Valve spring lenth Square 4 mark 2

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DrewNolan
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Valve spring lenth Square 4 mark 2

Postby DrewNolan » Thu Aug 24, 2017 9:25 am

Hi All.
Is there any difference in valve spring length on the Mark 2 compared to Mark 1.

The new springs measure ,Outer 44.5 x 29 mm , inner 39 x 19 mm, that I have brought.

The old springs measure on average ,Outer 40.4 x 28.7 inner 36.7 x 19.7.

The easiest way to clean the rocker spindles was explained by a member using a strand of brake cable , thank you.

When blowing out spindles there were small bubbles coming out of the alloy plug at end of spindles , I think they may be pressed in , not game to drill them out.
Cheers Drew

DrewNolan
Posts: 13
Joined: Thu Mar 09, 2017 7:32 pm
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Re: Valve spring lenth Square 4 mark 2

Postby DrewNolan » Thu Aug 24, 2017 9:27 am

all measurements are O/D
Drew

david.anderson
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Holder of a Golden Anorak
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Re: Valve spring lenth Square 4 mark 2

Postby david.anderson » Thu Aug 24, 2017 10:53 am

From the table below you can see that there are 2 different mk1 valve spring sets and 2 different mk2 valve spring sets. The VS455 being used on 1950-53 mk1 and on 53-54 mk2. The VS518 set used on the later mk2 uses different top collars and the spring set is designed to use a steel umbrella type valve guide seal.


sqare 4 year Outer Inner part no
4G/MK I 1937-49 1.750 1.500 VS 264
MK I/II 1950-54 1.625 1.500 VS 455
MK II 1955-58 1.625 1.560 VS 518
David

DrewNolan
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Joined: Thu Mar 09, 2017 7:32 pm
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Re: Valve spring lenth Square 4 mark 2

Postby DrewNolan » Sat Aug 26, 2017 12:52 pm

Cheers David.
Drew


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