J. Schwiebert
Well-known Member
O. K. We have this 9700 that leaks coolant through the cylinder wall. It is the front cylinder. Would you sleeve it or get an exchange short block as it also has oil pressure problems. Thanks for your input. J.
- Thread starter J. Schwiebert
- Start date
Bern
Well-known Member
- Location
- Mount Vernon, WA
Did you locate the cause of the low oil pressure? Those engines are not known for oil pressure issues, but they are famous for the pinhole that you have.
If it were mine, a big part of my decision would hinge on what the rest of the parts look like. If the crank and pistons are OK, I'd sleeve it so I knew what I had. Throw in some new rings and bearings and be on your way. Again, this assumes that you pinpointed the cause of the low oil pressure.
If it were mine, a big part of my decision would hinge on what the rest of the parts look like. If the crank and pistons are OK, I'd sleeve it so I knew what I had. Throw in some new rings and bearings and be on your way. Again, this assumes that you pinpointed the cause of the low oil pressure.
When my tw20 broke the crankshaft my mechanic of all colors said they could rebuild it, but they didn't like the stress it took as it broke the crank and preferred not to.
Thry could order a reman block and transfer the parts over, but they felt of late there are few good blocks left to go through the reman process, and basically I'd be getting what I'm trading off, a block that had a bad case of stress.....
He felt finding a warranted used engine would be best, as that likely never was seriously stressed, and if it needs some rebuilding in a few years I'm still better off than with a questionable block that you kno had something happen to it.
So, we got a good used takeout. It worked for 12 months now, warrant is up, so I guess I just jinxed myself.....
Don't know if I helped any, but if you can identify the problems as Bern says rebuilding what you have lets you know what you have......
Paul
Thry could order a reman block and transfer the parts over, but they felt of late there are few good blocks left to go through the reman process, and basically I'd be getting what I'm trading off, a block that had a bad case of stress.....
He felt finding a warranted used engine would be best, as that likely never was seriously stressed, and if it needs some rebuilding in a few years I'm still better off than with a questionable block that you kno had something happen to it.
So, we got a good used takeout. It worked for 12 months now, warrant is up, so I guess I just jinxed myself.....
Don't know if I helped any, but if you can identify the problems as Bern says rebuilding what you have lets you know what you have......
Paul
Ultradog MN
Well-known Member
- Location
- Twin Cities
I would be more concerned with the oil pressure than the bore cavitation.
Just bore and sleeve the cylinders.
Those 3, 4, 6 cyl Fords are also known for cavitating into the oil galley too. Fills your radiator with oil.
There is a local machinest that fixes that too.
He reams the oil galley and epoxies in a piece of steel tube. Has saved a bunch of those blocks that way.
Just bore and sleeve the cylinders.
Those 3, 4, 6 cyl Fords are also known for cavitating into the oil galley too. Fills your radiator with oil.
There is a local machinest that fixes that too.
He reams the oil galley and epoxies in a piece of steel tube. Has saved a bunch of those blocks that way.
Bern
Well-known Member
- Location
- Mount Vernon, WA
I have worked on more Basildon Fords than I care to recall, and not once have I ever seen, or even heard of, one of these engines cavitating into the oil gallery. I'm not saying it's not possible, I'm just saying it's not likely, including in the case of this 9700. If this really did happen, the OP's radiator would be full of oil, and he did not indicate this.
I've got a 401 block in my shop right now that is pinholed through the cylinder wall in TWO different bores! However, while this block is at the machine shop getting bored and sleeved, having the machinist violate the lifters bores (which he'd have to do if he installs a sleeve in the oil rifle) is the furthest thing from my mind.
Cavitation by definition is caused by piston vibration. It makes no sense to me that a block would pinhole (i.e. cavitate) in the opposite direction.
I've got a 401 block in my shop right now that is pinholed through the cylinder wall in TWO different bores! However, while this block is at the machine shop getting bored and sleeved, having the machinist violate the lifters bores (which he'd have to do if he installs a sleeve in the oil rifle) is the furthest thing from my mind.
Cavitation by definition is caused by piston vibration. It makes no sense to me that a block would pinhole (i.e. cavitate) in the opposite direction.
Ultradog MN
Well-known Member
- Location
- Twin Cities
I'm not going to argue with you Bern.
How bout I give you the phone # of the older gentleman who has been working on engines for 60 years and does all our work?
I'm sure he will tell you differently.
My email is open.
How bout I give you the phone # of the older gentleman who has been working on engines for 60 years and does all our work?
I'm sure he will tell you differently.
My email is open.
Bern
Well-known Member
- Location
- Mount Vernon, WA
E-mail sent. It will be interesting to find out how many of these blocks have been sleeved out of necessity, and how many have been done out of an abundance of caution.
ron miller
Member
Had a 6700 do that to front piston 3000 hrs drilled into the hole and ran a tapperd plug into it snap if off the ground it down 6800 hrs now and it ourer loaded tractor Guy he does build boat motors told us how to do it had it spitt and put in a clutch
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