WBX

[itchyfeet]

Yes, ^^^^^
It only fits in four positions so should not be hard to get right but it will need marking.

[silverbullet]

One rivet is offset a few degrees so you cant get it wrong. It will be as good a production tolerances. The rivets are 6.0mm which is the correct tapping size for M7x1
Ask your local friendly machine shop to tap the holes, easy on a Bridgeport BRJ (or similar machine with a reversing spindle motor) and they will be dead square that way.

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[itchyfeet]

Aidan is sending screws
Tap ordered
Mill or pillar drill at work should keep tap square
Will see if it works on an old scrap cam
thanks all.

[Jawin89]

Looking forward to seeing the results

[itchyfeet]

Here is another WBX thought....

Dirko is silcone based.

Where I work we have used Silicone sealants for 20+ years ( we no longer do), they cure slowly by moisture, maybe the first 1-2mm in a day, the second 2mm maybe a week, maybe a month, we have opened assemblies with lots of silicone a year+ later and it's not cured inside.

How many people seal up their heads and turn the key with 24 hours?

I think a fresh rebuild should probably be left a week minimum before starting but this is never mentioned in any manual.

[silverbullet]

I dont know what the solvent is in Dirko or other similar non-acetic acid cure silicone sealants.

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[Jawin89]

Do I get the impression that an experiment with Dirko/ pressure and curing times maybe brewing ?

[silverbullet]

Not by me! Dirko/Reinzosil works, end of discussion

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[itchyfeet]

Yes it works but as a good practice guide I'd say it needs leaving to cure, it's not going to cure the same day.
How many WBX heads come off only because the water jacket is leaking = poor Dirko sealing.
How many WBX are condemned because of the cost of removing heads because of water jacket leaks

[CJH]

Being a devil's advocate, surely the head seals take a lot less than 1-2mm of sealant. If the first 1-2mm cures in 24 hours, won't the thin layer used on the head seals cure much faster?

[ajsimmo]

Not by me! Dirko/Reinzosil works, end of discussion

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^^^Whs^^^
This is a non-issue imho. And as CJH says, the original beads are only a couple of mm wide, then they're squashed so thin when assembled, there's no significant thickness to cure through. Then once you've done that you've got a few more hours of assembly/wiring/fluids to do before start up.
So I wouldn't worry about it, but I'd be more concerned with the suitability of the yellow non-setting head nut sealant for oil pumps...

[itchyfeet]

just looked up Dirko s data sheet
it's moisture cure and they say 4mm in 24 hours 50% rel humidity.
Thats misleading becuse in a seal the moisture can only get in from the small edges so may take longer, on the other hand it takes some moisture from the surfaces before you apply it.
the water jacket seal to head must be 10mm wide and the water jacket seal to case is probably the same if you count the full distance edge to edge.

So 24 hours is probably a reasonable cure time IMO

A poor seal won't be detected by the person doing it, it appears later as a water jacket seal leak which you can't deny is common.

Remember it's just discussion

[itchyfeet]

So I wouldn't worry about it, but I'd be more concerned with the suitability of the yellow non-setting head nut sealant for oil pumps...

what harm can it do around the pump outlet/inlet, it's pre filter.
used it on the nuts for years with no leaks

[Aidan]

The Wurth RTV silicon I use on the gearbox flanges where there is no paper gasket cures in 10 hours, fully cured in 24hours just as it says on the tin, I've had stuff apart after a day and it has cured fine, I'd be happy to use that on oil pump nuts
I've rebuilt boxes that have been previously sealed with red haematite type sealant and that doesn't go off unless exposed to air so the inner edge isn't set and any excess in the voids is still soft; and those that have been sealed with acetic type silicons suffer from bad etching of the mating faces from the acid, and subsequent water ingress and further corrosion often to inside of case and rust spotting of steel parts, lots of them like that, someone who repaired a good few used white silicon those boxes tend to be very poor - avoid

[silverbullet]

We had a Jag XK box come in and someone had sealed the lid gasket with bathroom sealant. All the gears on the upper mainshaft had gone rusty from the acid atmosphere inside the casing. Ruined.
Do not use "badzimmer dichtstoffe"

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