Maybe the valve piston or the bore it rides in is worn (maybe a ridge, which can make the piston sometimes get stuck). Audi calls them "Variable Valve Timing Actuator", there are 2, "N205", and "N208". Or a stickey "Camshaft Adjustor" itself, which is on the end of the intake camshaft, and another one on the end of the exhaust camshaft, with a
Volvo S40 Timing Belt Replacement Interval. It is important that you change the timing belt (also called a cambelt) in time on your Volvo S40. On this page you will find more information about the timing belt replacement intervals on a Volvo S40. I have collected information about various popular diesel engines and petrol engines from 1996 to 2012.
what you should be asking about is if you should replace the timing chain GUIDES. they are made of plastic and often are the likely part to fail. you're at around the point to be kinda worrying, but not quite. i would say shoot for ~100k. but plenty of b6s have made it far beyond that. drive her nice, change the oil a lot and you should be fine.
Bought it with 63k miles and it now has 89k. Man did my family have a blast. Constant state of Perm-a-grin was my driving experience for 3 awesome years, bragging to my audi weary friends about how this particular audi has a "no-maintenance" timing chain instead of a belt that costs 2k to change every 75 to 100k. And now
Dirty oil is not necessarily the problem, its that the oil is too thick at startup, hence my suggestion to go for something with a very high viscosity index that pumps easily. M1 0w40's VI is 185, much higher than most other 5w40s. There are very few oils suitable for our car that are above 180: M1 0w40: 185.
100 miles before they break. Normally, timing chains are designed to last the life of the car and the rest of the engine. But, the life of the engine is sometimes defined by pistons and valves running into each other when the timing chain breaks. Another failure mode of a timing chain is stretching. That causes the chain to come off the cogs.
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audi s4 timing chain replacement interval
