Home-made Tools and those you've adapted or modified. And also "tips and tricks".

[Peter Truman]

I agree with above concerns, Cast Iron's an unknown quantity, we have a lot of CI water mains still in service after 150 years, some as large as 30in dia, BUT every so often they'll just let go blowing the side out interestingly the raw surface of the damaged section of pipe often shows no sign of corrosion pre failure they just let go!

The large old pipes weren't spun so they can be 3/4in thick to 1.5in as they were horizontally cast, they came out to Aus as ballast in the ships hold when Aussie wool was exported to England.

[Peter Truman]

Seen on eBay last night I assume a Triumph DIY spring compressor to compress the valve spring without removing the head,

Anyone have an idea how it works? just looks like a long valve push rod.

[ahebron]

First thought is you feed it in the sparkplug hole.
But even then I can't see how it would work.
A bit of rope works well  for changing valve springs without removing the head

Edited August 30, 2023 by ahebron

[JohnD]

12 hours ago, Peter Truman said:

Seen on eBay last night I assume a Triumph DIY spring compressor to compress the valve spring without removing the head,

Anyone have an idea how it works? just looks like a long valve push rod.

Irony, irony, they've none of them got the irony!

[Colin Lindsay]

Herald 948s and 1200 don't need a tool for the valve spring anyway, it will push down with finger pressure. Only the double or uprated springs need a compressor.  

[Pete Lewis]

easy to remove the double  springs collets and cap 

fit a socket /piece of hard wood  to support the head of the valve when placed on the bench 

find a nice sized socket to fit over the collets 

give this a good whack  and the collets all jump out 

freeing the valve   you can do all  8 /12 in a few minutes 

you need a  valve spring compressor to refit it all

but its a very safe and quick way to strip a head down 

Pete