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Leak on Fuel/Injector Pump

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bigone
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Joined: 31 Dec 2009
Posts: 49
Location: wiltshire

PostPosted: Wed May 08, 2013 20:30    Post subject: Reply with quote

Next time...next time...I WILL do it myself (another 180,000 miles?). Great to know somebody else was able to do it!  Very Happy  The lesson is 'don't take it to your Toyota dealer UNTIL you have checked with the Forum'. Once it can't easily be taken back you are 'hooked'  Evil or Very Mad
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2001 100 Series 4.2 TD VX auto, 225,000 miles and all mine!
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NIDIRWATCHMAN
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Joined: 24 Dec 2015
Posts: 2
Location: Scotland

PostPosted: Sun Jan 24, 2016 18:20    Post subject: Reply with quote

Hello
If you experience any fuel leaks from an IP it is usually due to the IP
Seals have started to shrink in size. This is a common problem with IP in cars pre 2000. This is the year that low sulphate diesel fuel started to be sold on fore courts. Post IP seals are designed to handle this low sulphate fuel a lot better.

So if you experience a leak like this which is not due to an obvious loose connecto, then there is an easy answer.

Add some  brake fluid to your fuel tank,not much about 100 ml and run the engine. The fluid will cause your Internal IP seals to expand back to their original size and seal again. Remember low sulphate fuel will shrink pre 2000 injector pump seals

You will find more examples on the MisubishI pajero owners club site.

My 93 pajero had this problem but I was amazed at how quickly the
brake fluid trick worked.
By the way I still have the pajero now at 290 000 miles with same IP and original seals. I regulary give it some brake fluid every  couple of months to prevent shrinkage.
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bigone
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Joined: 31 Dec 2009
Posts: 49
Location: wiltshire

PostPosted: Sun Jan 24, 2016 19:48    Post subject: Reply with quote

Now that's AMAZING!  Shocked Obviously not appreciated by many, it seems to me. In any case, if the problem re-appears it is easy to try the brake fluid solution before shelling out a small fortune - many thanks for such a novel insight. Will consider periodically lacing my fuel now....anybody any thoughts on burning a little brake fluid (eg lacquer build etc up on anything important)?
And now the obvious question.....My Nippon Denso pump was rebuilt, presumably with new seals. Is it likely that the replacement seals used for an 'old' pump design are likely to be tolerant of the change in fuel make up? Or, putting it another way, would replacement seals more likely be to the original spec (ie will shrink again)? TIA
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2001 100 Series 4.2 TD VX auto, 225,000 miles and all mine!
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Sumi
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Joined: 26 May 2019
Posts: 1
Location: Hungary

PostPosted: Sun May 26, 2019 18:42    Post subject: Reply with quote

Hello!

I have a leak on my 1HD-FTE fuel injection pump, but I think it's not from the TCV, but from beneath the circled bolt on the following picture:

< and here is where the picture would be if I was here for long enough:D >

Oh, how could I explain it.. On the left side, at the bottom of the pump there is a plate with a prutroding cylinder shape buldge on it. The plate is about 4cm wide, and too hex bolts are holding it in place. One bolt is at 8 o'clock, and the other is at 2 o'clock - when looking from the side of the pump. Basicly these are the only hex bolts on the side of the pump. The plate is almost at the same level as the TCV is, just left of it. The offending bolt is the left one, so the one at 8 o'clock...

Interestingly it's seems like it's not comming from under the plate (that the two bolts hold in place), but comming right at the head of the bolt.

I was thinking of removing that one bolt & applying some silicone to it & reinstall bolt. I'm just not sure that the other bolt is enough to support the plate while the problematic one is removed.

I guess removing the whole plate & replacing it's gasket in situ is not a good idea?

Cheers for any of your thoughts!
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