14 replies to this topic

[Tomf]

Well im stripping down my spear engine, but i cant manage to get the studs out the block that are used to bolt the head down with. When watching the ultimate engine builder dvd it looks like the just use a socket of some sort...

Does anyone have any tips of how to remove them?

[miniboo]

stud extractor OR put two nuts on and tigten them up against each other and get them out that way.

[Dan]

He probably uses a stud remover which is ideal if you don't have to use them again, it damages the threads somewhat. Lock two head nuts against each other on one stud and then turn the lower nut with a spanner as if undo-ing it. The studs shouldn't be tight in any serious way.

[Tomf]

thanks i duno why i didnt think of that i guess its because i saw the dvd and thought there was a special tool for it. ill get them out tomorrow now. Cheers for the advice

[Jupitus]

I used molegrips on most of mine, with the twin nut method for the tighter ones...

[Guess-Works.com]

stud extractors are not expensive and are a very useful piece of kit, would recommend anyone doing an engine to get some...

eg.

http://www.machinema...d-extractor-set

[blacktulip]

i have a set of these and are a godsend, so worth the money IMO.

[Tomf]

Well i went and had a go on the studs that are attatched to the head first and they all came out fine, except when i cam to the last stud, which was one of the thermostat bolts, then when i went to take this out, the bolt just snapped in half, just below the level of the head... whats the best way to fix this? Just drill it out and tap a new hole?

I think ill buy some stud extractor now.

[minimender]

Well i went and had a go on the studs that are attatched to the head first and they all came out fine, except when i cam to the last stud, which was one of the thermostat bolts, then when i went to take this out, the bolt just snapped in half, just below the level of the head... whats the best way to fix this? Just drill it out and tap a new hole?

I think ill buy some stud extractor now.

Those thermostat housing bolts are known for breaking off (the exposed thread in the coolant gets rusty) . You will have to drill it out and tap as you say. Sometimes you are lucky and there is enough left to get mole grips on, then it's a matter of heating it and bashing whats left of the stud whilst trying to twist it free. some times you can screw it in a bit and clean the thread that is exposed to the coolant and soak in WD.
The last one I drilled out I made a mess of and ended up putting a nut and bolt though the hole , thankfully it tightened but it will probably never come off. Hey ho

[Guess-Works.com]

Thing to do with them is, don't rely on a hand operated drill, use a drill press set up square and you can then just run a 'near correct size' drill down the middle and remove all but the threads of the old stud and then use a chaser tape to just clean the threads...

[Tomf]

Yea ill bring it into school and use the drill that have there... Is it a bad idea to skin the head myself? they have the correct machines there, but is it best to just take it to a machine shop and get them to give it a skin?

[miniboo]

if you have the machine then why not. BUT does it need a skim?

[Tomf]

Has anyone had any use with this type of stud remover? how do they work?

[minimender]

Has anyone had any use with this type of stud remover? how do they work?

They work very well, a concentric wheel grips the stud and turns it. Bit of a bugger to get the stud off the device when its come out sometimes, need to put it in a vice at times and twist the other way, but good and easy.

[Tomf]

cheers , the lucky thing is, i have got one of these in my tool box and i didnt have a clue what it was

Ill give it a try tomorrow and see how well it works.