L300 Leaking fuel injection pump head

Does your Mitsubishi L300 make a strange noise? Need wheel alignment specs?
ontheebrink
Posts: 35
Joined: Mon Nov 13, 2017 4:01 pm
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: delica l300
Location: san francisco

L300 Leaking fuel injection pump head

Post by ontheebrink » Tue Mar 26, 2019 2:03 pm

Thank you Growlerbear. Good timing on that as well. I just got the seals so I guess I'll give it a shot. The local shop want's to charge $1000 to replace the seals so I'll save some cash if I don't break anything.

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Thu Mar 28, 2019 11:39 am

Keep us updated...I may need to do a complete rebuild on mine and really want to know how it goes, especially (non)timing wise!
My dad used to say,"If you can read, you can do anything!"

ontheebrink
Posts: 35
Joined: Mon Nov 13, 2017 4:01 pm
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: delica l300
Location: san francisco

L300 Leaking fuel injection pump head

Post by ontheebrink » Fri Apr 05, 2019 10:35 am

I wimped out. After thinking about it I took it to a mechanic. Since it's my daily driver I can't afford to have it out of commission for a few days while I try to fix the timing or wait for the mechanic to have time to look at it. If I had another car I would have gone for it.

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Fri Apr 05, 2019 11:31 am

I hear ya. I'm in the same boat. May take a few days off work just to take the pressure off...
My dad used to say,"If you can read, you can do anything!"

D.S.S.
Posts: 1
Joined: Sat Apr 06, 2019 6:57 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: Delica Exceed
Location: Chilliwack

L300 Leaking fuel injection pump head

Post by D.S.S. » Sat Apr 06, 2019 7:24 am

Mine started leaking badly last week from the lower plate next to the engine. I changed the O ring in place. There was very little space but managed to get it back on after slightly shortening the rear bolt. There is a still a very slow leak from the large plug at the rear. I will be ordering the socket from ebay for that one next. Great timing on your post. - Thanks .

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Wed Jul 10, 2019 11:28 am

you can remove the IP without disturbing the timing. Or, at least, reinstall the IP in exactly the same orientation it was.
Thinking about this... When you remove the pump, do you need to mark the gear's location somehow so the pump's internals are where they were when you removed it, or does it matter? (I'm thinking it must matter...) :-?
My dad used to say,"If you can read, you can do anything!"

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Sun Aug 04, 2019 2:51 pm

I heard Falco saying,"READ THE MANUAL" so I did. (TDC and the IP sprocket will be at the timing mark!)

I have successfully rebuilt the Injection Pump, following the Brickyard post, which is very thorough. I HIGHLY RECOMMEND reading it all the way through a couple of times before you jump in, ESPECIALLY the parts about photographing and/or marking ALL parts for re-assembly orientation and adjustment purposes (I managed to miss the fuel adjustment screw and the throttle lever location on the throttle shaft). All in all, it actually wasn't as difficult as I thought it would be.

NOTE: Make sure the woodruff key doesn't fall out of the drive shaft when you are removing the pump (or installing the pump) and drop down the timing belt lower cover - fishing with a magnet is very time consuming! :shock:


Many thanks to GrowlerBear for invaluable tips along the way!
My dad used to say,"If you can read, you can do anything!"

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Fri Aug 09, 2019 5:55 am

I think I've figured out what everything on the IP does except this thing attached to the top of the throttle shaft:

IP.jpg
IP.jpg (23.47 KiB) Viewed 283 times

Seems to monitor the throttle position but for what purpose?
My dad used to say,"If you can read, you can do anything!"

sk66
Posts: 177
Joined: Thu Oct 06, 2016 3:24 pm
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: '91 Delica L300
Location: Pennsylvania, USA

L300 Leaking fuel injection pump head

Post by sk66 » Sat Aug 10, 2019 9:32 am

deskinthewoods wrote:
Fri Aug 09, 2019 5:55 am
Seems to monitor the throttle position but for what purpose?
A/T shift point
Steven
1991 L300
Harrisburg, PA

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Sat Aug 10, 2019 1:46 pm

Nope. Manual Transmission.
My dad used to say,"If you can read, you can do anything!"

User avatar
Growlerbearnz
Posts: 2016
Joined: Sat Jun 26, 2010 1:58 pm
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: Delica P25W
Location: New Zealand

L300 Leaking fuel injection pump head

Post by Growlerbearnz » Sat Aug 10, 2019 2:42 pm

deskinthewoods wrote:
Fri Aug 09, 2019 5:55 am
Seems to monitor the throttle position but for what purpose?
Primarily for the Exhaust Gas Recirculation. The ECU only allows EGR when the engine's hot, running over 1500rpm (from memory), at low load (throttle position). At idle or high load you want EGR to turn off.

Secondary use is for the glow plugs. When the engine's cold the glow plugs will continue to run for a minute or so after the engine starts, if you start driving the ECU will cycle the plugs on and off at different rates depending on throttle position.

I don't know what happens if you remove or unplug that sensor. It's possible the glow ECU won't function correctly.

The L300 automatics are entirely mechanical/hydraulic, no electronic sensors at all. Throttle position on an auto is by cable attached to the IP linkage (the cable usually has an orange boot).
Nothing says "poor workmanship" more than wrinkles in the duct tape.

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Sat Aug 10, 2019 7:13 pm

GB, is there anything you don’t know? :-D
My dad used to say,"If you can read, you can do anything!"

User avatar
Growlerbearnz
Posts: 2016
Joined: Sat Jun 26, 2010 1:58 pm
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: Delica P25W
Location: New Zealand

L300 Leaking fuel injection pump head

Post by Growlerbearnz » Sun Aug 11, 2019 2:12 am

LOL! It only looks that way because if someone asks something I don't know, I tend not to say anything. :-)
Nothing says "poor workmanship" more than wrinkles in the duct tape.

User avatar
deskinthewoods
Posts: 133
Joined: Thu Mar 08, 2018 10:35 am
Member's Photo Album: http://www.delica.ca/Photos/
Vehicle: 1991 L300 Star Wagon named "Wilson"
Location: Wakefield, Québec

L300 Leaking fuel injection pump head

Post by deskinthewoods » Sun Aug 11, 2019 4:16 am

“Better to remain silent and thought a fool than to speak and remove all doubt.” - Mark Twain

:-D
My dad used to say,"If you can read, you can do anything!"

Post Reply

Return to “L300 Technical”