1989 Diesel Jimmy. What do we have here hmmmm

[KirsL]

I've seen waaay worse cracks on engine that still ran fine. Doesn't surprise me that those are on the rear most cylinders. Which see the coolant at its hottest. I know you can't afford a new waterpump but check the coolant passages for build up of anything that could limit flow.

You could also swap the sides the heads were installed. It would put the cracked ends at the front of the engine where it's coolest.

Cast iron can be tigged but it requires a bit of an involved process. Have to preheat, use a specific filler rod, postheat and have to watch how fast it cools. It's doable but a fair amount of work to.

 

[80' 427]

Most crack repair I have ever seen is high nickle smaw with long pre and post heats.

 

[campfire]

I've seen waaay worse cracks on engine that still ran fine. Doesn't surprise me that those are on the rear most cylinders. Which see the coolant at its hottest. I know you can't afford a new waterpump but check the coolant passages for build up of anything that could limit flow.

You could also swap the sides the heads were installed. It would put the cracked ends at the front of the engine where it's coolest.

This is a decent idea (be sure to switch the temp sensor over, it's easier on the bench). FWIW, when I ripped my 6.5 apart it was cracked between every pair of valves. I wouldn't hold it up as a wonderful engine (I ripped it apart because of milkshake in the oil pan), but my local head shop told me not to worry about them. They said that these heads often do that without causing issues.

 

[Deuling]

Tig cast iron?

I have no clue, nor was I backing that up with any real personal experience or opinion.

It just sounded fun to say.

 

[blazinzuk]

It's always fun to say.

I'm not super concerned with these as I have seen a couple good running 6.5s pulled apart and have more cracks.

 

[KirsL]

Most crack repair I have ever seen is high nickle smaw with long pre and post heats.

Stick welding cast is also common method to fix it. For cracks that small tig is much prefered. Pre and post heat cycles are the same for either process.

 

[82355]

That is how it goes...
Considering the state of ALL GM engines in the early/mid 1980's, I don't consider the 6.2 bad at all.

I didn't call the 6.2 a bad engine.

I said it would have been a better engine had Chevrolet not cheapened up multiple aspects of the engine.

Martin

 

[blazinzuk]

I didn't call the 6.2 a bad engine.

I said it would have been a better engine had Chevrolet not cheapened up multiple aspects of the engine.

Martin

Yep a couple of changes and the 6.2 would have been known for durability and good milage. But no matter. My other 6.5 is the 599 block which is supposed to be the best block. If I ever go full rebuild I'll use that one and buy the improved head.

Made slight progress. Head wasn't feeling to awesome today. Usually after a weekend like we had I'm down for a day or two. Hoping to get everything else cleaned and painted in the next couple days

 

[blazinzuk]

So does opening a box that parts came in count as progress?

If so I made progress tonight.

If not well.....well.........if not screw you guys I'm counting it as progressing.

 

[Deuling]

So does opening a box that parts came in count as progress?

If so I made progress tonight.

If not well.....well.........if not screw you guys I'm counting it as progressing.

I'll count it as progress if you post pics...

 

[76zimmer]

I'll count it as progress if you post pics...

cuz boxes!

 

[AgDieseler]

So does opening a box that parts came in count as progress?

Of course! Simply thinking about your project, building in your imagination, and cruising parts websites all count.

David

 

[jekquistk5]

So does opening a box that parts came in count as progress?

If so I made progress tonight.

If not well.....well.........if not screw you guys I'm counting it as progressing.

Sounds like someone is gonna get texted more pictures tonight..

 

[blazinzuk]

This box opening happened yesterday.



There shall be more progress ( box opening) tonight.

Unless my head starts feeling better. Not feeling like it will

 

[sreidmx]

wow amazing...

 

[blazinzuk]

I know I know.

My box opening skillz are the stuff of legend

There will be tales told and songs sung

 

[GWeakland620]

No effing way! Is that bubble wrap?!

 

[jekquistk5]

The box I opened yesterday came with a surprise. Doah

 

[blazinzuk]

No effing way! Is that bubble wrap?!

And it's all mine!!! Muwahahaha.

 

[GWeakland620]

Damn...