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Join Date: Aug 1999
Location: Gresham, Oregon USA
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Valve Train Noise ?

My "76" has started to make what sounds like Valve train noise's. They need to be adjusted. Question * Is it dangerous to drive it while the valve's are "clacking" ? Is adjusting them hard to do ? What is the best why to turn the engine over to TDC and then to rotate it when you need to move to the next valve.? Where ont the engine do i locate TDC ? Thanks Guys !
Old 12-21-1999, 10:46 AM
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There is a great tech article on this website that covers the procedure and is well illustrated. Check it out.
Old 12-21-1999, 12:04 PM
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Try this:
www.pelicanparts.com/techarticles/914_valve_adjust/914_valve_adjust.htm

The asumption that the valves are loose isn't always right. If the valves are actually getting tight (some may loosen while others "stretch" or tighten) it is likely you will burn a valve or drop a seat. After the valve adjustment do a compresion check to see if any of the valves are burnt. Also a good indicator of a valve that is about to loose a head is it will be much tighter than the rest of the valves. A dropped seat causes a VERY loose valve.

The noise can also come from a rare failure like a rocker shaft nut backing out.

If the car still has 75-76 exhaust on it, it will be a little more of a pain to adjust the valves but not THAT bad. Also if the adjustment hasn't been done for a long time the adjusters may need replacing. At $1.00 each it would be a good thing to do if you don't know how old they are.
Old 12-21-1999, 12:27 PM
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Hey also check for exhaust leaks! Sometimes they mimic valve noise. Make sure you have all the studs and nuts and they are snug. Never hurts!
Old 12-21-1999, 05:26 PM
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Depending on how the clacking started.

If it just started to get louder, and I mean loud, over a couple of ten miles and just one valve seems to be out of adjustment when you get around to it. You have the unfortunate pleasure of having a detonated lifter/cam follower. Could be bad or freaking awful!
By the time it gets to this point you usually need to at least replace the cam and follower. You got the case open? Do the whole thing! Crank & rod bearings, rings, heads, clutch...

Sorry, I'm still bitter about when my motor did this to me.

Oh well, slapped on a big bore kit(originally 1.7L now 1.95L), put in a med/mild cam, heads and barrels to 10:1 compression, port & polish (just a bit), and 40mm Dellortos...

Scared yet?

It happened to me, it could happen to you.

------------------
CWP/VIR
72 914 L20E 1.9L
73 914 L20E 2.0L

Old 12-23-1999, 11:46 PM
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