Had my s60 timing belt replaced by the dealer last week. Started engine the next morning and it was running very rough. Any ideas?

 

Any check engine codes? its possible that something like a vacuum line got disturbed. Did it run correctly when you first got it back?

 

When I saw how rough it was running, I had it towed to the dealer. They told me it was the spark coils. Charged me 1740.00. Don't know how that could happen. Also when I had the belt replaced, I told them it was losing about a quart of coolant a month. They put in stop leak. What kind of dealer does that? Then four days later it lost all coolant and they told me the radiator was clogged. Charged me another 1500.00.

 

$1740 for new coils and plugs is absolutely insane. Parts should be between $500 and $600. Labor is maybe 2 hours including diagnosis.

 

I think the belt slipped because the tension pulley was not right. Ran fine from the dealer. Started the next morning with the problem. I've always heard a belt can slip when you turn off the engine. Really don't know newer cars that well.