I'm not sure this centennial Volvo failure would indicate replacing the tensioner on a MY22 LR defender P400 with 68000mules. I

I'm not convinced this would be wise. Perhaps not.

 

@GavinC Thanks for the great thread with photos. I’m prepping for this job now and I have a few questions. Can you please provide the spanner size (or the Eastwood part number) of that extension wrench you used for the viscous cooling fan nut? I’ve tried searching factory tool number 303-1142 but can’t cross reference a size.

Also, did you spin the engine crank to get the fan belt pulley into the exact position that they ask for in the manual?

 

The LR special tools were hundreds of dollars.

I could not find a pulley holder to match the pattern on the pulley so I used a universal pulley tool to turn the fan belt pulley into the correct position prior to removal.

That worked well but is trickier than having the perfectly size matched tool. Not a big issue once you figure out how to get a good grip. Very doable even for a novice like me.

The fan nut is 36mm.

I was trying to find the link to the tool I ordered but can’t find it.

universal pulley tool and a 36mm spanner.

The spanner has a standard socket square so you can use any torque wrench you have. Just make the appropriate measurements to get the correct torque setting.

The low profile loaner tool from Autozone was also useful.

Im glad the thread is of some use. Hope it all goes smoothly for you. If doing it again I’d pop off that coolant hose I broke prior to doing the job. It comes on and off in 30 seconds and there’s no coolant loss. Just a few drops. You’ll have more room to work.

 

https://www.jbtools.com/lang-tools-3...ch-wrench-set/

This product has two spanners so if you can find one with just the 36mm and the universal
puleybholder you’ll save a few dollars.

Alternatively just by them separate. Loads of options for pulley tools and 36mm fan nut spanners out there.

 

Thanks again. I’ve sourced a 36mm spanner and I’ll probably try making a pulley tool from some scrap flat bar.

I know all about that fragile coolant hose. I busted mine this weekend when I was changing my spark plugs! $200 from my local JLR dealer. Expensive lesson!

 

Great thread. I think the P300 is friendlier on this as there is more space (hopefully!). Quick question: did you get the procedures from TOPIx? Interestingly the P300 manual that I got (which I got from this forum) is missing the sections that cover the fan and the accessory drive belt and if IIRC this was also an issue with the P400 manual on that thread.

 

No I just use the shop manual from the forum. There is probably a reasonably similar overlap between P300 and 400 here. I don't know but the steps are going to be much the same. No sections missing as far as I can tell from doing various items. The instructions for the transmission fluid change were a bit wonky but otherwise it's been good.