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when to do valve adjustment post top end rebuild
I had the top end redone to tackle oil leaks (rockers, seals, new valve guides and valves etc
what is the advice with regards to break in prior to valve adjustment/oil change...i ve heard anywhere from 800 miles to 3000 miles? |
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07-10-2019, 04:27 AM
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Join Date: Oct 2013
Location: Prescott, AZ
Posts: 1,062
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It depends whether piston rings were changed. With new rings, you are normally running a break-in type of oil that should be changed after a short interval. If the work was just head work (valve grind, guides, seals) then it's pretty much normal maintenance schedule.
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1990 964 Coupe 1986 Carrera 3.2 Targa |
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07-10-2019, 06:04 AM
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yes, rings were also done, cylinders honed. I ve had limited driving opportunity this year so only 600 Miles on the rebuild so far
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07-10-2019, 06:21 AM
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forgot to mention, followed instructions to stay below 4K rpm for first 500 miles and use engine breaking etc to seat the rings...now am permitted to go to 5K rpm.
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07-10-2019, 06:26 AM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Change it after 500 then again at 1000.
I would adjust valves then, plus check the head stud torque. Why keep under 5K?
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage Last edited by Trackrash; 07-10-2019 at 01:16 PM.. |
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07-10-2019, 12:06 PM
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Porsche 911 S Modified
My Garage
1971 Porsche 911
Baja Bug
