Cylinder Head Caution for Mercedes M112 and M113 Engines

Motor Oil Fact or Fiction
There are a lot of rumors about motor oil out there. But which stories are true and which are simply myths? This article will tackle four of the most common oil anecdotes and explain whether each is fact or fiction....

Chrysler 3.7L Throttle Body 'Whistle-Like Sounds'
Whistling sounds have been reported coming from some 2007 Chrysler 3.7L engines. The intake-to-throttle-body joint may be the cause of the “whistle-like” sound....

Destroking or Decompressing Pistons
A destroked piston is a piston that may have as much as .020˝ or more removed from the top of the piston. This may be done by machining the top of the piston, or reducing the thickness of the head in the original casting....

Engine Whine Sounds at Idle Reported on Some Chrysler 6.1L Engines
This bulletin describes procedures for diagnosing the whine sound, and if necessary, recommending an oil viscosity change with addition of an oil viscosity label attached to the engine cover....

Oil Leak From Front Timing Cover Reported on Some 2005-2006 Toyota 2GR-FE Engines
Customers may complain that some 2005 - 2006 model year Toyota vehicles equipped with the 2GR-FE engine display evidence of a small oil leak, located where the Bank 1 cylinder head, engine block and timing cover meet....