Classic cars forum & vehicle restoration.

Car-Nut · Joined: 06 Feb 2010 Posts: 146 Location: Lancashire

Im changing some gaskets on my G at the moment.

I was speaking to someone sayin I always use Hylomar for gaskets.

They said in all their years they have never used the stuff they just use
grease either side of the gasket..

Veiws, opinions welcome.....
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Car-Nut
'62 S1 Jaguar E-Type 3.8 FHC
'70 420G - 13th from last RHD
'70 420G - 17th from last RHD

Churchill Johnson · Joined: 11 Jan 2011 Posts: 359 Location: Rayleigh Essex

I have used Hylomar which originated from R/R it never sets biggest problem is the gsk or the item the gsk is going onto must i repeat must be oil free as this stuff will not stick to even slightly oily surfaces, to my way of thinking is that if grease is used [my dad always used it] then the gsk soaks up the grease and allows oil to seep through.

Phil - Nottingham · Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham

I always use grease!
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Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2

Car-Nut · Joined: 06 Feb 2010 Posts: 146 Location: Lancashire

Nic Jarman · Posted: Wed May 18, 2011 10:16 pm Post subject:

Machined casing to pressed tin use Hylomar. Machined to machined either grease or Stag. Other seals can be effected using silicone, finger tighten then fully tighten next day. Works for me most of the time.
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1936 Morris 8 Series 1
1973 MGB roadster
1977 MG Midget 1500
Dax Rush

Car-Nut · Joined: 06 Feb 2010 Posts: 146 Location: Lancashire

What is Stag Question

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Car-Nut
'62 S1 Jaguar E-Type 3.8 FHC
'70 420G - 13th from last RHD
'70 420G - 17th from last RHD

Nic Jarman · Posted: Wed May 18, 2011 11:03 pm Post subject:

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1936 Morris 8 Series 1
1973 MGB roadster
1977 MG Midget 1500
Dax Rush

Car-Nut · Joined: 06 Feb 2010 Posts: 146 Location: Lancashire

When I heard the name, the name rang bells from my Uni days

http://www.britishcornershop.co.uk/product.asp?id=7629 Laughing

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Car-Nut
'62 S1 Jaguar E-Type 3.8 FHC
'70 420G - 13th from last RHD
'70 420G - 17th from last RHD

exbmc · Posted: Thu May 19, 2011 7:33 pm Post subject: hylomar

Hylomar was known as SQ32 at RR, and came in three grades, light, medium and heavy. You chose the grade from experience, or sometimes the drawings stated which to use. I think medium is roughly what you can buy at spares shops.
The Stag I used to use in the 60's was a red liquid, which came in a tin and was brush applied. A BMC transverse unit, looked quite good, when built with it, the red joint lines contrasting with the green engine paint.
Don't know if Stag bought up Wellseal or invented it, but it is very good. We use Wellseal to build light aircraft engines now. The parting faces of a Lycoming crankcase have no gasket, just a smear of Wellseal and a couple of lengths of silk thread running round inside the bolt hole line.
Grease is used on the rocker boxes.

RUSTON · Joined: 07 Mar 2011 Posts: 144 Location: Matlock.

Vauxhall/Bedford and David Brown (among others) recommended Wellseal for coating either side of cylinder head gaskets. I tend to use Hylomar, it seals well yet can be easily dismantled should the need arise.

Pete.
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Measure twice...cut once!

Nic Jarman · Posted: Fri May 20, 2011 9:46 pm Post subject:

Scotty · Joined: 23 Nov 2007 Posts: 883

kismet · Joined: 04 May 2011 Posts: 71 Location: South Staffs

I can recommend Wellseal. Was introduced to it by the technicians at Norton Motor Cycles when I was racing with one of their rotary engines in the nineties. It was used in lieu of gaskets for metal-to-metal seals in their engines and I've used it many times since when engine building.

RUSTON · Joined: 07 Mar 2011 Posts: 144 Location: Matlock.