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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

94 Pontiac Grand Am SE, White Stuff on Dipstick

Q: 
I own a '94 Pontiac Grand Am SE with a 4 cylinder 2.3 liter engine with 106k miles and still runs great. The problem I'm having is on my oil dipstick. When checking the oil I find white coagulated stuff on it as if water was getting into my oil.. When changing the oil I have never found any sign of water in my oil. Yet, every time I look at the dipstick there it is! WHY? While I have your attention; Three minutes after the work day ends my car is the only one in the parking lot. Who's the Fool? Me for warming my car or everyone else? .....Joanne

A: Your complaint is not uncommon to colder regions of the country. That white milky type coagulated stuff is caused by heated oil and water vapor rising and condensing together. Areas known for collection of this coagulated stuff just happens to be at the drip stick tube and valve cover. The condition will pass just as the seasons do. Who's the fool? Allowing an engine to run for a few minutes is, without question, better for the engine. Most of today's engines are bi-metal engines (aluminum and steel). These metals expand at different rates as they heat. Allowing a few minutes for a bi-metal engine to grow, to its designed dimension, without question, will extend engine life. After all don't you stretch out a little before running a marathon?

 
     
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