posted September 25, 2007 08:19            

Let me try to help out.
If clearence is .010 warm, I would use .012 for cold. And maybe check the clearences again later with warm engine.

The piston is on the firing stroke when the intake valve closes, and the piston is on top for igition. Rotate the engine until the intake valve closes, and both rocker arms is not moving when turning engine back and fourt. Now you can set both valves on this cylinder.

Anyone please correct me if I have said anything wrong.

posted September 25, 2007 16:27               

quote:

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Originally posted by TK:

Anyone please correct me if I have said anything wrong.

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I agree with the 0.012" cold setting as an initial starting point. Should be around 0.010" when hot and can be checked again then.

Forgive me TK, even though I know what you meant by you description of the cycle but unfortunately it wasn't quite worded correctly. e.g. when inlet valve is closing, piston has just turned at the bottom and is rising on the compression stroke. (both valves closed) and ignition begins near top of stroke. Firing stroke commences when piston is on it's way down again.

STEVE,
You don't need to remove an injector to tell TDC. You can do that by the timing mark and rocker valve combination as far as setting tappets go.

I don't know the firing order of the early Fordsons, but it is likely that they are the same as the Majors which are 1,2,4,3. (Lots of 4 cyl engines are 1,3,4,2 though so I'd make sure of firing order first)

Presuming they are same as majors at 1,2,4,3

You set the tappet gap when both valves are fully closed and the cam followers are on the smallest diameter of the cam. i.e. they are at rest!

So when the exhaust valve has just closed and the inlet is just opening on CYL 4 then that is when you set the gap on Cyl 1.

If you want to turn the engine the least amount of times between each setting, then follow the firing order. That way you would only have to turn the engine 2 full turns to set all 8 valves.

We use the term "rocking" when the exhaust is almost closed and inlet is starting to open.

So when

1 is rocking, set 4

2 is rocking, set 3

4 is rocking, set 1

3 is rocking, set 2

Hope this is all correct. Like TK if anyone needs to correct me, please do so.

Regards,

Rick

posted September 25, 2007 18:17               

Rule of 13.(Rule of 9 on 4 cylinder)

No.1 valve fully open .. Set number 12 .. 1+12=13.
No.2 valve fully open .. Set number 11 .. 2+11=13

and so on through the engine.

As you work through you will see other valves opening in the valve train. When fully open, just check what number it is and set the one that, with it, adds up to 13.

Using this method means you only turn the engine 1 revolution.

Mark each valve with chalk after you have set it.

Note: These rules do not work on a cross flow head, only on heads where valves run: Exhaust - inlet, inlet - exhaust, exhaust inlet, inlet - exhaust, exhaust - inlet, inlet - exhaust. As they are on the Perkins P6, P4, L4, 4.270, 4.236, 6.354 and all E1A Majors.

posted September 26, 2007 01:12               

Stevo

posted September 26, 2007 02:18               

I was half expecting to make a mistake because I was posting during the wee hours of the morning The previous four days were exhausting and I should have been in bed. (I'm going to post in Miscellaneous Forum about what I got up to in those four days and post some photos .... when I get my head together again!)

I never gave it a thought that these old beasts were 6 cylinders as I've never been around one before.

I hadn't heard of that "rule of 13" and "rule of 9" before that I can recall. In my old age, I'll TRY to remember it for the future and will make a note of it and put on file. It's very handy. I'm a qualified Mechanical Engineer with Fitting & Machining trade background but haven't had any tertiary education in Motor Mechanics. Now I'm a sheep farmer with qualifications as Wool Classer.... hehehe

Thanks again for a prompt correction.

Regards,

posted September 26, 2007 02:44               

Just saw your Post after posting mine.

Anyway, coincidentally I answered your question about being a mechanic. Because you come from Ipswich, I wanted to say to you that I have a couple of connections with Ipswich. One I won't mention here as it's a sad one. The other is that a company I worked for, Evans Deakin Industries (EDI) used to have their Marketing Group H.O. at 1644 Ipswich Rd Rocklea. I spent a lot of time back and forth to there. I was the NSW manager for a few years back in the late 70's. Whilst it was only a division of the EDI group, EDI was the largest engineering company in Queensland. I'm sure you remember them. I used to pass through Ipswich a lot when delivering various types of equipment mounted on new trucks, to NSW customers. Are you old enough to remember the 1975 floods? At Rocklea, they had floodwaters to the 1st floor offices. Whole workshop and stores were under water. During the flood they were able to step out of a boat and in through a window to rescue stuff from the 1st floor offices!

Reminiscing again ......

See ya