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Leaking diesel tank
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Author
Posted 5/30/2007 1:18 PM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
Leaking diesel tank

Pulled my tank today and I think I know what caused my leak (flood rather...)

This is what 20 years of salty snow slush does to thin sheet metal. I've found 60 years old battle field relics in better shape...




(rust.jpg)



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#76374
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Author
Posted 5/30/2007 1:25 PM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
RE: Leaking diesel tank

Just for reference; 60 years old battle field relic. Found in a bog in Russia (Kinderheimhöe). It's not leaking...

Edited by Tjærand 5/30/2007 1:26 PM




(reference.jpg)



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#76375 - in reply to #76374
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Author
Posted 5/30/2007 4:45 PM
TWODOGS
Extreme Veteran




Date registered: Apr 2006
Location: UK
Vehicle(s): Norwegian Army 240GD
Posts: 584
500
RE: Leaking diesel tank

there looks a lot more steel on the helmet
The G tank is a weak spot , I have repaired two and there getting harder to find .
Twodogs
#76407 - in reply to #76374
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Author
Posted 5/30/2007 5:16 PM
roughneck
Expert




Date registered: Apr 2006
Location: UK, Germany & USA
Vehicle(s): 270 cdi.300 GD 300 GE.lwb 300 GE.swb. Disco 2
Posts: 4398
2000
RE: Leaking diesel tank

The panzer plate does not help, it traps mud and moisture. Plastic would be the way to go, or a cheap method is a tank recon, a lot of rad repair people do that here, must be the same over there.
#76417 - in reply to #76374
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Author
Posted 5/30/2007 5:17 PM
Ed Mclass
Expert




Date registered: Apr 2006
Location: Nashville, Tennessee
Vehicle(s): 1958 180a, 2010 GLK, 2000 G 500, 2005 SLK 350
Posts: 1215
1000
Re: Leaking diesel tank

I had to patch my old 280 GE tank and yet still had problems.
#76418 - in reply to #76374
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Author
Posted 5/31/2007 1:28 AM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
RE: Leaking diesel tank

I installed the upgrade plastic tank. I have a few steel tanks available, but all are old and have rust spots so that would only buy me some time. And the tank swap job is a messy one I dont want to do too often. And now I've got 90 litres ++ and that makes a huge difference in range.
#76552 - in reply to #76374
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Author
Posted 5/31/2007 2:21 AM
Fernando BR



Date registered: Jan 2007
Location: Brasil
Vehicle(s): G500/05 300GE/91 300GD/80
1000
RE: Leaking diesel tank

Tajaerand ,

IS you engine a OM 603 963 (OM 603A)?

If yes can you post a pic?

regards

Edited by boewick 5/31/2007 2:23 AM
#76561 - in reply to #76552
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Author
Posted 5/31/2007 3:02 AM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
RE: Leaking diesel tank

No, it's a OM617 with a turbo kit installed. (STT made turbos engeneered for the OM617). There are a few on the Norwegian forum with the inline 6 diesel, I'll see if I can have any of them post a pic here.
#76564 - in reply to #76374
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Author
Posted 5/31/2007 8:19 AM
amzimmy
Elite Veteran




Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
500
RE: Leaking diesel tank

On my G I have lined the exterior of the diesel tank with bituminous paint and fitted a stainless steel plate with some silicone strips to separate the two metals. Has worked very well and has given no signs of deterioration in the last past 11 years. However, I must admit, we do not have the need of "salt" on our roads in winter!

amzimmy



(DSC01674.JPG)



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#76599 - in reply to #76564
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Author
Posted 5/31/2007 12:48 PM
martin
Veteran




Date registered: Apr 2006
Location: Del Mar, CA Isles of Scilly, UK
Vehicle(s): 99 G500 95 E300D 95 R1100GS 06 K1200R
Posts: 297
100
RE: Leaking diesel tank

[hijack on]

amzimmy,

What is mounted next to your tow hitch?

-Martin



(amzimmy.jpg)



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#76609 - in reply to #76374
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Posted 5/31/2007 12:56 PM
amzimmy
Elite Veteran




Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
500
RE: Leaking diesel tank

Martin, funny that you ask ......... well since we have strict laws about liquor in Africa, this a tap where I store my "Single Malt Whisky" .........only kidding!

I have installed a 100lt water tank at the base of the loading zone and that is the tap/cock. In the photo you see the arrangement between a Water (100 lt) and a Diesel (100 lt).

Ciao, amzimmy



(double tank (700 x 525).jpg)



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#76610 - in reply to #76609
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Posted 5/31/2007 3:32 PM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
RE: Leaking diesel tank

I gave my old rusty tank a good rubbing with the steel brush angle grinder today and found a few big holes, about 3mm. I've noticed I've had a lot of air in my pre-filter recently and have probably been sucking air through the holes. I've noticed it dripped significantly more with the engine off...

Anyhows, the missus was the first person to drive our G on the highway and she asked me if the workshop did anything to the engine as well. The engine has a lot less injector knocking and high speed acceleration has improved drastically! I assume the air sucked in through the rust holes must have affected the injector spray pattern somehow.
#76634 - in reply to #76374
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Posted 5/31/2007 3:51 PM
amzimmy
Elite Veteran




Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
500
RE: Leaking diesel tank

Tjærand - 5/30/2007 9:32 PM

I gave my old rusty tank a good rubbing with the steel brush angle grinder today and found a few big holes, about 3mm. I've noticed I've had a lot of air in my pre-filter recently and have probably been sucking air through the holes. I've noticed it dripped significantly more with the engine off...

Anyhows, the missus was the first person to drive our G on the highway and she asked me if the workshop did anything to the engine as well. The engine has a lot less injector knocking and high speed acceleration has improved drastically! I assume the air sucked in through the rust holes must have affected the injector spray pattern somehow.


Tjærand, big lesson to be learned here, especially with diesel, remove your tank once a year, have it cleaned inside out, check for rust or knocks and repair.............end lesson,....... have your missus check the vehicle for "performance"!

amzimmy
#76636 - in reply to #76634
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Posted 6/1/2007 12:29 AM
Jonathan Joseph
Expert




Date registered: Oct 2006
Location: Charleston, South Carolina
Vehicle(s): 2004 G55
Posts: 1538
1000
RE: Leaking diesel tank

Tjaerand,
It could be all the rust you were sucking in along with the air causing you some problems. Injectors don't like little rusty bits much...

Jonathan
#76721 - in reply to #76374
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Posted 6/1/2007 1:07 AM
Tjærand
Extreme Veteran




Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
300
RE: Leaking diesel tank

I dont think it was sucking rust because the tank is clean and rust free on the inside. Of course, the pinpoint holes could have sucked in small amounts of it but dont think there was enough debris available to constantly obstruct the stream.
#76724 - in reply to #76374
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