Ford M151A1 1967 Restoration.

[Cjhammarstrom]

Oh I see.. well the scratches did not come from the sanding.
But what could happen if I don't replace the crank
Just polishing and put it together

[Horst]

I thought you want to rebuild it and not just throw halfway good parts in it. You will need to bring it to a machine shop and have them polish it. The condition of the journals are beyond trying to fix it with some sandpaper. After polishing you will have to measure the journals and check against the TM if they are still within specification. If not, they need to be turned to oversize crank bearings. If you don't do all this, you might have a low oil pressure.
It might be cheaper to get another crank. I have one that was within limits but I left it at a place with high humidity so it might be rusted and also no good anymore. I will need to check. I will have to get to the place cause Richard was looking for a better valve cover I might also have.

[rickf]

That crank will just tear up new bearings, I can bet the cam journals and bearing look exactly the same. It looks like the engine was run with water in the oil and then left sitting afterwards. The pattern on the main bearing in the picture you put up was from water that had been forced into the bearing while running and then rusted the crankshaft while sitting, leaving that pattern on the bearing. The bearing is probably usable if it is only stained. Be sure to take a good look at the cam bearings though because of they are damaged you will have low oil pressure. It is not economically feasible to buy the special tools to install cam bearings for one job. There is also special knowledge needed for the job. If it needs cam bearings it will need to go to a machine shop so get the honing done at the same time and have them check the valves while they are at it. If you are going to be driving this vehicle a lot it would pay to have hardened valve seats put in for the unleaded gas.

[Cjhammarstrom]

Well actually not the only journal that is looking like that is the one next to the sprocket gear..
It's like the engine have been standing on its side.
But im thinking about buy a new Crancshaft , it is the less expensive option i think.
The camshaft looks ok exept for the missing material on the journal, it looks like it came out like that from the factory.
But do you have any suggestions on that?

[rickf]

Without having a new camshaft to compare it to I am afraid I cannot give any advice on that. As I said, it looks strange to me but Horst said his is the same so they may be made that way, The outer part is still good and also rides on the bearing. Just inspect the bearing very well in the cam bores and if they are good then reuse them. Whenever I put a motor together I always use STP or Motor Honey on the bearings as a prelube to keep them lubricated until the oil flows through the passages. Same with the cam, put the STP on the whole cam. Do not use the special break in lube for cams because that is for new cams and has a different purpose. Something else I always do is once the engine is completely assembled I will take the spark plugs out, put a mechanical oil pressure gauge in at the filter base and then spin the motor with the starter until I get oil pressure and see oil at the top end. This will assure that the engine has oil as soon as it starts and the bearings are not running dry under a load.

Rick

[Horst]

You can have it cheap (plus shipping) as I think your cam is not too good on the bearing surfaces. I also have pushrods.

[Cjhammarstrom]

I need some help to find all the specification measurement on the camshaft and piston.
Cant find them in the manuals on this site, the pages is missing ?

[rickf]

In that closeup of the cam I can see that the notch in question is machined that way. The specifications you are asking for are in the -34 manual.

http://www.g838.org/g838_manuals/TM_9-2 ... an1972.pdf

[Cjhammarstrom]

Thank you i will check that later
Must buy some new 280 grit stones to my Lisle hone and take of the glacé from the cylinders
I can only chose between 280 and 500 grit. 500is to fine
I checked the sleeves to the camshaft and they look pretty good.
Must make a better measure on them later.

[Cjhammarstrom]

I have one question.
If i put new sleeves to the camshaft, do i need to use a reamer to make the sleeves in line or something lika that?

[rickf]

You need a special bearing installation tool to put in cam bearings. Please do not take this wrong but if you do not know about the tool then you do not want to tackle the job. It is rather tricky getting the oil holes lined up perfectly when you cannot see them. The tool is also not cheap so it is not worth it for one job. Cam bearings are usually put in by the machine shop that is doing the machine work on the engine.

[rickf]

I just want to point out something one more time and after that I will be quiet about it. The honing that you want to do is a bad idea. To refinish the cylinders for a new set of rings you should use a ball hone, it will not take off much metal. The hone you are using is going to take off several thousands of metal. Your rings are going to rock in the pistons and eventually break the ring lands. It is your motor to do with what you want but you came here for advise so I am giving it. I will not mention it again.

[Cjhammarstrom]

Yes I know I will remove some material from the cylinder but if it's in the right measure it will be okay.
Yes the piston ring will break if the cylinder is to big, the pistons will also break.
This make me think about using a ball hone or the rigid Lisle hone
The thing with the ball hone is that the cylinder will be oval if it's already is.

Is there a picture to see on the sleeve install tool?

[Cjhammarstrom]

Last week i received this 0.10 over crank.
Its a different model but have the same id numbers.
I'm now waiting for the ball hone to be shipped from the states so i can hone the cylinders.
I hope the crank is not bent from the shipping.

[Cjhammarstrom]

I have a question about the camshaft bearings
If I put in new ones do I need to grind them or something?