adjustment-why?
>
>
>> Please keep us informed on what you find out about this. I plan to go to
>> .006 soon.
>>
>> Thanks,
>> Mark Ingalls
>> 85 GL
>>
>>
>> >From: Tim Marciniak <tmarciniak@WI.RR.COM>
>> >Reply-To: tmarciniak@WI.RR.COM
>> >To: vanagon@GERRY.VANAGON.COM
>> >Subject: Losing valve lash just after adjustment-why?
>> >Date: Thu, 29 Aug 2002 20:38:37 -0500
>> >
>> >Just did a compression test and two cylinders were low @ 100 and 106.
>> >Heads done about 20,000 miles ago by a VW mechanic (not dealer). Van
>> >has ran pretty well since them but lately I have developed a lumpy
>> >idle and low manifold vacuum (10-12). I researched everything I
>> >could find on the age old valve lifter issue including a call to Bob
>> >at Boston Engine were I purchased my heads from. Followed his
>> >instructions and adjusted the valves to .006 inch valve lash. I
>> >adjusted both intake and exhaust when engine cold. Just to be really
>> >thorough I rechecked them almost immediately after I adjusted them
>> >(did not rotate the crank yet) and I swear I was back to zero
>> >clearance so I readjusted again but did not recheck again cause i
>> >wanted to finish and the mosquitos were really bad last nite. I also
>> >checked all the valves for clearance before I adjusted and I could
>> >not get a .006 inch feeler gauge in on any of them--I am suspected my
>> >mechanic may of installed these heads the old way (preloading) and I
>> >am starting to see problems now. My question is why did I lose this
>> >.006 inch clearance just moments after I made the adjustment?
>> >
>> >I did start the engine up after adjusting all the valves and it ran
>> >pretty much the same, initially the manifold vacuum was about 14 but
>> >then dropped to 11-12 after the engine warmed up and idle was lumpy.
>> >
>> >Could it be the lifters are doing something strange? I am running
>> >20W-50 for the summer.
>> >
>> >Tim
>> >--
>>
>>
>>
>>
>> Mark Ingalls
>> Nebraska City
>> 85 GL w/ dash mounted digi-tool, H4s with relays, Agilis tires, needs a
>> stereo.....
>>
>>
>> _________________________________________________________________
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>>
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