Diesel pump leak

[Gazza96]

Hi guys
2.8 Gq std
Underneath the pump it a flat block off that has 2 bolts mine it appears to be leaking deisel from there, some times fast drip other times not much at all, anyone had this same leak? I'm not sure what's behind the blank of plate so haven't been keen enough to remove it as have no manuals for pump etc.

[the ferret]

If it's the one on the side, toward the front, then it's the advance plate "0" ring
PM Nizzbits and he will send you one.
Cheers, the ferret

http://i608.photobucket.com/albums/tt164/ferret/001-5.jpg

http://i608.photobucket.com/albums/tt164/ferret/004-3.jpg

[Gazza96]

thanks Ferret yep thats the plate! so just a O ring is there anything going to fall out when i remove that plate?

[the ferret]

thanks Ferret yep thats the plate! so just a O ring is there anything going to fall out when i remove that plate?

No it's cool mate, nothing falls out.
Two M6 bolts, fit the "0" ring to the plate and slide it on, that way it's easier to seat the "0' ring.
Cheers, the ferret.

[Gazza96]

ok i removed this plate............. what a bastard!! umm the Oring is square shouldered flat sided if that makes sence? is a std Oring ok to replace these?
BTW i dont have any idle or hard to start issue when warn so i am only replacing the Oring.

[the ferret]

ok i removed this plate............. what a bastard!! umm the Oring is square shouldered flat sided if that makes sence? is a std Oring ok to replace these?
BTW i dont have any idle or hard to start issue when warn so i am only replacing the Oring.

Yeah, it's easier if you take the battery out, the "0"ring is a special shape, but any "0" ring the same size should get you out of trouble.

Order the correct one through Nizzbits or go to a seal shop and see if you can find the correct one.
Cheers, the ferret.

[MC97GQ]

Gazza,

I had a similar problem on my TD42, I just bought a O ring selection from the local Auto Store and picked one out to suit, and it's been nearly 12 months with no problems.

Here is a link to my original posthttp://www.nissanpatrol.com.au/forums/showthread.php?4915-Fuel-Pump-Leak&p=167466

I hope this helps

Mark

[Gazza96]

Hi guys
I got a std O ring same size put it in fitted perfect ... But wouldn't start removed the oring put original back in at started first hit.. But leaked This is cold start not hot... So I'm sure it don't require the warm start modified plate.... Any ideas?

[the ferret]

Hi guys
I got a std O ring same size put it in fitted perfect ... But wouldn't start removed the oring put original back in at started first hit.. But leaked This is cold start not hot... So I'm sure it don't require the warm start modified plate.... Any ideas?

As I mentioned before mate, the o ring is available from Nizzbits, the genuine one is the correct shape, fit the correct one and you won't have a problem.
It is very important to centralise the o ring and make sure the plate is not pitted as they often are..
Cheers, the ferret.

[Gazza96]

Bought genuine oring and mod plate installed it.... Still drips and very noisy diesel sound from engine, swapped back to std plate and engine sounds much better but still drips grrr anyone know a honest diesel mech in Brisbane ??

[the ferret]

All I can think of now is that the pump housing is cracked, the new advance plate and o ring should have solved the leak, If the motor sounds noisy, it's probably too advanced.
You may need to dress the mountng face to promote a better seal with the o ring.
Cheers, the ferret.

[Gazza96]

Hi ferret
Setup 2 huge flood lights around fuel pump and found the real leak, there is a nut top middle front of the pump sits against
Timing cover, the leak is coming from under the nut, you cant remove the nut unless the pump is off but you can give it 4 turns to get about 3mm clearance to drop some gasket goo down there , I've done this but still leaking so I'm guess a hair line crack around there somewhere.

[nissannewby]

There was someone else on here who had the same issue i will find the thread and put a link up. Its actually an o-ring on your governor shaft, that nut is just a lock nut. This is a pump off and disassembly job which is best left for the professionals.

[nissannewby]

Here you go mate check this out also have a look at the detailed assembly link in this thread also. Hope this helps.

http://www.nissanpatrol.com.au/forums/showthread.php?12537-Any-decent-diesel-mech-s-on-this-site

[the ferret]

Ok Gazza, you need to wind the nut back as far as you can, then wrap good quality gas fitters thread tape around the bolt then tighten, if you have fuel leaking, gasket goo will not do the job, it will wash away.
Cheers, the ferret.

[Gazza96]

Time to find a good diesel pump service guy in Brissy , thanks so much for the help Ferret & Nissannewby this site is worth its weight in gold some times hard to explain your problem but you guys seem to kmow uy stuff.

[the ferret]

Try the thread tape mate, it may just save you a grand.
Cheers, the ferret.

[nissannewby]

If the thread is turned by accident and rotates the governer shaft this could cause more issues than he already has. If he only wants the leak fixed it shouldnt cost anymore than a few hundred.

[Gazza96]

nissannewby you sound like you know alot about these pumps do you do work on them?

[nissannewby]

Im a diesel fitter by trade and being in the industry helps with all this sort of stuff. I would love to be able to actually work on the pumps to get an even better understanding of them and how they work.

[Gazza96]

guy on QLD 4x4 on facebook has a pump for $350 .. his name is Damo think he must own a wreckers he is always selling stuff.. my worry is mine runs great except for leak , i i get another pump could have same issues.

[nissannewby]

Yeah i wouldnt get a secondhand pump. I can get pumps done depending on what needs to be replaced from 800-1600. 1600 is about the extreme of it when shafts and everythings gotta be replaced.

[Gazza96]

ahh ok cool.. if you know someone you would recommend to do the work PM me!

[Gazza96]

Do indeed any special tools to remove pump from car?

[nissannewby]

Nuh mate should be able to get it off with normal tooling. However make sure you line all timing marks up with NO.1 at TDC

[Gazza96]

Timing belt or chain I have no manuals.. Bought a service manual on gum tree and it never had 2.8 supplement grrr

[nissannewby]

Im pretty sure they are a belt. You have your 25 posts so grab the free one from here.

[the ferret]

Timing belt or chain I have no manuals.. Bought a service manual on gum tree and it never had 2.8 supplement grrr

Timing belt, tensioner and idler on the 2.8.
Cheers, the ferret

http://i608.photobucket.com/albums/tt164/ferret/2_8Timing.jpg