Rear Cylinder Head Bolt Removal

photoguy_43420 · Mar 17, 2009

I'm Taking the head off a 74 850 and I'm having some problem with the rear cylinder head nut. Its a really tight fit any tips on how to get this off.

Thanks,
Guy

geo46er · Mar 17, 2009

rear head nut

What problem are you having, getting to it, or finding a wrench to fit it? I just used a Craftsman 13mm combination wrench with the box end slightly enlarged with a small file.
GB

Cookie · Mar 17, 2009

Is that the one you need a box that is really thin or ground down on George?

nidyanazo · Mar 17, 2009

I used a 14mm box-end at an angle...

Seeley920 · Mar 18, 2009

Get a proper 1/4 whit ring spanner....you may have to grind down the outside, as they need to be quite slim.

photoguy_43420 · Mar 18, 2009

I have 1/4 whitworth it just dosn't seem to fit it feel to small. The wrench that fits it the best is a 14mm it's not rounded off. I guess I will try to grind off some of the outer parts of the wrench so it fits better.

Thanks,
Guy

photoguy_43420 · Mar 22, 2009

Do any you have a photo of the wrench that you used? I ground down my 1/4 withworth and I still can't get it fit.

Cookie · Mar 22, 2009

Tools are often different sizes from different manufacturers. A half inch, thirteen mm, can vary a lot. Find one that is a good fit and grind it and bend it to fit your needs.

RennieK · Mar 22, 2009

ludwig said:
I use this :

top quality , slim and thin walled .
But I reduced the nut to 13 mm . ( and the front nuts to 11 mm )
I suggest you do the same , once you get the nut off ...eventually .
good luck !

Jeez Ludwig, looking at how badly bent this box end wrench is I'd say you're torquing your head bolts too much!

They're supposed to be 300 inch LBs. not 300 foot LBs.!

LOL