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Check a few things....use your nose. (archive)

[ Follow Ups ] [ 3-series (E21) Message Board ] [ Msg. Board FAQ ]

Posted by Lance on September 21, 2001 at 09:30:34:

In Reply to: engine makes loud tapping and popping posted by Need help please on September 21, 2001 at 01:00:18:

Plugs - look for signs of overheating, fouling, and smell of antifreeze.

Coolant - lok for oil floating on top.

Oil - look for creamish color indicating possible coolant leak, and smell of antifreeze.

Tailpipe - look for steam and smell of antifreeze.

These engines are known to be sensitive to overheating: iron block and aluminum head means things expand at different temp/rates. Sounds like a blown head gasket, but possibly head warpage as well. Tapping sounds could be a lot of things. When you pulled over, how long did you let her cool down before refilling with antifreeze?


my car over heated last week from a blown coolant hose. when i noticed my guage hit the red zone i found a place to pull over. meanwhile when i accelerated it made a tapping sound when ever i touched the gas. once pulled over i ran water through radiator to find leak. i fixed my hose (leak) and filled with anti freeze. i got home runnig fine. car runs really hot 2 days later... i see im low on fluid in radiator(water boiled when it got to hot) i filled with antifreeze and runs good. week later and current day when i accelerate with load on engine it makes a poping sound and a loud clicking/ tapping

note: half quart low on oil today


-bill cox

please help me soon





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