Peugeot 406 (1999 - 2004) - 2002 2.0 HDI 90 Cambelt SEEM Units

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Tue 29 Apr 2008 15:36
2002 2.0 HDI 90 Cambelt SEEM Units - Whisky
Hi all,

I changed the Cambelt of the 406 about 1000 miles ago but in the absence of a SEEM measuring device I poked it a couple of times and decided it was tight enough. MOT is due in about 2 weeks and I think I may have overtightened it, has a slight whistle between 2500-3000 revs. I seem to remember someone saying that if it twists to 90 degrees its generally ok. Can anyone confirm that? had a quick search on the forum but can't see anything. Going to slacken it off a touch tonight if its dry.
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Tue 29 Apr 2008 16:54
2002 2.0 HDI 90 Cambelt SEEM Units - AndyT
I think the 90 degrees is more relevant to petrol engines, which tend to have a longer belt run from cam to crankshaft, than diesels which have a fuel pump as an addition. Nearer 45 degrees may be more like it, between cam and pump.

It shouldn't be constantly whining, as if it is really tight, and if it can be run with the cover off, it shouldn't be walloping about either, else it's too loose. Imho.
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Tue 29 Apr 2008 17:50
2002 2.0 HDI 90 Cambelt SEEM Units - 659FBE
I would agree with the above, 45 degrees between the cam and pump wheels is about right for these engines - the belt needs to be tight.

Having sneaked around the back of my local Peugeot dealer and seen first hand a mechanic working from a van rebuilding a gearbox on a concrete floor and another mechanic fitting a cambelt to a 106, I can report that the "SEEM" tester was clearly not in evidence.

I bet very few dealers bother to use them.

659.
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