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But... before you do, I should point out that the water pump on my M57 diesel is nothing like the water pump on either the M54 or M62/N62 engines.... the M57 water pump has a round boss with two flats, so you can hold it with a regular wrench.... |
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What did you do to / for your E53 today??
Most the cars I've worked on smack the 32mm with a big hammer and get it to break loose no need to hold the clutch.
https://youtu.be/lozXFFwfok8 |
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On the fan clutch; clockwise to come off (wap it), counter to go on.
Might as well repl the thermostat n housing if it's the brittle original. I think the tensioner bolts were 17mm ) a/c tensioner bolt is sorta hidden... |
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That is slick! |
Thanks all - great tips!
But in the end it was a non-event. It wasn't very tight - the fan boss undid easily and just spun off by turning the fan blade. I pulled the rad shroud and removed all the belts, checked all the tensioners/idlers etc. Checked for any play on the water pump, alternator and power steering pulleys/shafts - all good. As was the belt - like new. And I found my noise - the viscous coupling is pooched. Check out this video... https://youtu.be/kdhRraCZorA So I've put it all back together, sans the mech fan and coupling. Boy, is it quiet now, esp. when I shut it down. Instant silence - whereas before there was the grinding of buggered bearings for about 3 seconds after shut down as the fan wound down. As it's winter and I know the aux fan is working, I'll run with no mech fan for a bit but I'll watch the KTMP value like a hawk. Thermostat is an 88DegC. unit, so engine runs pretty cool most of the time Debating the pros and cons of converting to an all electric setup - the cost of the coupling is similar to that of an electric conversion. Will sleep on it.... for quite a few nights. |
You really don't need to hawk eye the temp too much once you verify the elec fan kicks on as it is supposed to.
Warm up the car and turn on the AC then sit while idling it usually just takes a few minutes before the temp gets warm enough for the elec fan to engage. You usually can hear from the cabin. I'm planning to take my mech fans off next winter instead of blocking the fan with cardboard |
I bought the "bmw" tool for removing the fan blade from the water pump. I use it about 1/2 the time and just hit a wrench with a hammer the other times.
Takes to long lining the tool up with the bolt heads on the pulley best I remember. |
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