diesel injector pump seals

matwelli · Post by **matwelli** » Mon Jul 17, 2006 7:33 am

Hi, has anyone here changed the seals on thier pump.

Changing tyres yesterday and notice diesel fuel dripping out while I had the front jacked up.

Any thoughts ?

tristanp · Post by **tristanp** » Mon Jul 17, 2006 9:20 pm

ive done a few now, do it in place , make sure you clean the centre of the throttle wheel bolt and make a note of where the line in the centre goes, this is important when it goes back together, undo fuel in/out lines , remove throttle cable bracket remove throttle wheel , undo the top cover bolts on the pump (can be really hard, i used impact screwdriver sockets and a 8mm ring spanner) as the cover comes off make sure you notice the governer move back then you lift the cover off, you will need somthing to push this back over to get it back down ( i used a flat blade screwdriver) make sure you dont get anything in the fuel resivour - dirt etc, replace the oring on the throttle shaft , clean everything as well as you can install new seal and reassemble as it came apart- then bleed the lines and get the throttle back in the same position ( took a few goes to get position right both times), the auto bleed on some models is a pain and needs lots of cranking over to bleed (only bleeds while starter is engaged) manual bleed was easy- loosen bolt , plunge till diesel goes everywhere then lock the bolt

matwelli · Post by **matwelli** » Tue Jul 18, 2006 11:01 am

Thanks for that, will give it a go tonite

oldblue · Post by **oldblue** » Tue Jul 18, 2006 12:51 pm

Do's this apply to most pumps( diesel) You dont say which pump?In line and rotary

tristanp · Post by **tristanp** » Tue Jul 18, 2006 5:16 pm

the nissan patrol has a rotary pump- like most other jappers. i dont think ive seen an inline pump that leaks yet...

matwelli · Post by **matwelli** » Sat Jul 22, 2006 7:53 pm

tristanp - right on the money with your description, seals replaced, leak fixed.

only minor dramas were getting the governer arm out of the way when putting the housing back on, and 3 attempts to get the throttle shaft on the right spline.

Took a little while to do, being an exceed had to remove the intercooler and the throttle position sensor, brackets, wiring etc to actually get to the 4 allen head bolts.

Thanks again for the advice.

tristanp · Post by **tristanp** » Sun Jul 23, 2006 6:00 pm

first time i did it on my own rig one of the alan screws holding the accelerator bracket to the pump striped out the centre of the hex so i just bent the bracket out of the way, then bent it back later -glad to hear it all worked out