Date: Sun, 8 Feb 2015 11:20:00 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: 2.1 L push rods
In-Reply-To: <CA+az7_7mfdHdMk43rNeWfEc8Y1Y6prgOx34W1W9KsDMzZyWswA@mail.gmail.com>
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If the push rods bent during operation, they are now shorter and there should have been some lifter noise or some indication something was not right unless the valves were adjusted to compensate. Put the rocker shaft in without push rods and use a lever to operate the valves to check for free movement. A stuck one will be obvious. If all good then put it back together correctly, new adjusting screws and adjust the works properly with 1 to 2 turns preload. Do not leave a gap. Put it together, turn the engine over a few times with a wrench to make sure all is god and then fire it up.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of John Rodgers
Sent: Sunday, February 08, 2015 11:00 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: 2.1 L push rods
This is a relative moderate mileage engine - -somewhere around 117,000
to119,000 miles. But I had overheat issue when someone else drove it. That may be when this event occured, no real way to know. At this point I don't know what elese to do for it except to put in new pushrods and hope for the best. Head removal or engine teardown is out of the question for the for-see-able future.
What would you suggeest?
John
On Feb 8, 2015 9:15 AM, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
> Pushrods don’t usually bend from wear or fatigue. On an otherwise well
> running engine the usual culprit is the valves binding in the guides.
> On an engine with mileage this is often a result of overheating. When
> the valves overheat the stems also expand and can jam in the guides.
> The rods can get bent trying to open a valve or a valve hang open and
> the rod can fall out of the rocker or lifter socket. Same can also
> happen from extreme over revving.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf Of John Rodgers
> Sent: Saturday, February 07, 2015 3:23 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: 2.1 L push rods
>
> Finally got around to fixing my pushrod tube leak. Found there was a 4
> inch crack in one tube. Upon disassembly and removal of the push rods,
> I found two of them bent. Probably accounts for the one cracked tube
> at least. On the passenger side, as seen from the rear of the van,
> from back to front, it was the 2nd and 4th push rod.
>
> The engine has run fine, but for the oil leak. But this has to be fixed.
> Anyone have two or four pushrods from a junked 2.1 L that they care
> to part with? Would be much appreciated. My van is down for the count
> as it sits.
>
> Thanks,
>
> John
>
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