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NZExy Profile
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Date Registered: 03-2009
Location: Ch Ch NZ
TOTAL POSTS: 18
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Caution for T31 Diesel when towing


Thought this may be of help to fellow Diesel T31 owners. I did a search but couldn't find any other reference to it.
Did a short trip from Lake Brunner to Christchurch, NZ, towing my boat. All up weight of boat, trailer and stuff you chuck in the boat is around the 1300kgs give or take, so close to the auto's towing limit.
The road is SH73 which goes through the Southern Alps and a township called Arthurs Pass. Travelling from the Western side, there is quite a steep (16%) climb up the Otira Gorge and over the viaduct. Very spectacular country but a very demanding road.
Anyway, we were climbing up behind a group of cars at around 40kph in 2nd gear (selected) and the Exey does this easy with power available if required. The climb lasts about 10 minutes in total with 80% of it very steep. Weather was raining at a rate of 20mm per hour (very heavy) and a strong tail wind of about 30-40 kph.
We smelt a strange smell and thought it was a clutch from a car in front. We carried on and when we got to Arthurs Pass, around 10 minutes later, stopped for a toilet stop.
It was then we noticed the smell really bad. Braving the pouring rain, I jumped out of the truck and popped the hood to find the fabric heat shield behind the turbo protecting a rubber hose and various other stuff was glowing red and smoldering. We quickly doused the fire with water bottles, parked the Exey into the wind/rain with the hood open and called Nissan for advise.

As it transpired, there was only permanent damage to the heat shield but it had the potential to have been worse, especially in the Aussie environment where it is hotter and drier.

When we got back to Christchurch, we took the truck into Nissan who verified no damage. They have had one other case of this. No cure is available or intended.

I think a few things contributed to this.

1/ We had a strong tail wind roughly equal to our road speed which would reduce airflow around engine components markedly
2/ We were in a high load, high temp creating mode. ie, low gear, low speed, 80% to max throttle opening
3/ A poor choice of material for the shield. The turbo itself is shielded with metal shields and looks well insulated but obvioulsy heat gets past this. I think I will fabricate an aluminium shield and get rid of the fabric altogether.

Bear in mind that the manual T31 Diesel has a 2000kg tow rating so potentially has a higher chance of being in a high load situation

Anyway, I just thought a note on here may help someone who is in a similar situation one day.

Cheers from NZ
Tony

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2012 T31 Ti
7/Jan/2010, 2:04 pm Link to this post Send Email PM   Send Private Message
 
craig90 Profile
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Date Registered: 12-2009
Location: Brisbane
TOTAL POSTS: 90
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Re: Caution for T31 Diesel when towing


I've a question about the 1300kg towing weight of the T31 auto as i have one myself and i'm wondering if the 1300kg relates to just the tow rate or the full weight of what is also packed in the car. The reason i ask is the auto has a limit of 1300kg for fear of overheating the auto correct? So shouldn't the weight of goods packed into the car also be taken into account when towing such a weight?

One another thing, i think someone should make with a bonnet scoop for the turbo to suit the Exy as i'm concerned about the temp the Turbo could get to being confined to a small area between the motor and the firewall as NZEXY has stated above we should be a little concerned.

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X-1467 08 T31 TL Auto Platinum: Tinted Bonnet Protector, Tinted Windows, Fitted Seat Covers F&R, Rubber mats, Phone kit, Luggage Carpet, Weather Shields, Dash Mat, Tow bar, K&N filter, Twin screen DVD Player (the new Kingswood)
7/Jan/2010, 2:55 pm Link to this post Send Email PM   Send Private Message
 
JugglingOgre Profile
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Date Registered: 02-2009
Location: Hamilton, VIC
TOTAL POSTS: 77
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Re: Caution for T31 Diesel when towing


The 2000kg rating on my Manual TS is dependant on how much the trailer weighs and if there is a load in the vehicle as well. I don't have the details on me but it is a combination of vehicle/trailer weights that give you the maximum and the ball weights.

Cheers

Pete

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Pete & Jo
Hamilton VIC
X-1147(c)
2009 T31 TS Manual, Platinum, Windows Tint, Blue Tooth, Tow Bar, Roof Bars, Cargo Barrier, Floor Mats, Dual Battery, Bash Plates.
7/Jan/2010, 3:58 pm Link to this post Send Email PM   Send Private Message MSN
 
NZExy Profile
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Date Registered: 03-2009
Location: Ch Ch NZ
TOTAL POSTS: 18
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Re: Caution for T31 Diesel when towing


According to my manual, the trailer weight is independant of the vehicle load, so I can tow a 1350kg trailer plus have a full load in the vehicle.
For the record, that wasn't the case this trip. There were 2 adults and a child and some overnight gear. No where near any max load weight.

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2012 T31 Ti
7/Jan/2010, 6:41 pm Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Caution for T31 Diesel when towing


Tony,

The trailer weight reference in the owners manual is to give you an indication of the limit you can apply to the towball in terms of weight. The overall towing limit does take into account the load you have inside the car as well, as it is all being towed by the same vehicle.

I'll be moving this thread to the towing section as I don't believe this limitation applies to diesels only.

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7/Jan/2010, 8:03 pm Link to this post Send Private Message MSN Blog
 
Robbo0001 Profile
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Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: Caution for T31 Diesel when towing


A scoop, for cooling purposes of the turbo and engine bay, wouldnt be that hard to install, and may indeed be beneficial.
I dont think it would have been, in Tonys instance though. As he said, the relative speed of the vehicle was practically zero, due to the tail wind.

That is a great read, and well reported by tony with all the facts. If I owned a T31 diesel, I would be looking into the options of modifying the heatshielding as he said, just in case.

cheers



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Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
8/Jan/2010, 7:13 am Link to this post Send Email PM   Send Private Message
 
NZExy Profile
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Date Registered: 03-2009
Location: Ch Ch NZ
TOTAL POSTS: 18
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Re: Caution for T31 Diesel when towing


quote:

jalalski wrote:

Tony,

The trailer weight reference in the owners manual is to give you an indication of the limit you can apply to the towball in terms of weight. The overall towing limit does take into account the load you have inside the car as well, as it is all being towed by the same vehicle.

I'll be moving this thread to the towing section as I don't believe this limitation applies to diesels only.




Hi Jalalski

The towing weight here in NZ is the max weight you can place on the towbar. There is also a max download of 150 kg .
This weight capacity is over an above the max load of the vehicle, which in my case is 2170kg.
This effectively gives us a combination weight of 3520kg

It may de different across the ditch, but thats how it rolls in NZ according to Nissan.

I should also add that I had a Territory previously and the Exey tows the same boat much more nicely and much more economically, averaging 10.2 litres per 100kms on the last trip.

Cheers
Tony


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2012 T31 Ti
9/Jan/2010, 5:57 am Link to this post Send Email PM   Send Private Message
 
dronus Profile
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Caution for T31 Diesel when towing


Supercheap have scoops in their current catalogue - have a look at page 14

http://www.supercheapauto.com.au/catalogue-au.aspx

I dont think ill be cutting any holes in my bonnet anytime soon though emoticon

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Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
X-966
9/Jan/2010, 9:34 am Link to this post Send Email PM   Send Private Message MSN
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Caution for T31 Diesel when towing


It won't be long before a carbon fibre bonnet with a scoop is designed for the diesel T31 am sure. This way you won't have to cut anything emoticon

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9/Jan/2010, 10:09 am Link to this post Send Private Message MSN Blog
 
craig90 Profile
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Date Registered: 12-2009
Location: Brisbane
TOTAL POSTS: 90
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Re: Caution for T31 Diesel when towing


Now that would look rather nice Carbon fibre emoticon Imagine the price emoticon

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X-1467 08 T31 TL Auto Platinum: Tinted Bonnet Protector, Tinted Windows, Fitted Seat Covers F&R, Rubber mats, Phone kit, Luggage Carpet, Weather Shields, Dash Mat, Tow bar, K&N filter, Twin screen DVD Player (the new Kingswood)
9/Jan/2010, 5:10 pm Link to this post Send Email PM   Send Private Message
 


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