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Mechanical fuel pump bottom outlet.

Tech Talk for Suzuki owners.

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Posts: 28
Joined: Sun Apr 06, 2008 10:45 am
Location: bris

Mechanical fuel pump bottom outlet.

Post by mk_mike »

guys can anyone help.

i've just bought a 91 sj70 (g13b) and am chasing a massive oil leak from the back of the block. I originally thought it was a rear main and have removed gearbox and clutch only to find it clean as a whistle. while under there though i noticed a metal nozzle coming out of the bottom of the fuel pump with no hose attached to it, this nozzle comes out heading towards the firewall and then angles down to end up pointing to the transmission. it would sit directly above the starter motor which was covered in engine oil.
my question is what is it for, is it supposed to have a hose on it and if so where the hell does it go to cause i can't work it out.
cheers,

Mike.
92 80 series with herbs and spices
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Post by Gwagensteve »

91 is the magic age for fuel pump failure in sierras IMHO.

It's time for a new fuel pump.

The tube you refer to is the drain that leaks when the fuel pump is shot.

Steve.
[quote="greg"] some say he is a man without happy dreams, or that he sees silver linings on clouds and wonders why they are not platinum... all we know, is he's called the stevie.[/quote]
Posts: 28
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Location: bris

Post by mk_mike »

so if the fuel pump has had it it leaks motor oil out that drain?
92 80 series with herbs and spices
zook for sale
Posts: 7345
Joined: Wed Jun 02, 2004 3:29 pm
Location: Melbourne

Post by Gwagensteve »

Yep. They'll either leak oil, or fuel out of that breather, depending on which seal fails. It's a warning in either case. It's possible to block that breather up (and I've done it in the past) but the next failure will be the diaphragm on the pump and you'll fill the sump up with fuel (because the fuel can't come out of the breather to keep the engine safe)

Steve.
[quote="greg"] some say he is a man without happy dreams, or that he sees silver linings on clouds and wonders why they are not platinum... all we know, is he's called the stevie.[/quote]
Posts: 28
Joined: Sun Apr 06, 2008 10:45 am
Location: bris

Post by mk_mike »

thanks dude. i was pulling my hair out over that one

i removed the transfer, gearbox and clutch to replace seals and it was something this simple all along :roll: . ah well i had to degrease the box down anyway lol.

cheers,
Mike.
92 80 series with herbs and spices
zook for sale
Posts: 3098
Joined: Sat May 28, 2005 3:22 pm
Location: Melbourne, Australia

Post by PJ.zook »

While its out you may as well replace the rear main anyway. Buy a genuine Suzuki seal too, aftermarket seals just arent worth it. Its a bastard having to remove the box again after a month cos its started to leak again... beleive me i know. And when a certain Exhaust shop in Waverley made a complete fark up of youre exhaust system, its a bastard to get the box out.
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