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Old 04-06-2016, 09:06 AM
v8volvo v8volvo is offline
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Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,622
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Sounds like you got a good one.

If the timing belts were recently changed, you may want to do a little bit of looking into who did them and ask about their methods. Depending on how it was done, you may want to double-check the torque on the crank dampener bolt, which requires the use of a special tool that most folks don't have... The required torque on this bolt is around 350#, hard to achieve without the tool, and if not torqued to spec it will allow the timing to slip and crash the valves. It is a fairly common occurrence for a timing belt to get changed and the engine running well afterwards, but then have a disaster come shortly after as a result of insufficient torque on this one bolt. This has even happened to a few folks on here in the relatively recent past.

Not trying to spread fear around, just recommending checking up on this for the sake of peace of mind, since it's easy to do. If you find out that the tool wasn't used, or if you cannot get the info to be sure, you'll want to check the torque on it yourself, which only takes about 15 minutes (have to pull off the fan and shroud for access, 4 nuts and 2 screws). You can borrow the required tools from folks on here for free if needed.

Enjoy!
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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