Dominator 7 Head Removal

Are you certain that you have removed all TEN fixings? Including that one underneath at the back?

It sounds a bit late for string down a plug hole ( on compression so as not to bend a valve).

I used to put a bit of 2"x 2" under the exhaust port and give it a whack , carefull of fins which are brittle. As David says ,count the fixings in case you have missed one. Put the whole thing in a bucket of diesel for a few weeks. Its likely that its seized on the front 2 studs. Is the center front bolt out? Where are you?.

Doug. i did the same thing i thought i had removed all the nuts. not the case i had missed two i had to make something up to remove them i hadn't got a suitable socket bar that would do

When you have soaked the top end for a while, you will want to drift the head off the barrel. They will need to be firmly attached to something. Maybe bolt it back on the crank cases?

Paul

Barry.....that's the best use of a piece of Renolds chain I have seen for years. Certainly beats trying to use one on a set of sprockets.

One tip worth trying........soak the whole lot in a large tub of cola (or similar) for 24 hours. Being a mild acid it actually disolves a very thin layer of metal and the rubbish causing chunks to stick (seize) together. You will be surprised at how good this trick of the trade is for helping to release jammed iron joints.

i did the same thing i thought i had removed all the nuts. not the case i had missed two i had to make something up to remove them i hadn't got a suitable socket bar that would do

Philip. i did actally use the chain as a tool. the thing i noticed when i filed it down to fit in the socket it didnt put up much of a fight it was like filing a piece of brass.

Ian. i have removed the metric size it says 5/16 whitworth around the other side of the socket. hope ive redeemed myself

The mild acid in cola drinks is phosphoric acid. It is a lot cheaper to buy it in a form made for the job. I find Jenolite is a good phosphoric acid derusting agent. If you try to buy it from motor factors, they will try to sell you Kurust, a milky liquid which doesn't do it for me. I have to get them to order the Jenolite for me and wait.

Paul

The acid approach should be followed, I had the same problem removing mine after 40 years and removed the bolts and tried a block of wood under the exhaust ports. It did work but it took half of the spigot off one barrel. I had to turn filler rings for the head and mill the remains off the top of the barrel. Wish that I had tried the coke trick it would have saved a lot of time.

(Always wonderedwhere the expression de-coking came from)

Dick

hello so you not tried warming it in the oven in oil bath or large roasting tin on 200 degrees for 20 mins and hit the port hold with a leather hammer never use a steel hammer on engines yours anna j

hello so you not tried warming it in the oven in oil bath or large roasting tin on 200 degrees for 20 mins and hit the port hold with a leather hammer never use a steel hammer on engines yours anna j