Quote:
Originally Posted by -tWv-
Got the report back from the shop today. Looks like everything looks good from a mechanical perspective on the timing. Unfortunately, that means there’s some sort of deeper issue and the mechanic thinks it has to be the timing chain actuator/tensioner. Unfortunately this part alone is over $1200 and it’s about 10 hours of labor to put it in. Bill just over $3k  ....
I’m going to go ahead with it because his analysis makes sense from what I’m feeling with the car. It starts and drives just fine so I don’t think I’m getting a consistent misfire. It seems like it occurs in specific gears/rev ranges and just feels like the car is very low on power. My assumption is this is occurring due to one cylinder bank advancing/retarding valve timing and the other not acting similarly. He’s going to work through getting to the cams and will report if there’s something simpler going on (ex: the plastic guides on the tensioner failed instead of the whole part).
Hopefully this is it and I can get out on the Blue Ridge Parkway in the next couple weeks. Wish me luck. |
When your mechanic is talking about the timing chain tensioner/actuator (so you and I are on the same page). I am going to assume he means the Variocam actuators.
Did he test the function of the actuator??
I can test the function of mine with my Foxwell scanner.
I run the RPM's up to I think it is 1500 RPM and I watch the exhaust cams jump in advance by 25 degrees.
Or I go to the testing functions and actuate them with the scanner and The engine responds differently so I know if they are working or not.
Your mechanic should be able to verify if the actuators are functioning or not
As you stated:
There are wear pads on the actuators so if they are worn out the actuators can be fine and still not advance the cams properly.
Wear pads are cheap actuators expensive.
Hope this info is of some help.
Keep us posted with the out come.
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