Zetor 7340 / John Deere 2400 specs please

[MB Trac]

Anybody able to help me out with the torque specs on the headbolts and valve clearence specs please. Need to replace one of the head gaskets. Thanks

 

[agrimax]

170 Nm for the head bolts and 0.25mm clearance for both valves.

 

[MB Trac]

170 Nm for the head bolts and 0.25mm clearance for both valves.

Thanks. Would it be advisable to have the head skimmed?

 

[agrimax]

Can't imagine those small individual heads distorting much. Have you one off,or all 4?

 

[MB Trac]

Can't imagine those small individual heads distorting much. Have you one off,or all 4?

That's what I was thinking too. Just one head gasket blowing to the outside. The previous owners replaced all 4 gaskets about 50 hrs ago, but didn't re-torque the heads.

 

[agrimax]

Just check what they torqued them too,to start with,before you retorque them...

 

[MB Trac]

Just check what they torqued them too,to start with,before you retorque them...

Thanks, will do

 

[Mursal]

Did you try to retighten, before stripping down?

12 thou (12 x 2.5 = 0.3mm) in everything as my old boss would say

 

[MB Trac]

Did you try to retighten, before stripping down?

12 thou (12 x 2.5 = 0.3mm) in everything as my old boss would say

Already damaged the gasket, so tightening won't help unfortunately. If only, but not with my luck

 

[Mursal]

Just check the head and block with the back of a hacksaw blade (as a straightedge) and a set of feeler gauges, see can you get them to slip between blade and block / head. After cleaning both surfaced to within an inch of their lives. You'll be happier putting it back knowing its checked.

 

[MB Trac]

Just check the head and block with the back of a hacksaw blade (as a straightedge) and a set of feeler gauges, see can you get them to slip between blade and block / head. After cleaning both surfaced to within an inch of their lives. You'll be happier putting it back knowing its checked.

Thanks, it's tomorrow's project. First time doing replacing a head gasket , hope I don't make it worse.

 

[Wilkster]

Do you know if the head bolts were replaced last time? If not, it might be worth getting new ones as they could have stretched and won’t hold the head down even at the right torque

 

[MB Trac]

Okay, I removed the head. Strange thing is the sump is full of water now after standing for 2 weeks. Did it leak through the gasket down into the sump?

 

[MB Trac]

 

[agrimax]

I don't see a blow between the water gallery and cylinder on this one.Could be a different place on another..Considering you think(or know) the head bolts weren't correctly torqued from before,if it was me.I'd be removing the other heads too and replacing the 4 gaskets. Keep the manifolds on and lift all off in one go. Check heads and block with a straight edge.If you do decide to skim,you may well need thicker gaskets depending on how much is taken off.

 

[MB Trac]

I don't see a blow between the water gallery and cylinder on this one.Could be a different place on another..Considering you think(or know) the head bolts weren't correctly torqued from before,if it was me.I'd be removing the other heads too and replacing the 4 gaskets. Keep the manifolds on and lift all off in one go. Check heads and block with a straight edge.If you do decide to skim,you may well need thicker gaskets depending on how much is taken off.

Thanks. That's what I was thinking too. More work for me then. The previous guys put some sort of copper gasket type crap on it, don't know if that was the correct thing to do?

 

[agrimax]

If the surfaces are perfectly clean and flat, gasket sealant shouldn't be required. I would never use it on a head. Dad always used to smear ordinary grease on head and block but it was just so the used gasket would lift off easily again if he had to go in there again!!

 

[Mursal]

Might be copper grease from the threads?
If you wanted to fill the block with water to see if it runs out the sump plug, before taking the other heads off?
Diesel would be better to find the leak but you know best .........

Was the crown of the piston spotless (no carbon) indicating it was getting water / coolant while running?

 

[spanner]

Put turbo head gaskets on and torque to 180nm

 

[Mursal]

Will that not be a ticker gasket and reduce compression ratio to suit the turbo?