Removing Head Bolts - Order?

[rdoxenham]

Hi All,

Quick one before I remove the head on my F4R... is there any specific order I should remove the head bolts or is it OK to go in any order?

Potentially stupid question, but thought I'd ask... a search didn't prove successful.

Cheers
Rhys

 

[Dan@SJM]

Reverse order.

 

[rdoxenham]

Thanks a lot...

Tightening sequence:
8,4,1,5,9,
7,3,2,6,10


Removal sequence:
3,7,10,6,2
4,8,9,5,1

 

[Chip-mk1]

Start at the outside edges and work in, but TBH its FAR less crucial than when doing them up, its just good practice really, not actually going to make any realistic difference on an F4R IMHO

 

[rdoxenham]

Cheers!

 

[Chip-mk1]

Thanks a lot...

Tightening sequence:
8,4,1,5,9,
7,3,2,6,10


Removal sequence:
3,7,10,6,2
4,8,9,5,1

Yeah, you spiral outwards to do up, and spiral inwards to undo, like a snail shell is easier way to remember.

 

[rdoxenham]

9 removed, 1 wouldn't budge and I ended up rounding the head on it. FAIL!

 

[Benjiman46]

Makes absolutely no difference, but I always start in the middle and spiral outwards

 

[Budgie]

9 removed, 1 wouldn't budge and I ended up rounding the head on it. FAIL!

Nasty.

Had this a few times.

Either drill bit time if it's a scrap head, or get a nut welded on to the bolt if you want to re- use it.

 

[rdoxenham]

Nasty.

Had this a few times.

Either drill bit time if it's a scrap head, or get a nut welded on to the bolt if you want to re- use it.

Yeah - I was wondering what to do. Will try and weld it first as I do want to re-use it, although if the welds don't hold due to the awkward place I'll try and drill the top of it off.

Thankfully there are no threads in the head itself as far as I can see, so if I can get rid of the top of the bolt I can lift it off and worry about the rest of the thread removal afterwards.

 

[Chip-mk1]

Be VERY careful with swarf if you drill it out etc and want to use the head again.

 

[Dan@SJM]

Put 2 in either side of the sheared one to ease the pressure on it.

 

[rdoxenham]

Be VERY careful with swarf if you drill it out etc and want to use the head again.

Yeah will do. It's going to be ported and polished anyway so I suspect it will be fully cleaned out etc.

Put 2 in either side of the sheared one to ease the pressure on it.

thanks for the suggestion!