WBX-Unknown

[937carrera]

Down with the T25 first thing and with a bit of luck will be getting the crank looked at by someone later this morning. |I've done a quick measurement of the number 1 main journal area and am less concerned than I was

My confusion is cleared , still learning WBX

I have an early case

First check was there is no second oil pressure switch drilling, then no cut outs for three piece thrust bearing, so what I though was the wider webbing for a late case obviously can't be. I should have gone looking for itchys photos again.

In the process of examining the case I spotted that one of the bearing pins was missing. Oh no. Guessing that it had come out when steam washing the case I went searching on the floor and found what I was looking for. It's a powerful cleaner.



Look, no hole



This is an early case

[itchyfeet]

oil pressure switch is oil filter side
look at the part number on case below pushrods
B suffix is late case

looks late to me

E D I T no it looks early

[itchyfeet]

early late case by Paul_Barr, on Flickr

P1020989 by Paul_Barr, on Flickr



P1090180 by Paul_Barr, on Flickr

[itchyfeet]

I have been looking at this thread on a mobile phone so not studied the pics properly.

I see now you don't have the grooves for the late main bearing and seperate thrust washers or switch ( but switch could have been blanked off)
You have the larger bolt at the top which a late case has.

Strange, I'm going to stick my neck out and say perhaps there was a transition where they introduced some mods to the early case like the larger bolts before the full changeover.

check part number on both case 1/2s and check they are matched there is a 3 digit number stamped on both 1/2s
I think you are right early case but with some features of late case
This should be in a museum

late case thrust washer cutouts

P1050781 by Paul_Barr, on Flickr

your case


if you look at both pics you can see the extra clearance for bigger stroke in reduced wall thickness at the top on mine which is not there on yours so deffo early case.

[937carrera]

This should be in a museum

Oooh , what just are you saying, I'm a s p e c i a l case geddit !

Thanks for reviewing the pictures again, I'm not quite as daft as I thought earlier today.

The case IS an early case, going by the crankcase part numbers, just 025 101 101 and 025 101 102, no suffix, and yet it has the fat web / big bolt on the top, I think that just shows that things aren't as definitive as previously thought, engineering evolution eh. It was interesting reading the US sites as they talk about 1.9 cases and 2.1 /DJ cases, which might make it easier to explain for them, dunno.

I hadn't appreciated the late DG cases were cleared to allow the fitment of the DJ crank, it makes sense to just have one casting , from a production perspective, though from what I had read it's only about 1mm of clearancing that is required. Well done for spotting it in the case photos, I'll need to refer to the modification page for me to know where to look.

I tried to find the 3 digit number to confirm the cases are a matched pair, The only thing I found was was this at the flywheel end of the casting. Is this what you mean ?



On the oil pressure tapping I did look at the other case first, saw nothing and then saw what I thought I recognised from BBB's photos of his filled in drilling so snapped that before I hit the road. Now I have had the time to look properly the pressure sender is on the oil filter exit. I definitely don't have one, and am now wondering what the very similar casting just above is there for. I went to remove the oil filter to have a nosey but it's stuck on, my fluted removal tool has had its first failure.

The crank is now stripped, more updates later, if I get time to do some more measuring and photos.

[itchyfeet]

257 should be both sides

you can drill and tap the case for the oil switch in an early case
somebody has done it CJH maybe can't recall


[/quote]

[937carrera]

257 it is

Oil filter has succumbed to the tool combined with a rag to make it a tighter fit.

[itchyfeet]

Oil filter has succumbed to the tool combined with a rag to make it a tighter fit.

don't understand?

[937carrera]

The flute filter wrench was spinning in the oil filter, the ends were distorted, so I put a t-shirt rage over the end of the filter and then put the flute back on. The additional thickness / friiction from THE rag allowed the filter to be undone. Sorry I didn't do a pic, maybe I'll do an Attenborough and stage the picture for public consumption later.

[937carrera]

The staged photo, rag is between filter and flute wrench

[itchyfeet]

my what a strange tool you have

[937carrera]

There's another thread for that type of comment

[itchyfeet]

you fix endfloat with more endfloat shims
as many as you need

a new bearing will help and the built in thrush washer is worn.
that the benefit of the later design you can fit new thrust washer on outside without stripping case.

[937carrera]

I was just thinking about how to get the endloat back into spec and have been trying to find out the actual width of a new single thrust bearing to compare with mine so I can see how much endfloat will be eliminated simply by the new mains.

I picked up from other posts (but still researching) that there should be a 0.4mm shim plus two others, all of which should have their thickness marked. Well, none of mine is 0.4 and I can't see any measurement on the shims I have. I'm taking that as good news as it means they are all worn.

The shims are currently 0.35, 0.34, 0.26, total 0.95, so with nothing from the new bearings endfloat can come down from 0.38 to 0.13 by use of 3 x 0.4mm shims

I had thought of adding an additional shim, but my instinct tells me that going down that route would mean something else was amiss that I hadn't detected / corrected. Even going 3 x 0.4mm doesn't seem right as from the shim sizes available I suspect there should be 2 x thick and 1 x thin fitted

[itchyfeet]

0.4mm shims are a larger diameter and only used on late engines
I'm not sure if its possible to use them on early it depends if there is clearance to case but I suppose you could fit the smaller ones first

I have asked on fb wbx group if anybody has a new bearing to.measure