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I didn't know that.:dunno:The US E28 M5 came with a duplex ( twin chain ) and so the issue of chain replacement is not essential unless there are any obvious signs that suggest otherwise .
Checking the on-line ETK at RealOEM it looks like the tensioner is the same for the B36, but not the B38. It's also the same for the US S14.I didn't know that.:dunno:
Does it then take the same uprated cam chain tensioner as the E34 motors,the S38B36/B38 units ?
While reading up about the S38B35 engine on bmwe34m5.com, they state this motor only got the duplex chain in the final production months (late 1988 & 1989).The US E28 M5 came with a duplex ( twin chain ) and so the issue of chain replacement is not essential unless there are any obvious signs that suggest otherwise .
The m88/3 has a simplex timing chain, so all of your ECE spec E28 M5s and nearly all of the M635CSi have the simplex chain. There were a few M635CSi with the S38B35.While reading up about the S38B35 engine on bmwe34m5.com, they state this motor only got the duplex chain in the final production months (late 1988 & 1989).
Perhaps not all the US E28 M5's had duplex chain systems?
Can anyone clarify this further:dunno: