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Peugeot 306 "hydrolic valve lifter playing up"

Peugeot 306, 1.4l 1998/S.

Just had the car MOT'd and spark plugs changed (as I couldn't find a way of removing more than 1 plug!). On the job sheet/invoice I received it had a comment for the customer along the lines of "sounds like a hydrolic valve lifter is playing up - might want to get it looked at". Now, firstly, I know it should be spelled 'hydraulic'!

Anyway - any suggestions as to what this problem would sound like, and whether my car actually has these? What might the problem actually be (and what would be the fix?)

What is the issue with not doing anything about it?

I have noticed an occasional tapping from the engine which varies with engine speed. I've also noticed a knocking which appears to be most noticable around 1,500 - 2,000rpm in 1st gear. I don't know if this knocking at low revs/speed is actually the tapping.

Thanks

David

Reply to
David Hearn
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I would assume your car has hydraulic tappets. The occasional tapping certainly sounds like it might be from 1 or more tappets. The knocking could be a slightly worn small end. Neither needs immediate fixing, unless they get much worse.

The cure for the tappets is to replace them. Expensive if you get the garage to do it. Personally I wouldn't bother, unless it was particularly prominent and annoying.

The small end, if that's what it is, could carry on like that for the life of the car, and neither fault is likely to result in a breakdown.

Light tapping from hydraulic tappets is certainly nothing to be particularly concerned about. My own car sounds tappety until the engine warms up. Mike.

Reply to
Mike G

cam followers which can and do wear ( out) Get a mechanic who can spell hydraulic to lift the lid off and check and reset the tappets. If it starts up again then it will be a cam follower. steve the grease

Reply to
R L Driver

Doesn't the cam turn twice the speed of the crank? If so, try to work out the frequency of the tapping - if it's twice the engine rpm then it's something to do with the valve gear. A worn camshaft can make a car sound tappetty too and is easily identified.

Reply to
adder

I sincerely hope not. That would be a most unusual fault. ;-)

Reply to
Dave Plowman (News)

No, half the speed of the crank as anyone with even basic understanding of the four stroke engine cycle would know.

Reply to
Dave Baker

Half the speed.....

Tim..

Reply to
Tim (Remove NOSPAM.

The message from "Dave Plowman (News)" contains these words:

Seriously variable valve timing!

Reply to
Guy King

It was somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember " Tim \(Remove NOSPAM." saying something like:

Twice the fun....

Reply to
Grimly Curmudgeon

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