AH-4x4

Member

• Aug 30, 2020

• #1

Hi,

Quick question... do you need to use threadlock on the bolts holding down the cylinder head? Replacing the head gasket this morning.

 

Europa486

Well-Known Member

• Aug 30, 2020

• #2

Nope, they are stretch bolts so don’t require it, usually use airline to clean out cylinder block holes and pop straight in, not recommended to oil them in case you get a hydraulic lock, just clean thread on bolts and block,

 

AH-4x4

Member

• Aug 30, 2020

• #3

Ok, thank.... just trying to get the cylinder head bolts out now but not moving. Unsung a 600mm breaker bar put not budging.... as I have the engine out I am physically moving the engine trying to get these bolts out. Any ideas?

 

Europa486

Well-Known Member

• Aug 30, 2020

• #4

Another pair of hands or a luggage/tie down strap to something solid,

 

AH-4x4

Member

• Aug 30, 2020

• #5

Will try plan B.

I take it it’s a big no no to use a impact driver to get them off?

 

Europa486

Well-Known Member

• Aug 30, 2020

• #6

Probably could but unlikely to shift unless it a 3/4 inch air type with a very large compressor,
Strap a 4/2 lump of wood down the side or whip off the flywheel and bolt it the back of the engine,
Will give you something to hold onto,

 

Flossie

Well-Known Member

• Aug 30, 2020

• #7

Try lying the block down on the turbo side.

 

jamesmartin

Well-Known Member

• Aug 30, 2020

• #8

AH-4x4 said:

Will try plan B.

I take it it’s a big no no to use a impact driver to get them off?

Click to expand...

thats what i use for most bolts

 

AH-4x4

Member

• Aug 30, 2020

• #9

jamesmartin said:

thats what i use for most bolts

Click to expand...

Hi James, the impact driver?

 

jamesmartin

Well-Known Member

• Aug 30, 2020

• #10

AH-4x4 said:

Hi James, the impact driver?

Click to expand...

air or battery impact gun

 

EeEk

Well-Known Member

• Aug 31, 2020

• #11

If you cant slacken them just wait until you go to tighten them back up