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Pulled My First Intake Manifold, Misc. Questions 200 1980

posted by  Volvodad on  Tue Apr 19 13:54 CST 2011
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last visit: Thu Oct 23 16:18 CST 2014
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With all due respect to Goatman, I would leave well enough alone regarding the head removal to get rid of valve deposits. Yours look quite routine for a high mileage engine - I've seen far worse.

Perform a compression test; if the results show all cylinders fairly close (I'd say within 20psi on an old engine like this), you are going to get very little benefit from the effort and expense of removing/replacing the head and having a valve job done. Valve deposits can cause some idling funkiness, and perhaps a tiny impairment of fuel economy, but not worth a big operation to fix.

Some years ago my Volvo dealer tried to interest me in a valve deposit removal process which involved removing the manifold and blasting the intake valves with a mixture of ground-up walnut shells and high pressure air. Maybe this is still available? Anyway, I declined, as it wasn't cheap and the engine was running fine. 100k+ mi later it still is.
--
Bob: son's 81-GL, dtr's '94-940, my 83-DL, 89-745(V8) and 98-S90. Also 77-MGB and some old motorcycles.






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