D4D Diesel Smell

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@theronwillie
Newbie
Posts: 3
Joined: Tue Feb 13, 2018 9:46 am
Town: Centurion
Vehicle: D4D Hilux
Real Name: Willie

Tue Feb 13, 2018 10:18 am

Hi Guys

I recently noticed that my 2.0 D4D smells like Diesel. After I removed the engine cover I noticed diesel between the fuel rail and glow plugs. At first i cleaned the Diesel , but it returned. What can the possible cause be for this diesel leakage. I did not spot any leak from the fuel rail. See below/attached pictures.

regards
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20180128_102217-768x1365.jpg

Mars
LR4WD, Lockers, Crawler Gears
LR4WD, Lockers, Crawler Gears
Posts: 1162
Joined: Mon May 07, 2012 12:33 pm
Town: Pretoria
Vehicle: Toyota Hilux 3lt D4D DC 4X4
Real Name: Marnus

Tue Feb 13, 2018 11:20 am

The fuel rail works at extremely high pressures. This could mean that the slightest leak will appear very quickly and it may spray diesel over a distance. You will need to try and find that leak somewhere in that vicinity. If it is towards the rear of the cylinder head as it would seem to be on the photo then the fuel return line also runs from there. You also have the sensor for the fuel rail pressure sitting there so there are a number of possible sources of a leak in that area. You will need to dry everything as thoroughly as you can and see if you can trace it. There must be dampness leading from the source. Has anyone done any work there recently?

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Rigger
Low Range 4WD
Low Range 4WD
Posts: 142
Joined: Mon Dec 07, 2015 1:03 pm
Town: Oudtshoorn
Vehicle: Toyota Hilux 3.0 S/C 4x4
Real Name: Martiens

Tue Feb 13, 2018 6:30 pm

If possible clean it with petrol and blow it dry with compressed air. Then check for leaks at the nuts on the fuel rail and injectors. The injector pipes sometimes crack just in top of the farrel where it seals. Secondly if all that is fine, spray some soapy water on the injector and look for bubbles around the injector where it exits the head. If there is then the seals inside the head are shot and needs replacement.

@theronwillie
Newbie
Posts: 3
Joined: Tue Feb 13, 2018 9:46 am
Town: Centurion
Vehicle: D4D Hilux
Real Name: Willie

Wed Feb 14, 2018 8:34 am

Thanks for all the help guys. I will attempt to repair shortly and notify you with the outcome.

@theronwillie
Newbie
Posts: 3
Joined: Tue Feb 13, 2018 9:46 am
Town: Centurion
Vehicle: D4D Hilux
Real Name: Willie

Wed Feb 21, 2018 9:56 am

Hi Guys,

Found the leak on the fuel rail on the fitting of cylinder 1. Tighten it and seems to be fine now.

Thank you for all your help.

Regards

Mars
LR4WD, Lockers, Crawler Gears
LR4WD, Lockers, Crawler Gears
Posts: 1162
Joined: Mon May 07, 2012 12:33 pm
Town: Pretoria
Vehicle: Toyota Hilux 3lt D4D DC 4X4
Real Name: Marnus

Wed Feb 21, 2018 10:53 am

Good to hear. Thanks for the feedback.

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