Zinc plating

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Re: Zinc plating

by Orlando St.R » Tue Apr 30, 2019 4:19 pm

cass3958 wrote: Tue Apr 30, 2019 2:03 pm They did not consider a little bit of dirty oil left behind would matter that much but it does.
Agreed!

Re: Zinc plating

by cass3958 » Tue Apr 30, 2019 2:03 pm

I suppose they had to give the bottom crank pulley room to rotate with the chain on but also had to get the sump over the top of the cross member.
They could have lowed the centre of the cross member but had ground clearance problems or raised the engine and had bonnet clearance problems.
A compromise I suppose between the two and they did not consider a little bit of dirty oil left behind would matter that much but it does.

Re: Zinc plating

by Orlando St.R » Tue Apr 30, 2019 9:23 am

Yes, it is really annoying. Wonder why they did that?

Re: Zinc plating

by NigelW » Tue Apr 30, 2019 9:16 am

This is the bowl when I took it off with the residual sludge in it, a bit of a design fault on XK engines.
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sump bowl.jpg
sump bowl.jpg (139.05 KiB) Viewed 1458 times

Re: Zinc plating

by cass3958 » Mon Apr 29, 2019 11:34 pm

In your photo Nigel you can clearly see the small bowl I talked about in a previous topic about cleaning the engine. That little bowl to the right sits at the front of the engine and is not drained when you pull the sump plug. It contains about a litre of dirty oil which will remain in the engine when you complete your oil change.

Re: Zinc plating

by NigelW » Mon Apr 29, 2019 4:43 pm

Thanks, it was a real mess! Cleaning up the cylinder head at the moment - another dirty job.

Re: Zinc plating

by Orlando St.R » Mon Apr 29, 2019 3:09 pm

NigelW wrote: Sun Apr 28, 2019 9:22 pm I've just cleaned up the outside of the XJ sump in mine to great effect using Guyson products.
That looks good, Nigel.

Re: Zinc plating

by cass3958 » Sun Apr 28, 2019 11:26 pm

Bicarbonate soda is another good medium to use.

Re: Zinc plating

by NigelW » Sun Apr 28, 2019 9:22 pm

Word of advice on the blast cabinet - don't use sand, major health hazzard! Get hold of glass beads from someone like Guyson or Frost.

https://www.guyson.co.uk/aftersales/guy ... last-media

I've just cleaned up the outside of the XJ sump in mine to great effect using Guyson products.
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XJ sump.jpg
XJ sump.jpg (283.58 KiB) Viewed 2885 times

Re: Zinc plating

by Albion » Sun Apr 28, 2019 8:27 pm

Hi, an update following various attempts at zinc plating. There were instances where results obtained were quite satisfactory, but it was always an attempt and experimenting without guaranteeing success. So I just got tired of trying. Still, it has to be done, and as previously said there are far too many bits as you go along. So, I bought a readily made kit with suitable electrolyte and equipment which should do the trick. Unfortunately because of health hazard they can't supply yellowchromate, so such parts I will have to commission them. Also, I also got a sand blasting cabinet because of the many parts to be zinc plated or painted.

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