Nice piece of kit tobydog.
The whole story of how I ended up here goes like this (those of you who are more experienced in these things will probably roll your eyes at my naivety!) – it's not as interesting as many of the theads on here, but there may be something in it that helps somebody at some stage…….
- rear left manifold breaks, head has studs so can’t slide manifold off studs without removing thermostat housing (early DG remember), thermo housing comes off water pump OK without having to remove the pump. Order new manifold.
- got bored waiting for new manifold to turn up so I started to clean the crud up in the pulley area and notice the water pipe from pump to right-hand head has no gap between it and the crank pulley. That’s odd as I’d not heard any noises from that area, so remove the water pipe and find these marks ….
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- Checked for any excessive end float on the crank, none detected. Ordered new pipe and water pump (as I’d come this far is seemed silly not to replace it)
- New stuff arrives. Out of interest tried to fit the new water pipe to the still in-situ old water pump and I couldn’t get the new pipe to fit fully because it’s up against the crank pulley. Test fit the new pipe and the new water pipe and hey-presto, I have a gap between the pipe and pulley. Compared the new pump to the old pump and notice that the machined face that the water pipe fits on to is a few millimetres further out placing the pipe closer to the pulley. See photo (old pump on left)……
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- This didn’t explain why the old pump, which looked to be old but in good condition, should suddenly become a problem. Anyway, reassembled everything, started engine only to hear a loud clanking noise from the pulley area. Checked pulley-to-pipe clearance – there’s none again!
- Checked the pulley was not loose, it wasn’t but I could detect a small rotation of the pulley even though the bolt was tight. Removed bolt, pulley very sloppy on crank shaft and woodruff key is worn. This picture below shows the wear ridge in the pulley sleeve which allows for a large amount of movement on the shaft. It’s 2/3 of the way down the sleeve because that’s as far as the shaft goes in, the pulley is in effect a short distance away from the end of the shaft so there must be some leverage from the fan belt. I guess it was extended out that way to allow the water pipe to go behind the pulley without extending the crank shaft (?).....
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- Decide I’m going to have to replace the crank seal I start cleaning up round the seal lip and spotted small bits of metal. Went further in with a cotton bud and found a half moon slither of metal (see first picture), so removed oil thrower to find the middle was damaged as in first photo.
I’ve only done maybe less than 300 miles since buying the van and can’t believe that this has all happened in that time. I can only think this may be linked to the tension of the fan belt over a period of time?
Now waiting for more new bits and praying there's no more problems to be found.