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1989 Diesel Jimmy. What do we have here hmmmm

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blazinzuk said:
@80' 427

It literally kills me not to do some at least honing and new rings. I'm not even gonna pull my snap gauges outto measure the bore. I will get to point where I convince myself it has to be rebuilt.

But this is our second car. It has sucked being down to one car.

But I am gonna go pull my valve spring compressor out and lap the valves.

Another thing that kind of sucks up here no engine machine shop. Closest good one is 2 hours away
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Why are you rebuilding this engine?

I originally thought this was going to be a 1-day yank and swap affair. But the tearing apart keeps going and going... :dunno:


I hear ya on the machining shop. A couple of months ago I was looking for anyone who could magnaflux a leaky head...couldn't find one closer than an hour's drive. Decided it made more sense to simply buy a rebuild rather than spending 1/3rd of that cost just to verify that my head was blown. :doah:
 
I'm not rebuilding it.

It was greasy. Obviously leaking rear main some oil leaking near the front. Valve cover gaskets leaking and oil pan gasket leaking.

Everything else has been a desire to make it as reliable as possible.

I have done the swap thing way too many times and had a "good" engine have a come apart. Doing this you find things. Like the timing chain.

The balancer is missing a small chunk in the backside. Not sure I would have ever seen that.

If I threw this in and it broke the crank in 2 weeks what's the point.

Other than those things this engine looks pretty solid.

Hence the reason I'm not doing anything complicated or anything that could be deamed a rebuild. Regasket is as far as this could be called
 
I'd clean the valve seats up, new timing chain, balancer and call it a day. These engines run for a long time with little cracks in the heads. Long as you don't run it too hot coolant temp wise you'll be ok.
 
KirsL said:
I'd clean the valve seats up, new timing chain, balancer and call it a day. These engines run for a long time with little cracks in the heads. Long as you don't run it too hot coolant temp wise you'll be ok.
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Dats the plan. Should be back together soon.

Not gonna get much done this week though my wife has to take the test to be a licensed clinician. Kind of a big deal.

On the bright side as near as I can tell the block is not cracked. Or if it is you cannot visually tell
 
76zimmer said:
:burnout:
What's redline 3000?
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I'm pretty sure I can get past that, but I haven't tried very hard. These engines sound really neat at low speed, but they start losing awesomeness after 2000RPM and start to sound downright ugly past 2500 or so.

And it's worse yet with an intake howl. :doah:
 
campfire said:
I'm pretty sure I can get past that, but I haven't tried very hard. These engines sound really neat at low speed, but they start losing awesomeness after 2000RPM and start to sound downright ugly past 2500 or so.

And it's worse yet with an intake howl. :doah:
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Rich's blazer with glass packs sounds wicked awesome at about 2800-3k
 
At least in my 82 6.2 high-speed governor is 4250. I had my .31 plungered 6.5 injection pump set to this speed on the run stand.
 
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If the Crack is bad enough, you'll see it under good lighting.

3600 is stock governed redline.
Mine will go to either 4250 or 4500, I forget which. It's a screamer though.
 
blazinzuk said:
Oddly enough glass packs seem to be a good sound choice for mufflers.
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My Suburban has one glass pack on it (came that way :rolleyes:). I'm not a fan of glass packs, but the 6.2 does manage the make the glass pack sound good. It's not something that I would pay to "upgrade" to, but I haven't bothered changing it. With any other engine that glass pack would have been ripped off quite promptly.

jekquistk5 said:
Rich's blazer with glass packs sounds wicked awesome at about 2800-3k
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I don't have a tach on mine, so I hafta estimate the engine speed, but by that point the engine is howling. Doesn't sound terrible, but it's loud enough to not be fun standing outside it at a short range. Would probably sound pretty neat at da dunes. :thinking:
 
I must be old, I like the sound of extra long (28"-32"+) glass packs, mellow at low rpm bark at higher rpm but still not the stupid loud of the 12" ones. Very similar to chambered exhaust sound.
 
Didn't do anything today. Sick kids.

Anyway thought I would post pics of the cracks in the heads for further review





The cracks are on #7 and #8
 
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