I found out my problem is i have a cylinder down. Should i bore the whole motor? or just that one cylinder and sleeved it? any oopions will help. And oalso does any one know bnout how much it would to cost to do either???? Thanks lfor trying to help me solve my problems yall are the best!!!!!

 

"I have a cylinder down" So what exactly does that mean? I am going to guess that means down on compression. But why? Bent valves cause that, and it doesn't take much either. Bad valve guides, too. Before you start talking about punching out your block, you need to know EXACTLY what is wrong. You may only need some head work. If it is a scored wall, SOMETIMES a hone will clean it up and still maintain the ring clearances required.

For the amount it is going to cost to fit the sleeve into that one hole, may as well bore them all. Any good machine shop will tell you that sleev'ing a block is only practical for that ultra rare, low production number block.

Now, if you bore just one hole, the machinist is going to have to take a LARGE amount of weight off that piston to make it equal the other seven. Again, not a good idea.

Finally, why not look into a short block exchange (no heads) or a long block exchange (heads to oil pan)? Sometimes it cheaper and easier than the nickle and dime road that leads to the machine shop.

 

they said that the piston scared the walls. so they would have to bore it out and sleeve it. i have no idea i just want it fixed so i trying to find out what will have to be done. The Machanic told me it was caused by a bad injector. And its the compression.

 

How is too much fuel or two little fuel going to scar the cylinder wall? Did the injector puke its guts into the cylinder? I've lost the lower end of spark plugs and not hurt the hole.
Ask for proof of this claim. Get a second opinion. This isn't rocket science here, it's an internal combustion engine.

After you get a second opinion, get some prices, then price a short or long block replacement motor. Unless you have some grand plans for some hot rod 7.3L...

 

to much fuel can hurt top of pistion, expanding it and making it score the walls.

i just had 2 cyl sleeved on a 4 cyl kubota motor. cost 500 bucks. but they were small sleeves(3inch). i know as the sleeve gets bigger cost goes up.



also fyi every 7.3 IDI engine that jasper does they sleeve number 7 hole since thats the one that always cavitates. i know he doesnt have a IDI but alot more people sleeve then replace the block.

 

Have they checked to see how far they can go? You can get rebuild kits with .050 over pistons... Or you can have that one hole sleveed and match the others... Needs to be a complete rebuild or your just looking at problems down the road later!

 

We get engines all the time with one or two bad holes caused by a variety of different things. We always have the machinist check the tolerances of the remaining good holes and if they are within the tolerance for stock rings and pistons we hone those and sleeve the bad holes and have them bored to match the rest.

Not sure where you all get your machine work done but our cost for sleeve and labor is $75.00 per hole. Then I go to Ford and pickup one of their rebuild kits for $1100 and but it back together.

I think the last one we put together a couple weeks ago cost right around $1800 and that was for 3 sleeved holes and rest honed, polished crank, cam bearing R&R, complete head job with all new valves and Ford rebuild kit.

So in my opinion if you only have a couple bad holes that need to be sleeved then that is what I would do. Heck I know of one guy that had all 8 of his sleeved a few years back. I would not go that far as I have a few blocks laying around.

 

how much u want to sell a block for