Bored, so I took apart my old 6.2

[SpareParts]

So ya, Nothing going on today so it was a perfect time to do this.
Here is my old engine. Removed at close to 240K Ran great but did have a piston slapping when cold.

Both valve covers are all gunked up.

The valley cover has probably never been off. The silicone gaskets were all hard and brittle.

All cylinders were burning good.

 

[SpareParts]

The rod bearings are not too bad, but it does look like the oil filter was bypassing for a while. This is #1 with all the rest looking better for sure.

Main bearings show the same pattern on the lower part and great on the upper half.

Pistons are exactly how i expected them to look. Coating worn off and scuffed. They all look very similar.

 

[j91z28d1]

cam bearing?

 

[SpareParts]

Cam bearings are trashed like you would expect.
#1 has a chunk flaked off
#2 the edge is flaking off and worn thin where the cam rides
#3 #4 #5 totally worn out but not the worst i have seen

 

[SpareParts]

The block is actually not too bad. Pistons pushed right out with little effort and i can still see most of the factory crosshatch in all cylinders.
I remember needing to use a ridge reamer to remove pistons on 100k engines way back. Newer low tension rings FTW!

 

[j91z28d1]

wow toast.

I don't remember if you had a tread but how was the oil pressure before?

 

[SpareParts]

When i first got Cracker the oil pressure was about 10psi hot idle and had a lot of glitter and chinks in the oil pan.
Put a high volume Melling pump and new O ring in it and hot idle oil pressure was 25ish psi.

 

[j91z28d1]

judging by the mains and rods looking pretty good would you guess the low pressure was all from the cam bearinga?

 

[B-train]

How's the timing chain and tensioner? Based on what I've seen, it must had had some extended OCI during its life. My 2008 is at 210k, with the obligatory piston slap when cold. Still runs like a champ, but its cool to see what a motor under similar life span looks like.

Thanks for the good info!

 

[Tonyrodz]

I also thought if the oil pressure played a part in that bearing wear, along with some of that oil starvation issue.
So what's the plan? Gonna rebuild it and keep it? Bigger cam during the rebuild?

 

[SpareParts]

For sure i believe bad cam bearings cause low oil pressure. Putting in a HV oil pump is a band-aid.
The timing chain was stretched for sure but how bad i don't know. The tensioner was near its limit.

Other than that one piston slapping when cold you would never know some of it was in such bad shape. It ran near perfect. When it was up to temp you could just barely hear the piston slapping under load.

 

[j91z28d1]

I vote drop in stroker kit.

 

[SpareParts]

I also thought if the oil pressure played a part in that bearing wear, along with some of that oil starvation issue.
So what's the plan? Gonna rebuild it and keep it? Bigger cam during the rebuild?

I'm an idiot, but the way i have always understood it is without good oil pressure there is not enough oil to keep whatever is rotating off the bearing surface.
I'm not really sure how i want to go with it.
If i rebuild it, it would just be a garage rebuild with no machine work, New pistons, Bearings, Cam, Lifters you know, all the standard stuff.
I could probably sell it for $800ish.
I do know i don't want it sitting in my small garage taking up room for years.

 

[SpareParts]

I vote drop in stroker kit.

If you're into donating funds, I would be willing to get a little obnoxious with it!

 

[j91z28d1]

I'm an idiot, but the way i have always understood it is without good oil pressure there is not enough oil to keep whatever is rotating off the bearing surface.
I'm not really sure how i want to go with it.
If i rebuild it, it would just be a garage rebuild with no machine work, New pistons, Bearings, Cam, Lifters you know, all the standard stuff.
I could probably sell it for $800ish.
I do know i don't want it sitting in my small garage taking up room for years.

800$ for a 6.2?

man, from what I've seen a bare block is worth more than that. a high mileage junkyard one going for 2k last I looked. it's basically an ls3. which is one of the most popularity ls swap engines. I think you can sell it as is for 800. atleast in south TX fb

 

[strutaeng]

Slap it back together and list it for $1800. Lol.

So did you get another engine for your truck? They didn't ask for a core?

6.2 aluminum engines (I'm assuming it's Al block?) command high prices. That would make a good core for some guy for Miata drift car or whatever. They are always after the aluminum blocks for lighter vehicles.

What did the crankshaft journals and cylinders bores look like? It's probably fine with a DIY-rebuild by the hone garage enthusiast

 

[SpareParts]

It is the old engine out of my Yukon.
The wrecking yard i got the current engine from wanted the core, so was a $800 core charge and had 6 months to bring it back.
Took me 8 months to change the engine because lazy so i could not return the core. I did not really care, having a rebuildable 6.2 is never bad.
Funds have already determined it is a prime candidate for a garage rebuild.

 

[donjetman]

The rod bearings are not too bad, but it does look like the oil filter was bypassing for a while. This is #1 with all the rest looking better for sure.

View attachment 471743

Main bearings show the same pattern on the lower part and great on the upper half.
View attachment 471744View attachment 471745

Pistons are exactly how i expected them to look. Coating worn off and scuffed. They all look very similar.
View attachment 471746View attachment 471747

what a mess

 

[SpareParts]

I would imagine all of the higher milage 6.2 look about the same.

 

[Joseph Garcia]

If that motor is a 2007 L92 6.2, it definitely has value in the racing world.