Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

IS A COLD ENGINE DIFFERENT FROM A HOT ENGINE?

April 26, 2017cold different engine hot

0

Posted

IS A COLD ENGINE DIFFERENT FROM A HOT ENGINE?

1 Answer

0

Posted

You bet! When the engine is cold, the oil is thicker. As oil pressure builds, it’s possible for the popoff valve to open and for unfiltered oil to be pumped up to the top end (this is most common with paper or brass oil filters). As soon as the oil makes a trip around the engine, it warms up, the pop-off valve fully closes and debris filtration resumes once again.