 Rocker shaft to rocker arm clearance, Is there a spec? |
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| Woody |
 Jul 30 2013, 07:37 AM
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Sandbox Rabblerouser and head toilet scrubber  Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region  |
This is on a /4 2056. I've been chasing a noise that I believe is coming from the top end. It only occurs at idle and will completely disappear right off idle. It sounds like really loud valve clatter. Valves were recently adjusted and were not too far out of spec, Maybe a little bit tight. Noise was present before the valve adjust. On startup it is pretty bad, as the oil heats up it gets worse, but when the engine is at full operating temp after a 30 minute drive the noise is gone. I pulled the rockers and shafts to inspect for wear. The rocker shafts show some wear visually and measure at or just below spec at 19.94mm or .785". Haynes shows the spec at 19.95-19.97 mm. The shafts are not ovaled. The rocker arms measure out at 20.02 inside diameter or .788" and also are not ovaled. Does anyone know what the clearance is supposed to be?
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Posts in this topic
Woody Rocker shaft to rocker arm clearance Jul 30 2013, 07:37 AM
Woody :confused: Jul 30 2013, 03:31 PM Racer Chris ALL the load is on one side of the shafts and the ... Jul 30 2013, 06:08 PM Woody There is some minor scoring but they still measure... Jul 30 2013, 06:09 PM Woody These are the rocker shafts. There is some wear on... Jul 31 2013, 12:23 PM rick_cv Which pistons did you use for your 2056? Forged? ... Jul 31 2013, 12:32 PM Woody This is a new noise though. It became noticeable a... Jul 31 2013, 12:35 PM Woody Im gonna try some new adjusters. A couple of mine... Jul 31 2013, 02:19 PM r_towle Solid spacers or are you still using the springs? Jul 31 2013, 04:00 PM Woody Springs for now. Jul 31 2013, 05:13 PM r_towle Pushrods tips?
Lifters?
Think about solid spacers... Jul 31 2013, 05:26 PM Woody Just original adjusters. I'm going to replace ... Jul 31 2013, 05:29 PM Woody Pushrods look good. Lifters are webcam. Valve lash... Jul 31 2013, 05:30 PM r_towle solid spaces might be the right thing to do at thi... Jul 31 2013, 05:37 PM r_towle do you have swivel foot adjusters or stock solid o... Jul 31 2013, 05:38 PM Woody Solid adjusters. Who sells the solid spacers? Jul 31 2013, 05:40 PM r_towle http://www.europeanmotorworks.com/vw/type-4-rocker... Jul 31 2013, 05:42 PM Woody Thanks Rich. Gonna have to try that. Jul 31 2013, 05:44 PM r_towle I think of it like this.
You never really know wha... Jul 31 2013, 05:47 PM
Woody
I think of it like this.
You never really know wh... Jul 31 2013, 07:43 PM Woody I need the car together for Saturday. I'll pro... Jul 31 2013, 05:50 PM Woody Well it ended up being bad adjusters. It is absolu... Aug 3 2013, 05:57 PM  |
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