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gq 4.2 diesel leaking injector pump

Tech Talk for Nissan owners.

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gq 4.2 diesel leaking injector pump

Post by ssfabricator »

the gq is leaking fair bit of diesel ive found where its coming from. on the back side of pump facing firewall its at the top. Its a brass bolt with reverse thread lock nut on it . any ideas what this bolt does with the locknut it suggests its set to a certain position would it have a o ring or ??????????
Any help greatly appreciated i have a photo on my phone and will try to upload
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Posts: 404
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Post by ssfabricator »

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Post by blackmav »

Sounds like your fuel adjustment screw.
It has a o ring on it.
Carefully undo the the lock nut, then count how many turns till out.
Replace o ring, replace screw the same number of turns.

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Post by trains »

Better off, mark accurately with a scribe with reference to the top housing.
Then do as mentioned.

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Post by zagan »

o-rings and seals on the wayout.

Replacing the o-ring/s will put extra pressure on the seals so it'll leak again latter on down the track but that time around it could be the seal going rather than o-ring/s.
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