|30/08/2005 11:58:53||Hi, have you read the text at the site:
Sets valve springs and valve stem oil seals on OHV engines easily, quickly and safely using the rocker arm studs for anchorage. Operates on cylinder heads when removed.
that last sentence... you have to remove the head...
i think :)
|30/08/2005 12:04:21||Steve B||Yes, you are correct, but strangely if you look in the paper catalogue from Machinemart is says the opposite !
The biggest problem is that I can't get the tool to operate in any fashion at all, it just doesn't seem to fit the V4 engine very well.
So I guess the question remains, does anyone know of a suitable tool to replace valve seal with the heads in-situ ?
|30/08/2005 14:02:06||Senor Burt||Maybe it means it _can also_ be used with heads removed.
I've never used one of these, only the ordinary type.
There's nothing unusual about the V4 engine (Quite the opposite it's bog standard Ford). It should work.
|30/08/2005 14:10:14||John Wood||The only one that is supposed to work is Saabs two part tool which has been mentioned in previous posts. One part screws into the spark plug hole and a bent bar is moved to support the valve head and locked off. The other part of the tool is bolted to the rocker arm shaft support post and pressure is placed on the valve spring and retainer to release the collets. I used this type of tool 30+ years ago but with little success, more to technique than the tools capabilty. Some times the retainer needs a sharp tap to release the collets. If you have ever done it on a head off the engine, sometimes it takes some pressure before they will release. I am not sure if East Midlands SAAB Club have one in their collection of tools. I shall enquire for you. I don't have one myself, and maybe it would be worthwhile trying to make one.|
|30/08/2005 15:37:59||simon||Good call this as i need to do one of my cars for the aforemetioned reason.
I was planning on making an adaptor from a compression tester, to hold the valves in place with compressed air. Thus avoiding the need for the Saab tool. Has anyone tryed the air method?
|30/08/2005 15:40:29||simon||I have just read the machine mart ad, and imagine that they refer to the head off, in order to avoid upsetting people when the valves fall into the chamber.|
|01/09/2005 11:46:06||erik||put the cilinder you're working on in tdc, that way you can't "lose" the valve into the cilinder.|
|01/09/2005 12:36:19||Richard||I made my own version of the Saab tool and it works quite well. You do need to tap the retainers with a hammer and you need the piston near tdc but not at it as the bar will not go in. Probably a job for two people as you run out of arms.
You have bet me to it! Just wrote a small artical on it for Al this weekend. Old rubber in engine oil goes like rock eventually, then it cracks up.
|01/09/2005 12:45:55||Richard||Think I may send some photos of my compressor. The Saab item is as John describes.
I have a lever off the rocker support mounting with a ring on the end of it to press on the retainer. Then I have a S shape bar that goes in the plug hole. You then need to have threaded bush that goes in the plug hole and allows the rod to rotate. The bar also needs to have a handle on the outside of the chamber so you can put pressure on it to hold the valve up.
You might get away with just the bar, as the Saab springs are so soft a friend might be able to compress them enough by pushing down on the retainer.
|02/09/2005 22:38:11||Derek||I've just done this in situ with part of the Saab 2 piece kit. i.e. the spark plug adaptor and bent rod was the Saab tool but the spring compressor was home made. Using the bent rod is a black art. It's hard to tell if it's holding the valve up but by the time I got to the last one I seem to have got the knack. It should be easy to shape up a piece of plate to compress the spring. Needs to be fixed at on end using an adjacent stud hole.You can slide a length of nylon cord into the bore with the piston down. Wind the piston back up to secure the valve before compressing the spring. A light but sharp tap on the collet will "unlock" the keepers. If you're accident prone put a bit of cloth round the area in case one jumps out!
Pics of the tools available if wanted.
|02/09/2005 23:09:37||Alistair||Rich, look forward to getting your article, thanks once again mate.|
|07/09/2005 14:27:24||Steve B||Guys,
An update on the valve seal job.
In the end I did it using the Machine-mart tool and some Nylon cord located in the piston bore as Derek suggested. It was tedious (especially the string bit) but it worked really well.
I also had to dismantle the rocker assembly to get the springs and washers out of the way and then reassemble it with the plain shaft in place, in order to use the spring compressing tool.
All back together now, but will it run ??
|07/09/2005 20:54:25||John Wood ( Woody)||Guess we give it a score of 2/10 ?|