Check the rear motor mounts crushed or broken mounts can cause this problem . Good mounts are still available at the dealer. The aftermarket ones tend to be too stiff and separate easily.

Dennis 

Sent from my Windows Phone

-----Original Message-----
From: John Goubeaux
Sent: Tuesday, May 31, 2011 6:35 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Follow-up odd noise on new gowesty engine

> So , just to follow up on this thread I determined that the "clunk"
> noise I ( sometimes) hear when starting or stopping the engine is the
> rear exhaust header hitting the rear engine mount bar.  I replaced the
> exhaust headers on the new engine (after marker Danish ones) and along
> with poor quality issues ( one of them had a cracked weld at the flange)
> it looks like the bend on the rear pipe comes too close to the rear
> engine mount allowing it to hit the mount bar. Not sure if I can get a
> muffler guy to fix this or not but at least i know what is causing it.
> 
> I'm surprised no one else has had this problem as well, as I suspect a
> lot of people are using the aftermarket pipes being sold. These were
> purchased from Van Cafe.
> 
> -john
> 
>> Guys,
>>
>> I have roughly 500 + miles on a new GoWesty 2.2 engine that I just
>> installed and am curious about an odd noise it makes, but only when it
>> is warm, eg been brought up to temp. On startup, ie cranking, just
>> before it starts and when turning of the engine there is a small clunk
>> noise. Almost as if before and after  ignition takes place a compression
>> sound as the engine comes to a stop. The engine runs fine and there are
>> no odd noises while running only at start and stop. I have not been able
>> to listen to it back at the engine compartment yet but am planning to do
>> so. Nothing is loose that can explain this and maybe it is a normal
>> sound and is compression on these engines? Oddly it only exhibits this
>> noise when hot though. Could it be a loose head? Sticking valve?
>>
>> Logically I am being very careful to break it in properly and am
>> listening and watching its behavior carefully and want to ensure that
>> this is not something that is going to end up being an issue down the
>> road.
>>
>> Any ideas ?
>>
>> -john