Shellac for Sealing Crankcase

[NickSR]

Hi Everyone

Sorry not BSA related, my friend is having problems with a Royal Enfield crankcase someone has suggested painting the inside of the crankcase with shellac to seal them?

Any advice would be great.

Regards
Nick

[bsa-bill]

Is shellac stable in an oil rich environment, I visualise it peeling off and gumming up gauzes  and oilways

[trevinoz]

Nick,
             There is a product here known as "crankcase paint".
I know one bloke who uses it in his oil tanks with no problems.
I have seen it used in hydraulic system tanks, also.
Is the oil actually seeping through the aluminium casting or the joints?
I have built several RE single engines and the crankcase joint MUST be sealed with a high quality sealer or oil will seep out of the bolt holes around the actual crank section from the oil tank section.

  Trev.

[NickSR]

Hi Bill & Trev
                 Problem with 1960 Bullit big end bearing only done 10,000 miles by a very well know company in the UK, they have suggest alumimin particales my have caused the wear.

They also have suggested sealing inside the crankcases with shellac?  there is gasket shellac on Ebay UK ?.

To fair to the company they have reduced the cost of the repair by a fair bit.

Again thank you for your advice.

Regards
Nick.

[trevinoz]

Nick,
            The question is, where is the aluminium coming from?
Doesn't seem logical that it is from the cases but more likely the con rod or the oil pump housings.

  Trev.

[NickSR]

Hi Trev
Thanks for your comments, I agree with you its coming from another sourse.

Regards
Nick