Fergie t20 head

pr_harvey · Aug 15, 2022

Hi, I have a tea20, I ve got to do some work on the engine & in stripping the head off I noticed it s got 5 copper head gaskets stacked up on it. I ve not seen that before & can t think of any good reason it would be a good practice. Amazingly it didn t leak. Any ideas?

I hear heads can be different thicknesses. Do you have head dimensions & corresponding pushrod lengths. I m concerned it could have a short head & long pushrods

Gene Davis (Ga.) · Aug 15, 2022

The cylinder head may have been surface ground more than once to a correct warped condition and needed the additionl gaskets for clearance to keep the valves from hitting the pistons.

pr_harvey · Aug 15, 2022

Good point. Does any Ind know the head sizes so I can measure how far from (stock) it is.

MJ in the UK · Aug 15, 2022

The Feguson TEA20 tractor had a petrol engine only and a lot of farmers here in the UK wanted to
run them on TVO like the rest of their tractors. To get over the problem Ferguson offerd a
convertion to lower the compression of the engine witch consisted of a steel spacer plate and two
head gaskets. The convertion also had a small petrol tank for starting witch mounted at the side
of the battery. MJ.

pr_harvey · Aug 15, 2022

Ah, interesting. Mine could be a tvo then, it has the 2 cap tank and switched fuel tap.

Any way I can tell for sure & should I just put the 5 head gaskets beck on when I re assemble?
I only had to take it off to put in a new end core plug.

Steve@Advance · Aug 15, 2022

I would sure have the head checked for flat!

Running it torqued down on a stack of gaskets would have the potential to warp it or even crack it!

pr_harvey · Aug 16, 2022

(quoted from post at 18:14:27 08/15/22) I would sure have the head checked for flat!

Running it torqued down on a stack of gaskets would have the potential to warp it or even crack it!

I m trying to get some specs for the head & pushrods so I can see if it s within the realms of keeping this head or searching for a replacement.

I have no idea how thick the head is supposed to be.

pr_harvey · Aug 16, 2022

My pushrods are 690mm and my head measures 85mm.

It does look like it s been skimmed before ad the lower edge of the casting is much thinner than the top.

This post was edited by pr_harvey on 08/16/2022 at 06:25 am.

pr_harvey · Aug 23, 2022

(quoted from post at 14:24:03 08/16/22) My pushrods are 690mm and my head measures 85mm.

No one out there know the different head thickness and pushrod lengths on the Ferguson petrol engines???

Update on mine. I put the head back on with a single gasket instead of the 5 it previously had. And unsurprisingly the pushrods won t install. Before I can get the tappet rail all the way down I m locked out on the pushrods and still 2/8th of sn inch off being home.

I ve heard there are 2 lengths of pushrods for the 2 different heads. I m just trying to find those lengths.

Fergie t20 head

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Gene Davis (Ga.)

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MJ in the UK

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