So as I've posted before, Im in Australia and 4bt's are not as common nor the bloody parts needed to repair.
Currently replacing the head as I had a suspected cracked head or gasket as cooling system was pressurizing and pushing coolant out. I've had advice that excessive coolant pressure could be related to higher than standard RPM, so any advice on that would be great.
I will be installing a brand new head with ARP head studs and 60lb valve springs but questioning the block surface. Right now, time and $$ just aren't my friend with things in life at the moment so pulling the motor and decking it is not something that I can really manage.... I just need the car running.
Straight edge and feelers see some slight variances around and in between the cylinders. between 0.002 to 0.003 with 0.004 in between cyl 2 & 3 on intake side. Would this be within Cummins spec and ok to use? I have a genuine Cummins std thickness gasket here to use.
Im not fluent in engine rebuilding so go easy. Can spin spanners and RnR with manual guidance and specs but any advice is much appreciated.
Added pics below so feel free to point out any issues or concerns.
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Piston ID
Currently replacing the head as I had a suspected cracked head or gasket as cooling system was pressurizing and pushing coolant out. I've had advice that excessive coolant pressure could be related to higher than standard RPM, so any advice on that would be great.
I will be installing a brand new head with ARP head studs and 60lb valve springs but questioning the block surface. Right now, time and $$ just aren't my friend with things in life at the moment so pulling the motor and decking it is not something that I can really manage.... I just need the car running.
Straight edge and feelers see some slight variances around and in between the cylinders. between 0.002 to 0.003 with 0.004 in between cyl 2 & 3 on intake side. Would this be within Cummins spec and ok to use? I have a genuine Cummins std thickness gasket here to use.
Im not fluent in engine rebuilding so go easy. Can spin spanners and RnR with manual guidance and specs but any advice is much appreciated.
Added pics below so feel free to point out any issues or concerns.




Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Piston ID