Question about 1994 Cadillac DeVille
Put a good squirt of wahing up liquid into engine oil and half litre of diesel ,then run a while say 300 miles or so then change oil and use turbo diesel engine oil ,now if noise stops then just change oil every 6000 miles with a oil filter every third oil change.but if noise persists then repeat with washing up liquid and diesel and leave for a longer period ,your hydraulic tappets are gummed up from not changing the oil regular ,never mind these so called long life oils ---this is what happens when oil is not changed regular
Posted on Oct 12, 2010
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Posted on Jan 02, 2017
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Here is the oil leaking Problem Identifying Technique
Engine oil leaks from the valve cover gasket are common.
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Fig. Fig. 6: Remove the spark plug wire separators from the valve cover
Fig. Fig. 7: Compress the engine air cleaner-to-valve cover hose clamp with pliers, and slide the clamp back ...
Fig. Fig. 8: ... then disconnect the hose from the valve cover
Fig. Fig. 9: Unfasten the valve cover retainers and remove the valve cover-2.0L SOHC engine
If removing more than one valve lifter (tappet), mark the lifters and their locations as they must be installed in their original bores.
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