Crankcase Sealant

Singles, twins and fours.
User avatar
simon.holyfield
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 3868
Joined: Mon Oct 17, 2011 11:16 pm
Location: Norfolk
Contact:

Crankcase Sealant

Postby simon.holyfield » Wed Sep 16, 2020 8:58 pm

Quick question before I continue reassembling the W/NG engine.

I don't recall anyone talking about sealant on the crankcase halves. I don't think it's strictly necessary and I don't think Ariel used anything.

What do you all do?
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
http://ariel-square-four.blogspot.com

Simon.Gardiner
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 1083
Joined: Tue Aug 02, 2011 11:37 pm
Location: South West (Bristol-ish)
Contact:

Re: Crankcase Sealant

Postby Simon.Gardiner » Wed Sep 16, 2020 9:06 pm

Not strictly necessary, but Wellseal....

SG
'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)

User avatar
paul.jameson
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 2146
Joined: Wed Oct 12, 2011 3:04 pm
Location: Herefordshire
Contact:

Re: Crankcase Sealant

Postby paul.jameson » Wed Sep 16, 2020 9:08 pm

I think that Ariel did use a sealant - probably a shellac based compound. I tend to use a smear of Hylomar. I don't get leaks from the crankcase half joints because there always seems to be plenty of other places for the oil to escape.
Paul Jameson
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.

User avatar
cmfalco
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 325
Joined: Fri Apr 07, 2017 4:53 pm
Location: U.S.
Contact:

Re: Crankcase Sealant

Postby cmfalco » Thu Sep 17, 2020 3:56 am

Yamabond 4 holds my crankcase halves together. Oh, and a few bolts.

User avatar
john.bebb
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 185
Joined: Mon Sep 02, 2013 1:29 pm
Location: Frinton on Sea, Essex, UK
Contact:

Re: Crankcase Sealant

Postby john.bebb » Thu Oct 01, 2020 4:24 am

Sealant? - identify what the pros use - T. Hamlin & Co use Loctite SI 5699

david.anderson
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 1423
Joined: Mon Mar 28, 2011 4:52 am
Location: south coast NSW Australia
Contact:

Re: Crankcase Sealant

Postby david.anderson » Thu Oct 01, 2020 10:06 am

Over the years I have used Rolls Royce gasket cement (remember when that was available), Hylomar, Silicone rubber and Yamabond or Three bond. All were successful. As Paul stated there are other areas more prone to leakage, the pressed metal sump plate being one. However for non spigotted crankcases such as the 4, I would only use Yamabond or equivalents such as Three bond or Toyota sealant which is more readily available. Locally, the Ford and General Motors dealers mechanics all purchase Toyota sealant (Yamabond equivalent) from the Toyota dealer for their engine work as it has proved to be the only sealant that never results in repair warranty issues due to an oil leak.
David


Return to “Four stroke”

Who is online

Users browsing this forum: No registered users and 17 guests