Post #1
Decided to start the car today after a few months of it being stood. It started on first turn of the key and ran fine except for a tapping from near the cam pulley. Switched engine off and re started, still tapped. Gave engine some revs and the noise stopped. Any ideas what this could be? I was under the impression that you get max oil pressure at idle, so what difference did some throttle make?
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displaying posts 1 to 5 of 5
| Author | Subject: tap and oil pressure |
 mjt4130
Regular  Location: hessle Registered: 29 Sep 2009 Posts: 200 Status: Offline |
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 Posted 10th Sep 2011 at 21:18
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pug-gti6
Regular  Location: HAMPSHIRE Registered: 18 Jun 2009 Posts: 120 Status: Offline |
Post #2
Probably because all the oil had drained out of the tappets while it was stood and takes a while for the oil to get up there and fill them up again. Throttle obviously just made it happen a bit faster. ________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 10th Sep 2011 at 21:40
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mjt4130
Regular Location: hessle Registered: 29 Sep 2009 Posts: 200 Status: Offline |
Post #3
Seems fine now |
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Posted 12th Sep 2011 at 21:37
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owain
Seasoned Pro  Location: Essex Registered: 20 May 2009 Posts: 9,185 Status: Offline |
Post #4
What he said ^^^Often happens on cars with hydraulic tappets when they've been sitting, nothing to worry about. ________________________________________ Membership expiring soon, get in contact on our new little forum project. |
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Posted 13th Sep 2011 at 08:22
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #5
You don't get full oil pressure at idle, you can aid the filling of the tappets by blipping the throttle to speed up the oil pump as it's driven off the end of the crank and from memory the pump spins at around half crankshaft speed.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 13th Sep 2011 at 18:04
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