I read the prior posting about pinging and the possibility of a jumped tooth in the timing belt--My new used 240 turbo pings like that and has a receipt for a new timing belt (out of state) so I'm wonding if there is a way to check for this without tearing out the fan, shroud, etc. Mostly, it pings under hard acceleration and seems to idle just fine.
How to determine if timing belt jumped a tooth
Oct 13, 2003
3 Replies
If you can see the marks on each pully, check them to verify that they align with the reference marks on the belt.
Also, what grade of gasoline are you using? Turbos generally require higher octange; premium at least, or super premium.
Gary
You can check by removing the timing belt cover, though the marks can be difficult to see. One tooth off is all it takes to make quite a difference in performance. Check your timing too, and make sure you run at least 89 octane gas, most 240 Turbos will ping on 87.
Oops, I'm such a tool. I just picked it up today, gassed up with high test and it runs great.
Since I now own a 20 year old volvo, however, I will become a regular with this group.
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