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Valve Retainer Hairline Crack
Doing a routine valve adjustment and noticed a small hairline crack in one of the exhaust valve retainers. Has anyone experienced something like this? I'm guessing that it would be a good idea to do a compression check and or a leak down on the engine to see if there is any valve damage? Any other advice? Engine is a 2.2E built to S specs. Has anyone experienced a retainer cracking due to material failure or is it usually a result of an over-rev with valve piston contact. If things check out with the valve, is it possible to replace the retainer without dropping the motor? Special spring compressor tool?
Thanks in advance. |
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08-25-2016, 06:23 PM
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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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Removing the valve spring with the motor in place is commonly done. A spark plug adapter hooked to an air compressor keeps the valves in place.
I have seen a tool specifically designed for 911s to remove the valve spring with the cam still in place.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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08-25-2016, 07:48 PM
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Gordon, Thanks for the reply. Hope to do a compression test this weekend. If it passes. Then time to replace the retainer. Any idea of the manufacturer of that spring compressor? Looks like some use the case studs as a fixture.
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08-26-2016, 01:57 PM
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Join Date: Jun 2002
Posts: 889
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Just purchased the valve spring compressor ( intake) from our host. I have the heads removed from the cam tower but I don't see how it will work with the head separated
from the tower. Anyone? |
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08-26-2016, 07:12 PM
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I am my 911's PO
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It won't work without the cam carrier attached since it mounts on the valve cover studs. It's a great tool and about the only way to remove the springs with the engine in the car but does not work on a bare head.
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08-27-2016, 07:27 AM
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Does our host sell this particular unit? I'd love to be able to swap out the retainer without a partial tear down.
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08-27-2016, 10:47 AM
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abides.
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Pel-tol-p7e
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Graham 1984 Carrera Targa |
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08-27-2016, 11:33 AM
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Graham, Thanks. Was wondering if that was the correct one. Looks like a easy tool to use.
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08-27-2016, 02:29 PM
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I am my 911's PO
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Be aware there are 2 tools. One for intake and another for exhaust.
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08-27-2016, 03:45 PM
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Yes, I saw that. It's the exhaust side I'm concerned about, but I'll probably get both to keep in the toolbox.
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08-27-2016, 05:24 PM
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My Garage
1971 Porsche 911
Baja Bug
street car
tow vehicle
track car
1984 Porsche Carrera Targa
