Sounds like the chain adjuster is failing. Get some diagnostics on it before you go mechanically inside. If the timing is 25* out, the adjuster has failed. The other possibility is severely worn chain wear pads on the chain adjuster.
This is if its a 5 chain engine.
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
|