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Old 10-09-2004, 10:33 AM   #1
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any GM 6.5 turbo diesel folks out there?

hey all,

need to find some info on GM 6.5 diesels.

in particular, i'm trying to diagnose a BIG fuel leak on the passenger side rear of the engine. the engine valley is dry, so i believe it is not the pump, thank heavens!

john
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Old 10-09-2004, 01:01 PM   #2
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John, check out: The Diesel Place or The Diesel Page . Lots of experts there.
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Old 10-09-2004, 04:26 PM   #3
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John

I used to have a 6.5 surburban before I got the Avalanche. Rear on passenger side sounds in the vacinity of the fuel filter - are you sure the filter is seated correctly?

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Old 10-09-2004, 04:43 PM   #4
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good idea ken.

unfortunately after putting it up on ramps i got a better look at it, leak definately coming from injector pump.

thinking it is either a loose fitting on the return line or a leaky fuel shutoff solinoid. will know more after manifold is off. it runs fine.

it may be under warranty, i'm gonna call around on monday and either let the dealer fix it, or tear into it myself depending on the outcome of the call......

john
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Old 10-09-2004, 05:16 PM   #5
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Good luck - mine drove me crazy after I put in a filter once. I must have had that filter in and out a jillion times and could not get it to stop leaking - so sent if off to the dealer and evidentally, the ring from the old filter had fallen off to the bottom of the cup and would not allow the new filter to seat properly - man that drove me crazy, then was embarrased that I didn't find that ring. Live and learn.

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Old 10-09-2004, 07:55 PM   #6
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Originally Posted by john hd
good idea ken.

unfortunately after putting it up on ramps i got a better look at it, leak definately coming from injector pump.

thinking it is either a loose fitting on the return line or a leaky fuel shutoff solinoid. will know more after manifold is off. it runs fine.

it may be under warranty, i'm gonna call around on monday and either let the dealer fix it, or tear into it myself depending on the outcome of the call......

john
John, leaking injector pumps became a problem after federally-mandated sulphur content rules. It seems some other important stuff had to be left out of the mix also. So,... There is a seal that will sometimes go bad on these, because of the different fuel formula. A rebuilt pump will have an updated seal that will work with the new fuel.
Good luck with it!
Terry
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Old 10-11-2004, 09:07 PM   #7
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big stinky is all better!

line to the injector pump was bad, zero cost, all better now!

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Old 10-11-2004, 09:25 PM   #8
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line to the injector pump was bad, zero cost, all better now!

john
Chalk one up for the good guys.
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Old 10-11-2004, 09:53 PM   #9
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terry

if i could hook both silverados up multiple unit style like the railroad i'd have a 500 horse tow vehicle!

ha ha!

john
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Old 10-26-2004, 06:53 PM   #10
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mr. plow

update:

i used "big stinky" to tow the excella up to rickstream's place for the winter, it preformed flawlessly.

sure miss the extra horsepower that my 6.0 has for climbing hills, pretty decent tow vehicle all in all...

now big stinky is ready to start it's second life as a plow truck!

clank clank clank!

john
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