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Peugeot 306 XSi XU10J4R cam belt tension

blahblah

Member
Hi All,

I’ve changed the cam belt, seals and water pump on the 306 and it is fitted with a manual tensioner. Strangely it also has the later single piece cam pulleys that according to Haynes go with a hydraulic tensioner.

Anyway, it’s all gone well but not having a tension measuring tool, I’ve worked on the principle that a quarter twist is about right for tension - can anyone confirm? This is the twist - it may be a bit tight. I think the old belt could twist slightly further.
Picture of belt twist - engine removed for clarity [emoji23] and to change the clutch, do the crank seal etc. Original clutch at 225k km...and water pump - 2000 manufacture date.







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Ken W

1000+ Posts
I set the tension on our BX16Valves which use a similar layout so that on the loosest section of belt, if you twang it you only get a very low frequency vibration that damps out quickly. Don't do it so tight that it sounds like a guitar string.

Cheers, Ken
 

blahblah

Member
Doesn't that tab you have the locking pin in rotate? Giving adjustment of timing?
No, it’s fixed - apparently the earlier version had 3 bolts and slots to allow for adjustment with the manual tensioner.


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Matthew

1000+ Posts
Chris, the tabs on the cam allow for fine adjustment, they can move independently of the cam wheel locked to the cam itself.

I set my inlet forward by half a tooth and it pepped up and whilst he ecu learnt a bit it had a slight rasp at he exhaust.
 

blahblah

Member
Thank you [mention]PeterT [/mention]and [mention]Matthew [/mention]- my bad, see what you mean having a fresh look at it!


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PeterT

1000+ Posts
Here is a view from the back. Many XU10J4R's were fitted with adjustable pulleys. There was one at the wreckers recently I walked past. Someone had already removed one pulley. My '97 306 had fixed pulleys however.
 

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