turbo deisels overfueling

[Tiny]

I have posted this in the TOYO section as the engine in question is a 1HZ from 100 sereis, however this relates to any aftermarket turbod engine so please read on.

A mate of mine with a 98 100 series with a 1HZ fitted with a turbo by a certain company just south of Sydney, has had some issues.

basically when the turbo was fitted back when the engine had 2000km on the clock (ODO now 156000Km) the fuel pump was set wrong and was ovre fuelling. At 100000Km he took it to west end for some work and the found this problem and rectified. now at 156000Km the streses cuesed have finally caused the engine to die the result is number 6 piston has a largecrack and all the other pistons have signs of hairline cracks.

The overfueling problem would have been picked up had an EGT (exaust temp gauge) been fitted.

This is apparently not an uncomment prob with the co in question.

In addition any vehicle full stop with aftermarket turbos fitted or increased boost turbos shopud have an egt fitted and have a turbo service frequently as apparently the fuel pump can begin to over fuel over times.

[mickbeny]

Hi all...It seems strange to me that the original fitters got a 100000klm without engine problems.Then west end comes along and the engine blows 50000klm later.Ive been to both,and although westend have the modern high tech workshop,westend were the ones who had my engine overfueling and overheating,but didnt it go.I hope westend hasn't caused irrepairable damage to my engine from when i overheated it.

[Tiny]

Hi all...It seems strange to me that the original fitters got a 100000klm without engine problems.Then west end comes along and the engine blows 50000klm later.Ive been to both,and although westend have the modern high tech workshop,westend were the ones who had my engine overfueling and overheating,but didnt it go.I hope westend hasn't caused irrepairable damage to my engine from when i overheated it.

It wasn't West End that caused the damage, rather identified the isseu and tried to rectify

[Gribble]

I have posted this in the TOYO section as the engine in question is a 1HZ from 100 sereis, however this relates to any aftermarket turbod engine so please read on.

A mate of mine with a 98 100 series with a 1HZ fitted with a turbo by a certain company just south of Sydney (who also offer B&B) has had some issues.

basically when the turbo was fitted back when the engine had 2000km on the clock (ODO now 156000Km) the fuel pump was set wrong and was ovre fuelling. At 100000Km he took it to west end for some work and the found this problem and rectified. now at 156000Km the streses cuesed have finally caused the engine to die the result is number 6 piston has a largecrack and all the other pistons have signs of hairline cracks.

The overfueling problem would have been picked up had an EGT (exaust temp gauge) been fitted.

This is apparently not an uncomment prob with the co in question.

In addition any vehicle full stop with aftermarket turbos fitted or increased boost turbos shopud have an egt fitted and have a turbo service frequently as apparently the fuel pump can begin to over fuel over times.

Me thinks you should take out the B&B bit, or RUFF wont like you muchly.

Besides that, its not the first time a 1hz has dropped its lunch coz a turbo was fitted. My old TAFE teacher has a whole shelf in his cupboard with Landcruser and Hilux pistons that cracked coz dudes fitted turbo's them. Even setups that were correct/safe had caused a few cracks.

Lets get one basic fact straight, if you modify anything from what the engineers in japan designed from factory then you greatly increase the risk of something shitting itself.

Do people not grasp this concept? Just coz someone elses 80 has been running on 1000psi of boost for the last 5 years doing runs flat chat up and down the pacific highway without overheating doesn't mean yours will.

I think your mate should get over it.

[Tiny]

point taken, but this is still a motor wich was before and has since been fited with factory turbo and still given the fact Toyota ahs the reputation it has not a desirable thing

[v8zuki]

1hz not the same as 1hdt turbo
totally different engines although they look similar

[sootygu]

I deal with a engine reconditioner who has rebuilt several after market turbo 100 1HZ engines, he replaces the piston with 80 series not 100 series for they are less likely to crack according to him.

[blackmav]

I know of a specialized diesel shop south of Sydney that has got a great reputation within the 4WD monthy-4x4 Australia readers BUT they do not have a dyno? Surely if they were to get the optimum settings when they fit turbos they would have one. Their claim is that they can do there set ups by driving up a big hill that they know comparing before and after runs. Did the shop set it up on a dyno??
Also could it be an injector problem? as in when injectors arn't spraying properly they dont atomize the fuel but shoot a jet of diesel onto the top of the piston causing cool spots then cracks. (probably not the best way to describe it but I think I got it out)

[Hoonz]

1hz not the same as 1hdt turbo
totally different engines although they look similar

what he said ... 1hdt engine is a turbo spec engine
1hz isn't ...

[Tiny]

I know of a specialized diesel shop south of Sydney that has got a great reputation within the 4WD monthy-4x4 Australia readers BUT they do not have a dyno? Surely if they were to get the optimum settings when they fit turbos they would have one. Their claim is that they can do there set ups by driving up a big hill that they know comparing before and after runs. Did the shop set it up on a dyno??
Also could it be an injector problem? as in when injectors arn't spraying properly they dont atomize the fuel but shoot a jet of diesel onto the top of the piston causing cool spots then cracks. (probably not the best way to describe it but I think I got it out)

that would be the shop....but the hill is very accurate

[bj on roids]

overfuelling is good, it makes them go faster

more air (turbo) + more fuel = diesel go fast

the drawback is significantly reduced engine life, particularly if revving high.

the power comes with reduced life... big deal..

150k... time to sell it and buy a new 100 series.

[nismo_simo]

You can actually have too much fuel with turbo's, they run like shit! Tuning the right fuel mixture is difficult and might be better done on a dyno that measures air fuel ratio mixtures.

[beachbuggy]

yeah, i guess getting a dyno to read what you want would solve all the problems and their 1000's of happy turbo customers must all be wrong....or could it be that westend overfuelled the engine and blew it up.
Still looking for all the other blown engines from this workshop considering they fit average of 1 a day (according to mtq) there hould be a few around....where are they?

[Daisy]

overfuelling is good, it makes them go faster

more air (turbo) + more fuel = diesel go fast

the drawback is significantly reduced engine life, particularly if revving high.

the power comes with reduced life... big deal..

150k... time to sell it and buy a new 100 series.

overfuelling also sees the temps go significantly higher...

its not something that any backyard mechanic could do.. needs to be tuned with a pyro to ensure it dont get toooooo hot

TOM

[beachbuggy]

overfuelling = black smoke
if it aint smoking then the fuel is being burnt and used so it isnt 'over' fuelled.

[Carl Coight]

overfuelling = black smoke
if it aint smoking then the fuel is being burnt and used so it isnt 'over' fuelled.

This is not always so. With a pyro you watch your exhaust temp. Even without blak smoke you can still cook your engine.
Anything over about 550 degrees you start to get heat checking into your pistons, too much fuel and you will take the top out of a piston.
Carl

[brad-chevlux]

I have posted this in the TOYO section as the engine in question is a 1HZ from 100 sereis, however this relates to any aftermarket turbod engine so please read on.

A mate of mine with a 98 100 series with a 1HZ fitted with a turbo by a certain company just south of Sydney, has had some issues.

basically when the turbo was fitted back when the engine had 2000km on the clock (ODO now 156000Km) the fuel pump was set wrong and was ovre fuelling. At 100000Km he took it to west end for some work and the found this problem and rectified. now at 156000Km the streses cuesed have finally caused the engine to die the result is number 6 piston has a largecrack and all the other pistons have signs of hairline cracks.

The overfueling problem would have been picked up had an EGT (exaust temp gauge) been fitted.

This is apparently not an uncomment prob with the co in question.

In addition any vehicle full stop with aftermarket turbos fitted or increased boost turbos shopud have an egt fitted and have a turbo service frequently as apparently the fuel pump can begin to over fuel over times.

so what you're saying is that he got 152000km out of a modified engine....
he has done realy well to get that.
and i hope his next one last just as long.

[beachbuggy]

yeah tiny I think your a **nker he got 100k out of it and then west end mess witrh it and it blows up so he blames the initial fitters. Mate you are silly. Still, according to you these guys are doing this all the time so where are all the complaints about blown engines from aftermarket turbos from them??? You suck Tiny and so does yer mate

[GutSquisher Media]

S**t paople wake up and smell the roses, there are a lot of things that could of killed the motor. Putting the blame on a company (who fit the turbo's to the suppliers spec's unless requested otherwise) will not in itself kill the motor. Some questions need to be asked first.

1. What boost was the motor running was it played with after fitting?

2. What Exhaust temp was been reached at full load?

3. How long and often was the motor run at full load?

4. How do you now that the pump was overfueling (signs)?

5. History, was the motor ever over reved, or over heated?

After all this you can is answered, then you can make a informed decision.

But remember the under lying thing a modified motor unless hand built to suit the job will die before the an unmodified motor.

TD42 Running 23 PSI is my current rebuild if I get 3 years out of this one I'm happy.

P.S 4th motor all but one was rebuilt to suit the job it was designed to do.