Pistons for a rebuild

The_88_lariat · Aug 29, 2016

I have read everywhere not to bore the motor out but I don't have a choice unless anyone on here would like to donate there credit card to me I can't do sleeves I'm already spending over 2 grand on everything and need to get my truck running and get back to work mahle seller .020 all the way to .040 the truck was a fleet truck for all its life I have to do something it's either bore over slightly or have a TON of blow by its a lose lose situation

laserjock · Aug 29, 2016

I don't think anyone is trying to beat you up but what nobody wants to see is you put 2k in the motor and have it cavitate in a month. If you can't afford to sleeve it, maybe the best option would be to find a donor in better shape to start with. NA IDI motors can be had for around $500 or less in some places.

Just trying to present options.

The_88_lariat · Aug 29, 2016

I understand that you guys aren't trying to beat me up And that's not what I meant by that but the cavitation would have already preseted it's self by now with the cylinder wall wear being almost .020 over if it gets bored .020 over than it will just be re rounded at .020

Knuckledragger · Aug 29, 2016

laserjock is right, if you are not able to put up for sleeves, another block might be a cheaper answer. I do not believe there is any difference between turbo and N/A 7.3 blocks, everything is in the rotating mass.

Cavitaion is not a question of wear or time. It is physics. And it does not happen until it does. And it does not often give warning. Since the truck was a fleet truck it may have had very regular coolant changes, which is a very good thing to reduce the opportunity. We just see you rolling the dice in a potentially expensive gamble.

DaveBen · Aug 29, 2016

There is no known test for cavitation. Your guess is as good as the next guy's...

79jasper · Aug 29, 2016

DaveBen said:
There is no known test for cavitation. Your guess is as good as the next guy's...

Yes/no.
Cylinder wall thickness test can be performed. But that'll only tell you the area you're checking.

Sent from my SAMSUNG-SM-G935A using Tapatalk

yARIC008 · Aug 29, 2016

Most of us speak from experience. I rebult my engine, reinstalled, and had to take it all back out and sleeve it due to this. Trust me, if something is worth doing, its worth doing right. Drilling these cylinders out is not the right thing to do. You'll spend 2 grand and have no truck. At the VERY least, sleeve the last two cylinders towards the rear as those historically cavitate the quickest for whatever reason.

MTKirk · Aug 29, 2016

laserjock said:
I don't think anyone is trying to beat you up but what nobody wants to see is you put 2k in the motor and have it cavitate in a month. If you can't afford to sleeve it, maybe the best option would be to find a donor in better shape to start with. NA IDI motors can be had for around $500 or less in some places.

Just trying to present options.

THIS! Even without sleeves 2K most likely won't get your rebuild done, at least to any level of reliability. I spent over $1000 on the heads alone, probably around $4,000 total and did all the work myself (except machining) Find a running used engine with as much known history as you can, and you will be much better off.

laserjock · Aug 29, 2016

A promar reman is only $3200. It's sleeved on all 8 holes and comes with a warranty. Just for a data point.

david85 · Aug 30, 2016

I was in the hole for $2800 CAD when I did mine (bored 30 thou over). $800 was just for the two reman heads I had to buy since mine couldn't be rebuilt in the time I needed.

And I'll add another vote for NOT boring out a 7.3. It won't pay off to take risks on stuff like this. Not only will the cylinder be thinner, but it will also flex more, causing a more violent cavitation event from normal use. Its not just less metal to eat through - it will eat through faster.

Pistons for a rebuild

The_88_lariat

Full Access Member

laserjock

Almost there...

The_88_lariat

Full Access Member

Knuckledragger

blowing chunks and grabbing porcelain

DaveBen

Supporting Member

79jasper

Chickenhawk

yARIC008

Drives really slow

MTKirk

Full Access Member

laserjock

Almost there...

david85

Full Access Member

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