91 V2500 Suburban restoration project and r

[David1062]

I have had 5, 6.2 Suburbans. I bought this 91 over 17yrs ago from original owner. I think I have learned a little about 6.2's over the years. About 5 yrs ago I decided to restore my V2500 burban and began by rebuilding engine and replacing radiator and tranny also . (I have a diesel Excursion....but have not found anything like the old Suburban.) Basically everything recomended on this site was done to engine with rebuild. Then it sat ~ 4yrs in my garage. (It has 4l80e tranny) I have had a nagging fuel/air leak around the fuel filter base. I replaced heater o'rings and the drain plugs. But the problem continued ...although better. I have had a minor valve cover leak since the rebuild so three months ago I decided to remove entire fuel injection system to access valve covers and replace ALL fuel lines and put a new fuel filter base and filter in place of the old Stanadyne. I finished the project today with valve covers repainted, gaskets replaced, rubber lines all new, and a new screw-on 6micron filter and base. I left the lines loose at the injectors and spun engine over for 15 seconds, 4 different times. I then tightened the lines, spun it for about 10 seconds.....and it cranked!. After smoking for about a minute, it ran perfectly. It cranks instantly and runs perfectly. So now to finish the paint.

[Edahall]

Good job on fixing that Suburban up. Are you painting it yourself or having it done professionally. Also, is the clear coat all chalky and peeling? If so, you should sand it all down to metal because the new paint won't stick for very long unless that is done. I had the same issue on my 1990 so I bit the bullet and sanded all the old paint off and started from scratch.

Here's some pictures.

http://img.photobucket.com/albums/v136/Ventura/P1020931.jpg

http://img.photobucket.com/albums/v48/rhedahl/P1030005.jpg

https://lh6.googleusercontent.com/-C347PZlxgNo/UEfxjhzwgPI/AAAAAAAAAB8/Z2ZdKmI1hy8/s1024/P1030063.JPG?gl=US

[mrwilecoyote]

Nice !!

[Renntag]

Nice truck.

What did you do to get that fuel mileage?

[Edahall]

Nice truck.

What did you do to get that fuel mileage?

Low rpm's and keep the speeds down. At 60 mph, this engine turns over at around 1300 rpm's.

I'm also running a set of P metric 265/70/17 tires. They're great for long distance highway driving and wear like iron.

Keep the vehicle clean. Sun visors, roof racks, fender flares, running boards, lift kits, etc. lower fuel economy.

[Robyn]

Absolutely sweeeeeeeeeeeeeeeeeeet

The 91 w/6.2 was the pinnacle of the Suburban. IMHO :)

Luxury, function, dependability, durability, it had it all, without the pitfall of the added electronics and failure prone equipment of the later Burb Diesels.

My only thing is, I prefer the TH 400 TO THE 4L80 for these trucks.

A 2500 Burb 4x4 with a 6.2 and a TH400 could easily knock down 22-25 mpg hwy and this was with stock size rubber and 4.10 gears.

Had an 86 that would do 26 mpg if ya kept your boot off it.


Wonderful rig, Thanks for sharing

Missy

[DmaxMaverick]

......
A 2500 burb 4x4 with a 6.2 and a th400 could easily knock down 22-25 mpg hwy and this was with stock size rubber and 4.10 gears
......

= Ear plugs !!

[Robyn]

Not even.

That truck was bone stock from the factory.

The truck had approx 60k miles on it when we got it from a local dentist that bought a new one

Interior noise levels were very quiet.

That was a common spec on the HD 2500 4x4 with 6.2 of that time period.

This was a normal setup with the HD, tow package.

Even our 95 Sub with 6.5 had the 4.10 gears, albeit it had the 4L80 gearbox with the OD

The 1500 4x4 was a far different story, IIRC the 700R4 was coupled up and backed by 3.42 gears.

I have had K5 Blazer with 6.2 and 3.42 gears, yeah the run at lower RPM, but are totally gutless, especially if you tire the little beast up some.

The 6.2 was pretty forgiving in the gearing department, and would produce great MPG numbers even with the low butt gears.

IMHO, the 6.2 with the TH 400 was about as close to bomb proof as you could get.
Great mileage, and good long life.
The 86 I spoke of ran 260K while we had it, and it went on to serve the next owner into the mid 300k range before the gearbox finally went away.

I don't know the circumstances of it's demise, but at 300k who really cares.

The ATF had been fresh at 60k when we got the rig, and then about 200k I dropped the pan, swapped the filter and refilled it.

The only reason then was it was leaking on the drive and making a mess.

Great stuff

Simple, easy to use, dependable.

Missy