Date: Tue, 27 Jul 2004 10:14:44 -0700
Reply-To: Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
Subject: Re: Loud clanking sound from exhaust - pushrod unseated?
In-Reply-To: <b3a1e7ad04072709435c689067@mail.gmail.com>
Content-Type: text/plain; charset="us-ascii"
If you didn't notice a power loss, it's probably not a loose pushrod.
I've had loud noises from the engine bay turn out to be a loose nut that
fell off and into the tin - makes a heck of a racket.
Karl Wolz
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
Behalf Of
> Craig Oda
> Sent: Tuesday, July 27, 2004 9:43 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Loud clanking sound from exhaust - pushrod unseated?
>
> I'm trying to plan out my weekend and upcoming camping trips and am
> trying to get a feel for how much time I'll have to spend to get my
> van back on the road.
>
> I have a loud clanking sound from my engine. It's not the tick from
> lifters. It is considerably louder. There definitely seems like
> metal is rattling around. It appeared to sound like a nut was
> rattling in the exhaust. (I don't think there is one, but it sounded
> like this).
>
> The problem occurred 30 miles from home last weeknd and I drove home
> on the freeway with the loud rattling sound. No power loss and no
> drivability problems. However, the sound is really loud.
>
> Joel Walker was kind enough to suggest that one of the pushrods might
> have come unseated from the lifter. This situation is possible since
> I just changed two lifters about a month ago and had the pushrods out.
> Also, I adjusted the exhaust valve on cylinder 3 considerably. I had
> a problem with air in the lifter and the valve was about 5 turns too
> tight. So, I loosened it up so that it was barely touching, then
> tightened it down about 1 1/2 turns. I wonder if air was still in the
> lifter and somehow the pushrod became unseated.
>
> I may not have time to take out the pushrods until the weekend. If a
> pushrod is unseated, what else should I inspect for damage.
>
> Also, do other people suspect a pushrod? The problem began while I
> was driving on the freeway. I continued driving for another 30 miles,
> so I don't think it's a valve clanking around in the exhaust. I took
> off the u-pipe for the exhaust and there's no metal in there.
>
> My friend wants to drive up to Lake Shasta in a couple of weeks and
> I'm planning the trip, assuming I'll be able to go. However, I
> obviously won't go unless I resolve this engine problem this weekend.
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