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914World.com _ 914World Garage _ Pre-diagnosis advice needed

Posted by: cwpeden May 22 2009, 07:11 PM

So driving to work today I notice a sudden increase in valve noise on decel.

It only seems to be coming from one side and possibly one valve. I had a top end rebuild in september, new guides, valves and seats, after dropping a seat. Not as capastophic as some pics I've seen, but it did nick one piston.

Question is: What does a broken ring sound like? If they do sound. And, do seats 'unseat' a bit and make noise?

I've detonated a lifter before so I dont think its that. Just sounds like one valve is suddenly out of adjustment a bit.

Any help on diagnosis is appreciated.

Posted by: cwpeden May 22 2009, 08:01 PM

PS. I'll be doing a compression check tonight

Posted by: Vacca Rabite May 22 2009, 08:15 PM

rocker screw come off? pop the rocer cover and take a look.

Posted by: cwpeden May 23 2009, 11:59 AM

I did a compression check last night and was surprised with 120 pounds across the board. Exactly 120, on all 4!!

Gotta get a new tester. That cant be right.

Dont think its a screw. Would be louder.

I'll open it up and shove in a blank check. That oughta fix it

Posted by: cwpeden May 23 2009, 03:25 PM

Having trouble finding what the compression should be on a stock 2 liter.

Anyone?

Posted by: Dave_Darling May 23 2009, 05:32 PM

Depends on a lot of things. If it gets to 100 PSI and everything is in good shape (e.g., starter and battery) then you start to worry.

120 PSI is fine.

--DD