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XLsior · 02-02-2024, 03:24 AM

I was experimenting with WVO and diesel blends on my Deli that just clicked 250k.
For awhile i thought all was ok for about 1-2hrs of driving.

heading home up the range engine starts getting the hiccups and losing power...I just managed to get home and pulled into the garage...

I proceeded to change the filter...then the injectors. In the hope my 4m40T running woes were not critical. Well it was clatter-choofingly apparent my alternative fuel experiment might have pushed the old ZEXEL/Bosche pump to much.

So I went down the rabbit hole of removing the pump from its grip and opted to take it to my local diesel pump/injector service specialist, Which is North Coast Diesel Service

All they do is diesel injector pumps for over 20 years.

I called and told them my issue and they said "yep, bring it in"

Bit of chin wag later and a few days and my pump was ready...I also asked if they could give me a bit more poke on boost...with the response being "10%"...sounds good to me.

They also removed some Japanese winter spec coolant line gubbins so (simplified) with the final service price $1280 total.

I was told these pumps don't like bio fuels, I was informed the new seals were more tolerant of bio fuels, but they will not cover their warranty if bio fuels are used (1year/20000km)

Anyway I just spent the day putting it all back together with a drained tank and fresh diesel purged...flushed and primed the lines...Anxiety...turn key and vroom....relief.

I am yet to drive it and test the 10% boost. But hearing the engine run healthy again is all the confirmation I need to know the guys at NCDS know their shit.

Well I fired up the van in the garage hoping to bleed the air out of the coolant lines after buttoning it all up...
and it started chuffing again all kinds of colored smoke came out of the pipe.

I managed to unstuck the clutch and back out of the garage to clear the air a bit but it konked out again...

Multiple start attempts with long no fires and then occasional idle to weak idle...hit the pedal and get some revs but it would chuff up and konk out repeatedly...

Which implies a failed head gasket or cracked head all along....

In other words my injection pump was probably fine...so there goes $1280 in a puff...Nothing against North Coast diesel Service.

the problem was me and my path of reasoning.

So, I do have a head gasket spare...But I'm in again for time and bleeding knuckles with a set of head bolts and hopefully not a cracked head.

The oil is fine and level but there was some condensation when removing the cam cover and I did notice my coolant expansion tank level was dropping but also holding pressure...

Loss of compression is my only remaining factor after sorting out all the related fueling potential issues, which by all accounts and $ was resolved...

The joys of 25year old 4wd motoring...I wanted a vehicle to wrench on...I guess I'm in the deep end now.

02-02-2024, 03:24 AM	#22
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,282	I was experimenting with WVO and diesel blends on my Deli that just clicked 250k. For awhile i thought all was ok for about 1-2hrs of driving. heading home up the range engine starts getting the hiccups and losing power...I just managed to get home and pulled into the garage... I proceeded to change the filter...then the injectors. In the hope my 4m40T running woes were not critical. Well it was clatter-choofingly apparent my alternative fuel experiment might have pushed the old ZEXEL/Bosche pump to much. So I went down the rabbit hole of removing the pump from its grip and opted to take it to my local diesel pump/injector service specialist, Which is North Coast Diesel Service All they do is diesel injector pumps for over 20 years. I called and told them my issue and they said "yep, bring it in" Bit of chin wag later and a few days and my pump was ready...I also asked if they could give me a bit more poke on boost...with the response being "10%"...sounds good to me. They also removed some Japanese winter spec coolant line gubbins so (simplified) with the final service price $1280 total. I was told these pumps don't like bio fuels, I was informed the new seals were more tolerant of bio fuels, but they will not cover their warranty if bio fuels are used (1year/20000km) Anyway I just spent the day putting it all back together with a drained tank and fresh diesel purged...flushed and primed the lines...Anxiety...turn key and vroom....relief. I am yet to drive it and test the 10% boost. But hearing the engine run healthy again is all the confirmation I need to know the guys at NCDS know their shit. Well I fired up the van in the garage hoping to bleed the air out of the coolant lines after buttoning it all up... and it started chuffing again all kinds of colored smoke came out of the pipe. I managed to unstuck the clutch and back out of the garage to clear the air a bit but it konked out again... Multiple start attempts with long no fires and then occasional idle to weak idle...hit the pedal and get some revs but it would chuff up and konk out repeatedly... Which implies a failed head gasket or cracked head all along.... In other words my injection pump was probably fine...so there goes $1280 in a puff...Nothing against North Coast diesel Service. the problem was me and my path of reasoning. So, I do have a head gasket spare...But I'm in again for time and bleeding knuckles with a set of head bolts and hopefully not a cracked head. The oil is fine and level but there was some condensation when removing the cam cover and I did notice my coolant expansion tank level was dropping but also holding pressure... Loss of compression is my only remaining factor after sorting out all the related fueling potential issues, which by all accounts and $ was resolved... The joys of 25year old 4wd motoring...I wanted a vehicle to wrench on...I guess I'm in the deep end now.
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