In my case, the noise sounds like it's external. On 21 Nov 2001 at 8:53, Michael A. Radtke wrote: > Hello, > > Is it possible that it's a bearing knock? > > When the anti drain back valve fails in the oil filter it is common to get > a couple of thunks from the engine on start before the oil gets going > again. The fix is easy; put in a new oil filter. > > Mike -- Phoenix AZ '84 > > ---------- > From: Michael Radtke X4897[SMTP:michael.radtke@bull.com] > Reply To: michael.radtke@bull.com > Sent: Wednesday, November 21, 2001 7:54 AM > Subject: [Fwd: Thumping when start van] > > > > -------- Original Message -------- > Subject: Thumping when start van > Date: Wed, 21 Nov 2001 05:46:48 -0800 > From: "Greenamyer, William L" <William.Greenamyer@WEST.BOEING.COM> > Reply-To: "Greenamyer, William L" <William.Greenamyer@WEST.BOEING.COM> > To: vanagon@GERRY.VANAGON.COM > > Some of you may have experienced this. The 84GL doesn't do it when I am > trying to listen for the thump. When I start it (maybe 40% of the > time), I > get a single thump and sometimes two thumps. Everything starts fine and > the > van runs pretty good. I am trying to attack some problems still > remaining. > There doesn't seem to be anything loose but I have been wrong on that > before > (and found a bolt or something missing on a bracket). What it sounds > like > is maybe the motor mount is bouncing (for lack of better words to > describe > it). There does not appear to be hard metal contact (like slamming two > bars > together) but it is more like two pieces of metal banging together > through a > piece of rubber. Could the starter be causing this problem? > > William > Shawn Wright http://zuiko.sls.bc.ca/~swright '85 Jetta TD '88 Westy 2.1L |
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