Engine Rattle

I have a 96 Volvo 850 GLT. On start up some times the top of the engine will
rattle for a few seconds and stop. The oil and filter are ok. Can the oil be
dirty? Can the filter be the wrong one? Can I be using the wrong oil? It
seems this will happen when it is cold outside. Thanks

 

sounds like the hydraulic valve lifters. Oil to thick or the lifters are
worn

 

This happens with my 1995 854T upon starting after sitting for a day or
more without being run. It makes a sound like tappets with insufficient
oil. It stops in ~ 1 - 2 seconds. I've noticed it for ~ 5 years. The
oil and filter have been changed every 5,000 mi. without fail. The car
has 85,000 mi. I suspect it's normal.

Check to make sure you're using the right oil for cold weather.

Rick

 

Thank you for the reply......Jim

 

Rick, I live in Alabama and the weather does get in the 20's only for a short
time. I am using 20w50 vavoline. I will look into using a lower viscosity oil.
I do change my oil and filter every 3,000 miles because of the short
distances I drive. This rattle started when it was cold. Thanks for your
information.........Jim

 

That info clinches it. The early 850 engines had problems with early
hydraulic lifter failure. Post '94 engines have better lifters, but the
oil passages are supposedly still too small. That's why a lot of 850
owners use synthetic or synthetic blend oil. You'd be much better off
with 10W-30 high-quality oil.


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Thank you, I will look into changing to a higher quality synthetic oil........
..Jim

 

consult your manual: it should have a table which viscosity is
permissble for your conditions, and which min. API classification is
needed. Both these are far more important than synthetic vs nn synthetic
arguments.

 

Thank you I have done just that..........Jim

 

As someone else mentioned, it doesn't have to be synthetic, just
high-quality and the right viscosity. Synthetic oil is a double-
edged sword: it keeps those oil passages clean, but often seems to
cause Volvo seal to leak...




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