TED Replacement Cylinder Head
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julesl2000
- Posts: 1
- Joined: Wed Jun 21, 2023 8:53 am
TED Replacement Cylinder Head
Hi Everyone thanks for letting me join. I have just purchased a replacement cylinder head for my TVO T20. It was advertised as a TED cylinder head. Having removed the head from my tractor I have now found the replacement I have purchased is about 8mm taller, it also has a bolt on the top in the centre and mine has what looks like a lead insert that is stamped with a number 7. If I put the replacement head on the pushrods are not long enough. Can anyone tell me if there are different cylinder heads and if so what is the one I have purchased if it is not for a TVO tractor? Many thanks
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patrickblue
- Posts: 6
- Joined: Mon Sep 01, 2025 11:47 am
Re: TED Replacement Cylinder Head
This reply is so long after the event that it'll be useless to you. However it might be of use to someone else with the same query, as there doesn't seem to be much info online about it.
Firstly the bolt in the centre is a plumbing adaptor which has been used to replace the white metal original seal which is prone to leaking (the part you say looks like a lead insert).
As for the height, I also have exactly the same issue, and after lots of searching have concluded that my TVO has had a petrol engine fitted sometime in the past.
I'm now replacing it with an engine that neither I or the seller knew if it was petrol or TVO. This engine was sold to me with the head off and two head studs missing. I've now concluded this is a TVO engine. My first problem was the head studs from my old engine (the petrol one) were a lot shorter. I did just about manage to get away with the commonly sold 132mm ones, although the nuts only have about 95% of the thread on the studs. The next issue is the pushrods, again too short.
I have managed to get the correct clearances on the valves, but again, only just, as the rocker arm adjusters are screwed right down. I'm not too happy with this and will try and find a set of the longer pushrods.
So in answer to your query, I imagine like me your TVO has had a petrol engine put in in the past, as they're near enough identical. The head you have bought is correct for a TVO, but if you can change it for a petrol one that will be the same as your old one.
The TVO head is thicker as it has deeper combustion chambers to lower the compression ratio, so if you want to run it on TVO you'll be better of finding longer head studs and pushrods. If you only intend to run on petrol, you'll be better of getting a petrol only head.
Firstly the bolt in the centre is a plumbing adaptor which has been used to replace the white metal original seal which is prone to leaking (the part you say looks like a lead insert).
As for the height, I also have exactly the same issue, and after lots of searching have concluded that my TVO has had a petrol engine fitted sometime in the past.
I'm now replacing it with an engine that neither I or the seller knew if it was petrol or TVO. This engine was sold to me with the head off and two head studs missing. I've now concluded this is a TVO engine. My first problem was the head studs from my old engine (the petrol one) were a lot shorter. I did just about manage to get away with the commonly sold 132mm ones, although the nuts only have about 95% of the thread on the studs. The next issue is the pushrods, again too short.
I have managed to get the correct clearances on the valves, but again, only just, as the rocker arm adjusters are screwed right down. I'm not too happy with this and will try and find a set of the longer pushrods.
So in answer to your query, I imagine like me your TVO has had a petrol engine put in in the past, as they're near enough identical. The head you have bought is correct for a TVO, but if you can change it for a petrol one that will be the same as your old one.
The TVO head is thicker as it has deeper combustion chambers to lower the compression ratio, so if you want to run it on TVO you'll be better of finding longer head studs and pushrods. If you only intend to run on petrol, you'll be better of getting a petrol only head.