TD6 4.2 TDI motor in the GU...Wheez Wheez

Chris,

I had the same opinion when I purchased mine last year. Admittedly I came out of a GQ 4.2 d running a super charger so I did expect a little difference but not as drastic as it was. I was tempted to throw mods at the vehicle to resolve the problem but was convinced by a diesel mechanic who knows what he's talking about to leave it alone, let it run in and then decide what to do. I've just clicked over 60,000 k's and the car is a totally different vehicle. At about the 35 000 mark it all started to loosen up and from then on has just got better. I originally thought it was just me getting used to it but I recently took a mated out for a run which had less the 5k on the clock and the difference is amazing.
If you can't wait to clock up the k's around town do what I did and go for a run up through the Kimberly and Gulf country. Both you and the truck will love it :)

If your discription is correct in blowing smoke etc
I would go to another dealer and try again.

Speak to AG Diesel in Melbourne they are claiming 20-30% more power with no turbo mods... IMHO it would be bullbleep

Agree with above posts. Mine feels better every day and has about 6000km on it. Going to Perth in the near future so that should help a lot.

Spoke to a guy with about 40,000km and he was rapt. Rekons the harder he pushes it the better it goes now!!

Jamie

Chris, The other blokes have got it in ONE. Mine also had nearly 40,000 on the clock b4 it loosened up. Bigger exhaust will also help it to breathe and IMHO you could do that now rather than later...up to you. Also, at around 20,000, it would pay to have the injectors done (spray pattern and quantity) and the pump re-calibrated. I had this done at about that many k's by B E R R I M A D I E S E L & it made a helluva difference.

chris

My TD6 is also totally gutless to drive at highway speeds and even worse with a load on. Fuel economy with a load is WOWFUL.

The EGR has certainly stuffed things up, or it seems so, becuase this motor bears no resememblence to what others say with their Non EGR motors.

I had mine put on a dyno. If there is anyone who reckons their TD6 goes great and is economical under load I would be interested to hear because the dyno indicated my motor is as expected and even better than some others that have been tested. Mine has 30,000ks on it and is not better than when it was new.

I really cant see how putting another 30,000ks on it will improve fuel economy 20 to 30 percent.

Sean

Chris M, yours is a problem we commonly strike. Denco offer a TD42T upgrade system which completely replaces the existing turbo. I have included the dyno figures we achieve in one of our recent fitments. The vehicle had done around 80,000 kms at time of fitment and should have well and truly been run in!

SPEED REAR WHEEL HP
BEFORE AFTER

120 83 108
110 79 100
100 77 95
90 70 85
80 59 74
70 50 63

As you can see, the flat spot is virtually non-existent after the Denco system is fitted, with a noticeable increase in power. (can email a graph for those interested sales@dencodiesel.com , not too savvy about how to post the graph on the forum, LOL)

We are also diesel fuel injection specialists, so why have we chosen this pathway for the low power problems? The replacement of the new turbocharger improves the efficiency of the engine using the same fuel. Other modifications increase the fuel to obtain power increases. While in theory the sky’s the limit with increasing the fuel, the longevity and reliability of your vehicle will be placed at stake.

We frequently assess damaged pumps which have been over fuelled. Modifying your pump can impact on warranty as the work still needs to be within manufactures specifications.

Regarding your vehicle warranty, this is a very touchy issue, and you are best to speak to your dealer about what modifications or aftermarket additions or alterations might impact on your warranty.

Something to check which could be affecting your power is the fuel pump timing. This can sometimes be below specifications. Fixing this to within specs would not affect your warranty. Refer to the Association of Australasian Diesel Specialists ( www.aads.com.au ) for your closest diesel fuel injection specialist.

Hi all,

Very interesting ( and comforting) to read! I purchased a new TD6 in late July 2004(built June) and have been enjoying it greatly.

I came to it from a 1991 Ti normally aspirated GQ 4.2 oiler with 300,000 on the clock, and was initially very impressed with the TD6. Over the past few weeks, as I became more familar with it, I have decided it is a bit spongy in the get up and go department, although fuel consumption appears at this point not much worse that the GQ.

Mine now has 3600 k's and it makes sense that the new oiler will require time and K's to loosen up some. The idea of a running in session to the Kimberly sounds the go, although a few weekend runs in and around SE QLD will have to do for the tiem being. Anxious to get some K's on it so I can drag the boat with it as well.

Cheers,

Len