Head Gaskets and Valve Covers
Cadillac Fleetwood
Cadillac Brougham

What cause a pinging or tapping sound under the valve covers of a Cadillac Brougham?


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2011-09-13 22:18:21
2011-09-13 22:18:21
engine pingengine pinging can be caused by several different is a list of things to check.

low octane fule.use higher octane fule.

ignition parts .replace spark plugs,ignition wires,distributor cap andignition rotor.check ignition coil.

egr valve not working properly.check diaphragm and vacume line to egr.clean carbonbuild up in the intake manifold between the egr valve and throttle body.

engine running hotter then normal.check antifreeze,thermostat,electric fan,fan clutch.radiator and water pump.

engine timing out of adjustment.have timing corrected, checked for,worn timing belt or chain,worn out distributor shaft,timing adjustment on fly wheel.

===other ping or tap under the valve covers==

sticking lifters, excessive clearances, some parts loose inside the valve covers, pushrod(s) bent

A farmers' method is to take a long screwdriver, put the handle against your ear and the blade against valve cover with engine running (be careful so nothing you wear nor any body parts are caught in the fan and the belts, and that you don't burn yourself on the engine or exhaust headers) - by moving the screwdriver blade front to back on the cover, and even down to the block between exhaust ports, you should be able to hear where the noise is located.


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could be worn rocker arms ( under valve covers ) or lifters

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Under the valve covers, on top of the cylinder heads.

When does it make a tapping noise? When your !) braking and turning wheel B) braking c) engine idling D) starting engine E) turning. I mean it just all depends....

you have to remove the radiator and fans and all the covers and then the alternator will be a piece of cake to pull out and replace

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a tapping sound from under the valve covers at any eng.speed. some eng. have adjastable valves but I sugest you use a repair manal for you car type or have a good mecanic do it for you

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With the engine at operating temperature remove the valve covers. With the engine idling back off on the rocker arm nut until the rocker starts tapping. Tighten the rocker arm slowly until the noise stops. Then tighten it 3/4 of a turn more. Do each one the same and reinstall the valve covers.

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you have to take the valve covers off and remove the cam then take a magnet and pull them out they are shinny so you will see them right off the bat but if you are getting a tapping noise then just use lucas oil stabilizer on your next oil change

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There are four screws under the steering column. Three self tapping screws, and one machine screw. Remove all four. The upper and lower half of the cover are snapped together, and have locating pins to align the two halves. Push the seam of the two cover (along the side of the steering column) while pushing/pulling up on the top cover. Once they pop apart do the other side and remove both covers. When re-assembling, be sure to line up the "pins" from the lower cover to the holes in the upper cover, when snapping it back together. Install the three self tapping screws first, then posistion the covers so the hole for the machine screw lines up with the threads in the lock mechanism, and install the last screw.

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