Hi Roger it's Malcolm here, take 'oilyhands' advice, he knows. His advice is free but it is worth a lot.
R.I.P. SLR No.27.
Roger, I’ve a valve spring compressor which you are welcome to borrow if you decide to take the head off. Can’t remember if you said you had verniers or not but also have clock gauges c/w brackets if you need to retime them.
Thanks guys, looks like head off then !
And loan of valve spring compressor would be great, thanks David.
any update on your findings?
It's not as simple as a valve cap that has given up? Have had that and it sounded dreadful. It was not very easy to find and I ended up stripping the bottom end before realising what had gone wrong. The collets had simply been forced through the collet.
I have a tool that makes it possible to change springs with the head on. Like sugested, you attach a bracket at each end of the head, a bar through and then you have someting like a deep socket with cuts and a lever something to push with. I apply a soft pressure and knock with a hammer.
Air pressure through the spark plug hole and cranck locked with the given cylinder at TDC. Sounds more complicated than it is.
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The investigation has come to halt due to other priorities as the car is off the road for the winter.
So using air pressure in the cylinder do I need to make up a connection to screw into the plug hole ?
I will update once I make some progress.
Yes, you need to screw something in the plug hole. Remember to lock the engine at the ring gear and to "park" the cylinder you're working on at TDC.