Leaking Fuel ! ! !

[M123KT-450]

I can't really tell where it is leaking exactly, but its leaking from the fuel tank area running down the lines, and its leaking up by the engine around the oil pan its soaked in fuel as well . . .

From the top of the engine looking down it appears to be dry . . . Runs good just leaking fuel other wise runs as normal !

Any ideas ?

EDIT:
Could it be a returnish type system leak ? as it ain't effecting the truck's performance ?


Mike

[ZiGBlazer]

Very common leak around the back of the engine is the fuel heater o-ring. Can't help you much about by the tank, there is a return line that could be rusted out.

[M123KT-450]

Alrighty ill give the fuel heater a looking at . . . I've had past issues with it shorting out why not be a leaker to ?


Mike

[tonyyy_11111]

wouldnt it more likely be the connections on the take sending unit to the supply . return lines .. or the sending unit itself rotted .. oh and the lines are dealer item i think so .. dont drop the tank on a sat afternoon .. ahaha

you might be able to get a peek with a good light through the frame and body

[M123KT-450]

:mad: If i replace the O-ring at the fuel heater end i may just let the other end leak :o

I'm not happy about repairing this truck again seems like all i do is fix it just to fix it again :mad:

Mike

[tonyyy_11111]

well if you fix the front one sooner or later the back one will bite ya .. fix it before winter

[M123KT-450]

Well I'm done with, truck is just going to be hisled back out to the farm and dumped in the weeds...

I have a nice running Jeep Comanche I bought when the 6.5ers transmission failed last fall, I think I'm going to continue driving the jeep and look for a replacement truck for a tow rig.

Mike

[3bals]

It's 15 year old truck with 140K on it, what do you expect? Parts get old, parts wear out. It's gonna need maintenance. :confused:

[M123KT-450]

So it breaking down a few times a month then is normal ?

I have a 1953 Studebaker 2.5ton 6x6 that's 57years old has 127K miles had it 3 years only issue I had was a leaky fuel tank.

I have a 1962 GMC 1.25ton its 48years has lord knows how many miles I replaced 1starter 1 generator and a 1regulator in 13years.

I have a 1969 AMC AMX its 41 years old 75K miles had it 14 years haven't had to fix it yet.

I have a 1977 Ford F350 its 33 years old with 230K miles had it 10 years Replaced 1starter and 2 alternators.

I have a 1988 jeep Comanche its 22years old has 193K miles on its been repaired once needed an alternator.

But its normal for a 95' 2500 diesel with 140K miles to be repaired monthly ?

The "they Really don't make them like they used to" must really be true then ?

Mike

[grancito]

It's normal for a later model to have more problems because they are made from crap materials, in the end the new vehicles will be like disposable cigarette lighters.

[M123KT-450]

The list of repairs to the 6.5 is enormous and i have only had it a touch over 2 years . . .

3-5 starters i lost count . . .

2 alternators.

3 PMD's.

1 lift pump.

1 fuel heater.

1 glow plug power supply.

All new Glow plug system wiring harness.

2 batteries.

2 shift solenoids.

2 speed sensors.

1 thermostat but it 3 gaskets later still leaks.

1 Trans cooler.

Ya its a real dreamy truck :rolleyes: i got stuff 2 -4 times its age and mileage i have drive daily and routinely longer on way way less repairs . . .

must be a good Valid reason the 6.5 diesel was made Obsolete so fast ;)

ya know GM loves to run an engine for a few decades :cool: so for the 6.5 to only lasted 93'-20?? 01 ? 2 ? 00 ? they knew it was Joke and a disgrace to the true "turbo Diesels" of the world . . .

Rant off . . .

Mike

[grancito]

The 6.5 is basicly the 6.2 that started in 1982 and I haven't had to repair my 6.2 yet. All your problems are the tack on pieces, not the basic engine, blame AC Delco, and who ever made the other parts that have failed.

[M123KT-450]

:o ya this is true from the oil pan to the valve cover and the fly wheel to the dampener hasn't had any issues :o

:mad: About about everything bolted to it has :(


Mike

[trukdoc]

...told myself I wouldn't respond but oh well,if you can afford all the toys,then the truk shouldn't be a problem...that 6.5t that you love to slam was the cats a** from the time it came out till gm stuck their collective heads up their collective a**es...first gen elec.pump WAS a piece of crap..pump problem fixxed by 95..cooling problem cured by late 95-early 96..big improvements in 97 oiler block,h.o.waterpump...if you want NEW truk reliability drop 50g's for a new truk{show me your precious d*max in 18yrs}you constantly tinker with all your old stuff, a little here a little there...if you deny that you're a liar...I have old stuff and it's a constant battle to keep it all legal and running down here in the texas heat... what I and others on here don't do is constantly bitch and whine cause we had to replace a starter or battery...yea I just started a thread with a whine,but I'm not blaming my beast cause she needs an engine overhaul after @300,000 faithful miles...I'm just lamenting the cost...what I'm NOT doing is badmouthing what is still a pretty good engine...sorry about the length...jd

[M123KT-450]

What do you call tinkering ?

Cause I have done plenty of:
Tune ups.
Oil changes.
Brake jobs.
Light bulbs.
Tires.

Now if by tinkering you mean:
Doors fenders hoods beds radios and alike then sure I have done some tinkering . . .

Non of which prevented the vehicles from driving or being lawfully usable apon the highways to my knowledge if they ain't legal i haven't been stopped i most just trun the key and drive until it doesn't start run and or drive or stop then fix some time its just maintenance such tune up filters or brakes or tires some time its a repair start, alternator ect . . .

What the old stuff don't do is break all the time, I maintain them 1-3 times a year and repair them once every few years . . . NOT every other time they are driven such as the K2500 has done . . .

Miles to repair ratio of the K2500 V.s. anything else i currently own not even close to comparable . . . this is why they are still around when they start having major issues or breaking down back to back they'll be delt with . . .

I have had other vehicles like this K2500 in the past they eventually met there fate as will this truck . . .

NO i do NOT need to spent $50,000 to get new truck reliability . . .

I bought a 1962 GMC 1-1/4 ton from a township auction for $600 and i drove it a routinely every where i went to work to school to get food ect and so on for 6 year's i didn't so much as replace a light bulb . . . then i started only driving it during the summer i still got another 2 trouble free years before i had to do my first Repair on it . . .6 + 2 = 8 years first repair drove it 2 more year second repair drove it 3 more years repaired it once more . . .

$600 V.S. $50,000 i don't thik i did so bad there

Mike

[grvrjr]

I had the same issue on my 6.5L a few years back. I changed the bottom part of my fuel filter housing. it had a bad leak. every were i went it smelled like diesel fuel.

[M123KT-450]

I had the same issue on my 6.5L a few years back. I changed the bottom part of my fuel filter housing. it had a bad leak. every were i went it smelled like diesel fuel.

I'll look into that, if the truck can be repaired for $50-$150 i'll fix it again if its going to cost more the $150 then sorry but i'm done with it . . .

The Jeep has been a much better truck and it only cost me $300 :D

Mike

[grvrjr]

You sure you havent been buying refurbished parts. Ive had my 6.5l since 95 brand new first owner only changed the starter once(replaced with new starter. Never replaced alt. yet. changed a/c comprissor once. pmd twice. its now 2010 thats 16yrs of service with limited issues. thats why I hooked up my 1500 the way I did becuase its such a low maint. engine. If you think about it all you have to do is keep oil changed with fuel filter and cdr valve. relocate pmd. Stay on top of any check engine light issues and your good.

[M123KT-450]

Not sure I just always bought the cheapest unit the parts house has in stock.

I went through 3 new starters and 2 used well the second used one is on it now, I have to say the 2 used units lasted the longest so far . . .
The 2 alternators cost me slightly more then the little jeep pickup truck I bought . . .

I more then likely have more money invested into the 6.5 then my whole current fleet cost to purchase ...
So even the cheapest parts in stock still cost a great deal of money . . .

Maybe Diesels aren't for me ? I have great luck with Carburated and Throttle body injected gas engines . . .


Mike

[M123KT-450]

Ok so check the line to the injectors for tightness then pull out the fuel heater and inspect that for leakage ?



Mike

[grancito]

And check the rubber return lines linking the injectors, they don't last forever.

[M123KT-450]

And check the rubber return lines linking the injectors, they don't last forever.

Ya, :cool: I may as well fix this thing until major component failure happens ;)

Mike

[M123KT-450]

#5 injector return line was rotten I cut it shorter reconnected it engine side fuel leak stopped, so ill be replacing all the return lines.

Fuel tank still pissing fuel tho, may have to drop the tank !


Mike