Accessory drive belt and viscous fan belts. Aka serpentine and fan belts

This serpentine belt is due at 63,000 miles. The fan not till 84,000 but im there so will do both

I’m at 67,500. A bit of an oversight but the belts seemed to be in good shape.

Tricky task. I managed to damage a fragile little coolant line which I will fix in the morning. JB weld will hopefully sort it out till I get the replacement pipe.

*Total cost about $100 for parts and tools and about 3-4 hours work

* excludes cost of my clumsiness.

Steps

• Disconnect battery
• Remove air duct
• Remove fan cowl
• Remove fan. Reverse threaded nut
• Remove fan belt
• Release tension on tensioner and lock into position with a bit
• Remove tensioner
• Install accessory drive belt (serpentine)
• Install tensioner (This is where I cracked the coolant line)
• Release bit to apply tension
• Inspect belt
• Install fan belt and inspect
• Install fan and cowl. Important to adjust your torque setting to allow for any extension used.
• Install Air duct
• Reconnect battery.
• Turn on engine to test.

The electrical connector on the fan attaches to a very weak male receptor in the radiator assembly. Be careful not to break it.



Note the extension doubling the length of the torque wrench. 65 Nm required on fan-nut means setting this wrench to 33 Nm.


The weak coolant pipe from reservoir and radiator to other hose.

Repositioning the fan. It's tricky getting it in and out. Lots of dedicate hoses and radiator fins close by. Torque it down to 65Nm

36mm spanner for fan

A view in with no fan, cowl or belts.

 

I am glad I now know you have the tools for the job. That tensioner sure is a weird looking contraption.
Excellent work.

 

I never new what a tensioner was till I did my homework for this job.

LR have special tools for the pulley and fan bolt as well as a special tool for where I used a drill bit. Any narrow metal rod will do the job.

I also used loaner tool from Autozone.

it was very helpful too.

 

No

Now just waiting for this to set.

layered it in reasonably thick so it will take a while beyond the hour listed on the pack. Hair dryer sped things up nicely

The new part was $68 shipped. Should be here Monday. Got it from a vendor on Amazon.

I didn’t realize how fragile these coolant lines are. hopefully my fix will see us through.

 

hmm... Defender has an electroviscous fan clutch.

Interesting. Wonder what its lockup % is and how much CFM that fan pulls.

Also, I find it quite ridiculous that you have to pull all that crap off of the front of the engine just to change the serpentine belt. In most cars I've ever worked on, all you have to do is loosen the tensioner (the best are the GM style were you just put a 3/8th drive ratchet in the "ear" of the tensioner and pull back on the handle) and pull the belt off.

Ah well.

 

older cars sure are a lot simpler.

This was simple compared to the disassembly needed for the spark plugs.

not much room to work in with the 6 cylinder. I can only imagine the challenge a V8 would present.

 

Yeah, those of us with gorilla mitts struggle with working on any modern vehicle really.

 

I'm assuming pulleys were changed too? bearings don't last really long on those.

 

You assume wrong mate.

That's not listed as a service item. Serpentine belt is due for replacement at 63k, viscous-fan belt at 84k. The instructions state clearly how to loosen the fan belt pulley and pop it back into place. All very clear. in the manual. Same with tensioner. It's not listed as an item to replace either. Being dumb as a box of rocks when it comes to cars, I just stick with what's in the instructions.

 

A tensioner pulley chewed my belt on my old volvo at 100K miles and got me stranded.
Was way less exposed to elements than Land rover setup.