Will "Locktight" do ?

[Jim@sea]

I want to change the Paper Insert Oil Filter on my BMC 2.5 Diesel (Thornycroft) to a new type "Spin On Filter"
Unfortunatly I cant get the studs out of the block to change the housing.
And I only have 1" between the studs and the boat timber so there is not a lot of space.
I have tried putting another nut on top of the existing one but they both turn, as the stud does not want to come out.
I thought that if I cleaned the studs and nuts with Acetone, thus removing any grease, diesel, etc, and then applied "Locktight" put the two nuts on and allowed time for the Locktight to set,
would it "Lock" the nuts to the stud enough to allow me to turn them and withdraw the studs.
Its either that or "Engine Out" (or leave alone and use ancient type filters)
What do you think.

 

[nigelmercier]

If they both turn, they are not tight enough.

And put some PlusGas on the block threads:
http://www.amazon.co.uk/exec/obidos/ASIN/B0001P02S4/dolcetto-21

 

[Steve C Cronin]

If you slid the housing up the studs, how much of them between the housing and the crankcase would be exposed? Enough to get a hacksaw in to cut off the studs and still leave about an inch? If so could you then get a hammer in to "jar the threads"? This is an old mechanics trick to release reluctant threads. It does the block/crankcase no harm but loosens the mild steel stud which can then be removed by severely tightening a Mole Wrench - one of those with really well serrated jaws - on it and smacking it with a hammer to release. All depends upon access of course.

 

[awol]

You need something like

and a long bar. Danger is you totally rubber-duck the stud and it still hasn't come out.

 

[Tranona]

Google Stud Extractor for choice of different tools (including one above, which does work in my experience).

 

[vyv_cox]

Google Stud Extractor for choice of different tools (including one above, which does work in my experience).

+1 for the one in the photo. I have owned one for years, never failed where there is sufficient space to turn it.

 

[lw395]

I expect the stud is loctited in.
The Loctite on two nuts is not going to be any stronger than that.
In the limit, you risk shearing the stud.

Can you heat the block locally?
Or heat the stud. Slowly so the heat soaks in to the block?

 

[CreakyDecks]

What you call "ancient type filters" are still used on motorbikes! They can't be completely obsolete

 

[cryan]

I have used something like this before in a tight situation. http://www.toolstation.com/m/part.html?p=54650
But if two nuts are tight enough together it should work. Remember you only put the spanner on one nut not both together.

 

[padge]

What you call "ancient type filters" are still used on motorbikes! They can't be completely obsolete

the are used on modern ford focus

something to do with reducing waste.

 

[PabloPicasso]

I want to change the Paper Insert Oil Filter on my BMC 2.5 Diesel (Thornycroft) to a new type "Spin On Filter"
Unfortunatly I cant get the studs out of the block to change the housing.
And I only have 1" between the studs and the boat timber so there is not a lot of space.
I have tried putting another nut on top of the existing one but they both turn, as the stud does not want to come out.
I thought that if I cleaned the studs and nuts with Acetone, thus removing any grease, diesel, etc, and then applied "Locktight" put the two nuts on and allowed time for the Locktight to set,
would it "Lock" the nuts to the stud enough to allow me to turn them and withdraw the studs.
Its either that or "Engine Out" (or leave alone and use ancient type filters)
What do you think.

Oh please please just leave it alone. Imagine losing all that sailing time when you could have just changed the filter with the same type? god man. Don't do it. Leave the studs alone

 

[Steve C Cronin]

+1 for the one in the photo. I have owned one for years, never failed where there is sufficient space to turn it.

According to the O P there doesn't seem to be enough working room for one of those!

 

[Jim@sea]

Oh please please just leave it alone. Imagine losing all that sailing time when you could have just changed the filter with the same type? god man. Don't do it. Leave the studs alone

Perhaps I should have tried to source a supply of filters before spending £45 on a conversion kit.
As regards getting a "Stud removel tool" I would buy one and use it but there is not the space and I can only just get a spanner on it.
If it was a "Customers boat" And I had workshop facilities, I would get an electric saw with a hacksaw blade. saw through the lot just below the nuts and pull the housing off. get a blowlamp, heat the studs, put a pair of grips on and remove them. But I am not that brave, and am working with just a tool box with the boat parked up at a marina.

 

[TWINSCREW]

If they both turn, they are not tight enough.

I agree, when trying to remove difficult studs or bolts always "tighten" them first,

 

[boaterbaz]

When using two nuts to remove a stud, the lower nut should be tightened back against the second (top) nut. This puts the load on the correct side of the threads for removal.