I think it's a big job but can be done in a weekend. If you've gone 180K on it I would start to consider and entire rebuild and do it then. A straight forward check is to follow the repair manuals guide for adjusting the cam timing sprocket for a streched chain and if you are in the last hole of adjustment you know it is close to time.
timing belt..how often do you replace
in 6 Cylinder Z Forums
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I think it's a big job but can be done in a weekend. If you've gone 180K on it I would start to consider and entire rebuild and do it then. A straight forward check is to follow the repair manuals guide for adjusting the cam timing sprocket for a streched chain and if you are in the last hole of adjustment you know it is close to time.
Paul