Anti Freeze PH level, pitting thru cylinders?

[uglytruk]

I just came from the machine shop that's gonna re-build a 6.5 for my '87 'Burb. He had a John Deere industrial engine. The cylinder liners were pitted right thru! The high compression causes a chemical reaction that eats right thru the heavy, good quality steel. Pix to follow.
Truckers check the PH level of the coolant to minimize this effect. What should I look for on the 6.2-6.5?
Anybody ever see this phoenomina on a "fixed sleeve" block?

 

[imiceman44]

I just came from the machine shop that's gonna re-build a 6.5 for my '87 'Burb. He had a John Deere industrial engine. The cylinder liners were pitted right thru! The high compression causes a chemical reaction that eats right thru the heavy, good quality steel. Pix to follow.
Truckers check the PH level of the coolant to minimize this effect. What should I look for on the 6.2-6.5?
Anybody ever see this phoenomina on a "fixed sleeve" block?

I don't think we have sleeves, it's all cast and machined.
I have never seen this go thru our blocks but I use the havoline GM (orange) fluid, it has no problems, and it's recomended for 5 year intervals.

 

[uglytruk]

I usually get "used" antifr from the local shop. too many vehicles to buy new... nice, huh?

 

[imiceman44]

I usually get "used" antifr from the local shop. too many vehicles to buy new... nice, huh?

Well you are supposed to change it because the PH level gets too corrosive.
So you are making sure it's corrosive before you put it in your truck?
It's not that expensive to put it once every five years.
I buy it at your favorite place: Walmart

 

[uglytruk]

YOU know why I do it! I've got a dozen or so vehicles on the road... It really got going when I bought a Detroit Diesel from SF with no antifreeze, just rusty water. Didn't have $30 or so $$$, and it was already well below freezing, and I justified by not wantin to put fresh AF in a rusty block. So free slime at the local tire shop..... Let it sit 6 months, and the silt settles out... but at least I should check the PH... already have enough rust holes...

 

[uglytruk]

Here's the cylinder from a John Deere tractor. Let this be a lesson to those not changing their A F!