80 seris fuel tanks size + use

Submitted: Saturday, Mar 05, 2005 at 22:51
ThreadID: 20988 Views:2147 Replies:5 FollowUps:4
This Thread has been Archived
Hi all
i have recently bought a 1991 80 seris wagon and would like to know the size of the main and sub tank?
also what is the best way to run these as it seems the return diesle goes to the main tank regardless of which tank you are using, so do you have to empty the main then the sub tank then whats been put in the main by the returning fuel????
if this how it is std has anyone got any better systems?
and finaly the gauge on the sub tank seems faulty, is there any tricks?
i am sure there is plenty of info out there on this.
Back Expand Un-Read 0 Moderator

Reply By: Member - Captain (WA) - Saturday, Mar 05, 2005 at 23:19

Saturday, Mar 05, 2005 at 23:19
Hi Dingo,

My 1990 1HZ standard 80 series had a 90 litre main and 55 litre sub tank. I know this from running them dry at different times (not by plan!!!). On later models they were listed as 95 mains and 50 sub for various models.

As for the sub returning to the main, it sounds like one of your solenoids is not working. On the early diesel 80 series, the tanks are totally independent ie. if operating from main, then returns to main, if from sub, then returns to sub. Not sure about later models, but I know there were changes at some stage. My BIL's 1996 4.5 petrol 80 series pumps from the sub to the main and has a 95/50 litre tank.

Cheers

Captain
Its not what you drive, but how you drive it!
LC 200 + AOR Quantum

Member
My Profile  My Blog  My Position  Send Message
Classifieds: AGM battery 120 a.hr (2 available)

AnswerID: 101275

Reply By: TurboCruise - Sunday, Mar 06, 2005 at 01:22

Sunday, Mar 06, 2005 at 01:22
Dingo,

I own a 1991 80 Series Turbo Diesel. The main tank holds 95L and the sub tank 50L. Both tanks are independant of each other. i.e. Operate the main return to the main etc. Sounds like your solanoid may be faulty.

As for the faulty gauge, never had a problem with mine. What exactly is the fault with it?

TurboCruise
AnswerID: 101282

Follow Up By: DINGO - Sunday, Mar 06, 2005 at 10:10

Sunday, Mar 06, 2005 at 10:10
Hi TurboCruise,
The sub tank gauge shows below empty after having done only say 250 on this tank, but i am just thinking now if sub tank only 50lt (mine not turbo unfortunatly) and its pumping its return fuel into main then perhaps gauge is correct??? i will look to fix the return fuel issue 1st then see how gauge works!, cant recall how much fuel sub tank took on the 1 trip we did as i did not fill it! i have an old 60 seris and its 2nd tank is 100lt so this might be putting me off trake a bit as i thought the 80 seris would have been as least 75 lt!
0
FollowupID: 359264

Reply By: steve21 - Sunday, Mar 06, 2005 at 07:48

Sunday, Mar 06, 2005 at 07:48
Hi,

depends where you fill up i believe, i have a petrol, i have put 64ltr in the sub tank.
i reckon since petrol discounting wollies / coles these pumps are much less accurate. Now i only use certian pumps. my 2 bobs worth.

steve
AnswerID: 101287

Follow Up By: Member - DOZER- Sunday, Mar 06, 2005 at 19:19

Sunday, Mar 06, 2005 at 19:19
Steve
The system is dessigned to fill the main when selected to main, but fill both when selected to aux...dont ask why, i dont know, but it is the case.
Andrew
ps you wouldnt run out of aux if it was empty and pumping back to main because main will overflow back to aux if there is enough diesel in it., otherise u will run out.....common fault is crud in the solenoid, take off the hoses, and blow through the solenoid to dislodge the rubbish...it will be the smaller return solenoid that is at fault.
A
b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)

Member
My Profile  My Position  Send Message
Classifieds: Bt50/Ranger Speedy grande2 18x8 alloys (x4), Landcruiser 200 series/100 series 4 alloy rims with tyres and nuts GC

0
FollowupID: 359288

Reply By: Bob Y. - Qld - Sunday, Mar 06, 2005 at 10:38

Sunday, Mar 06, 2005 at 10:38
Dingo,

Have owned a '90 model, and now have a '97 model. Always thought the tank sizes were 90/50. Have replaced the rear tank with a Long Ranger tank at 166L, which gives good range!

Believe Captain is right, the return solenoid is u/s. They are not cheap, but will stop the fuel going to the main tank only. 250 km out of that tank, with no bypass fuel returning, is not too bad. Think we only got 320-380 clicks with everything working. Think the new solenoid will "fix" the gauge.

In case you aren't aware, the diesels use the fuel to cool, and lubricate the injector pump. If you regularly run the tanks dry, in an attempt to gain more range, you risk wearing out the pump. Big repair bill!

Hooroo...
Seen it all, Done it all.
Can't remember most of it.

Lifetime Member
My Profile  My Blog  My Position  Send Message

AnswerID: 101298

Follow Up By: DINGO - Sunday, Mar 06, 2005 at 11:37

Sunday, Mar 06, 2005 at 11:37
Thanks for that Bob Y,
i did know about the lube of the pump, but not the cooling idea.
so it seems the gauge probably is ok.
where does the long ranger fit? do you have to remove your spare???
0
FollowupID: 359268

Follow Up By: Bob Y. - Qld - Sunday, Mar 06, 2005 at 13:18

Sunday, Mar 06, 2005 at 13:18
Dingo,

Long Ranger tank fits where spare and aux tank now reside. Is a good fit, and even with std height springs, doesn't hang below the rear axle.
As we had a rear wheel carrier, from the 90 model, this was fitted to the current cehicle.

In hindsight, wish we had purchased a Kaymar twin carrier and rear bar with the previous vehicle. They are now around $3K, I believe.

Have had no probs with the tank, except when it comes time to fill it! We can comfortably travel from south of Winton, to Toowoomba, on both tanks, almost 1500 kms. There might be some weight penalty, initially, with economy, but achieved 12-14L/100km, on recent trip to Brisbane and back.( 80 is multi-valve turbo)

Unless one was doing a lot of long trips, the original fuel set-up, is adequate. Our '90 model could achieve up to 1,000km range, and the bigger tanks cost over $1100 fitted.

Hooroo...
Seen it all, Done it all.
Can't remember most of it.

Lifetime Member
My Profile  My Blog  My Position  Send Message

0
FollowupID: 359278

Reply By: Coops (Kalgoorlie) - Sunday, Mar 06, 2005 at 14:54

Sunday, Mar 06, 2005 at 14:54
I have 96 Std 80 series and original tanks were 90 litres and 55 litres I believe. I have since replaced sub tank with LR tank. Used to get about 300-350 kms per sub tank depending on conditions.
Hope this helps
AnswerID: 101320

Sponsored Links

Popular Products (14)