my $800 special [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: my $800 special


stahlecker
01-08-2009, 04:27 PM
Well a few months ago I bought an 82 half ton 4x4 with a 6.2 for 800 bucks. The 700r4 was replaced for a turbo 350, I believe. The old girl has a bit of a cancer issue but its mostly still there. The interior is in pretty good shape, no tears in the seat. I figured it would have a few issues and I was right.

The first thing was that it leaked antifreeze. Ended up being a water pump. While I was there I put on new water hoses and v-belts.

Shortly after that it died on me. Went to my first rule of improper running diesel engines, and rerplaced the filters runs like a champ.

The first snow hit and after the first day of driving around with the hubs locked in it developed a heck of a front end clunk. The cv joint on the front driveshaft was shot. Scrounged a front driveshaft from an 87 with 50k miles. The splines were bad on it, but they were good on mine. A little cutting welding and 2 bad driveshafts became one good one. Also replaced the drivers side u-joint in the axel and packed the wheel bearing.

I yanked the gauges out and cleaned all the dash light connections so they all work. Slapped my CB in and also a new stereo.

Now to my current problem, a random diesel leak. I know I need to crawl under and start looking. I've heard the rubber hoses could be the issue but I was wondering if there are some other possible common leaks. I haven't seen the leak a buddy of mine has been driving it around the past week and he said the leak is not from the tanks. It is around the engine.

Sorry it's long, I'll post cliff notes a little later.

Thanks, Brian

BlueBurby1
01-08-2009, 04:33 PM
if it is around the engine, with the vehicle running, look at the injectors and see if there is fuel dripping from the rubber lines or the injector metal lines...i had 2 leaks on my old burb, one was a bad rubber line, replaced the single line and away she went...then the next time she leaked she actually had a cracked injector...crazy i know...but oh well, it happens. replaced the single injector and again away i went...hope that helps some.

schwinn68
01-08-2009, 04:51 PM
sounds like a great truck to me. Only thing better is if it would have come with a snowplow too.

zetan
01-08-2009, 05:26 PM
Could also be leaking from a hose in the valley between square fuel filter mount and IP which runs under the air intake...

stahlecker
01-08-2009, 06:45 PM
I thought of checking around the filter. This truck has the round filter.

My buddy had pulled it into the shop to fix the tranny gear indicator, which I had messed up when I got overly persuasive putting the dash back on. He said when he backed the truck out of the shop he noticed about a quart of diesel, he figgured, all over the floor. He said he looked around the lift pump and the tanks and he couldn't see a leak anywhere.

SICNICK
01-08-2009, 07:43 PM
Does it start hard? Does it smoke at all while cranking before it fires up?

Answering these questions will help narow down a source.

Otherwise 6.2 return lines are notorious for leaks, my most recent leak was the end "cap" on the closest to the driver seat injector. I was 500 miles from home and a small vacuum cap did the job just fine.

High Sierra 2500
01-08-2009, 10:16 PM
There's basically three places they leak without having driveability issues - Return lines on the injectors, lift pump itself, and the lines to the filter/filter itself.

The high pressure lines to the injectors can leak, but if one of those leaks it usually causes a misfire.

The suction lines before the lift pump can leak too, but typically create all kinds of starting/stalling/driveability issues.

tigman
01-08-2009, 10:38 PM
Hi brian if you look near the IP on the driver side or in the back of the engine in the valley in most cases of leaking it can come by the advance mecanism. on the IP . you will see oil trace in the area . in case of doubdt clean it area with degreaser where you see the fresh wet trace you find the leak .

if it leak by the IP advance piston , no big deal , for now ,:rolleyes:

ed

stahlecker
01-09-2009, 08:29 AM
The truck starts really good. Heck, it even started witout being plugged in for a weekend with temps hovering around the zero mark.

I'll get back home tomarow and start checking things out.

Thanks for the help so far guys.

Brian