Isuzu DPF issues again

[Drillman]

They all design and build their chassis to fail. Hopeless paint. Rust traps. Holes specifically placed to allow the ingress of salty road water to ensure that the chassis also rusts from the inside out. It would actually cost them less to build by not stamping holes in the outer walls and it wouldn't cost much to dip the whole chassis in zinc based primer before coating in a better grade of topcoat.
Not one brand builds what I would class as 'a quality product'. The may or may not be reliable for a good few years and may drive nicely and the panel gaps are small and even, but they specifically avoid building quality products in the way I measure major aspects of quality. If its not built to last long term, it is not a quality product.

Waxoyl is pretty hopeless stuff but better than nothing on a new chassis. It won't do anything worthwhile on a chassis that has already started to get rusty. I have always Waxoyled new vehicle chassis in the first couple of days after delivery. Done it since late 1972 when I removed the wheels of the new MF165 and pained underneath the mudguards to protect them.
A couple of weeks ago I power washed the chassis of the Ranger and, after it had dried, sprayed oil and diesel mix over it. Not EP90, which I once used on the Land Cruiser which literally caused a stink for a year afterwards. The oil and diesel mix keeps the previous Waxoyl soft and active. Not much Waxoyl left of the original in the visible wheel arch area which is power washed now and again, which isn't a surprise when considering that the Ranger is now seven years old.
I've rubber plugs and plastic stop-ends blocking all the visible holes in the outer chassis walls in the wheel arch areas, so that if they had sprayed any paint inside the chassis box sections it would remain clean, dry and rust free inside. Holes in less vulnerable areas and the inner chassis walls are left open to provide ventilation.

Yes sadly your right. although I’m hoping I don’t have to keep the Ranger long enough for serious corrosion to become an issue.

Still would like to keep the chassis something like though regardless.

 

[reboot]

I bought my truck in April and it was regening about 100miles which I considered normal. It went to 70miles then 50 and has been as low as 30.
The seller I bought the car had changed the engine oil and filled to the maximum mark so I had to drain and fill again to the minimum mark (advice from crawfords isuzu dealer)

Crawfords Charing is my local dealer and I deal with their agricultural side through work regularly so they kindly run diagnostics for me on a few occasions and reset my oil dilution rate for me to see if that helped.
I emailed isuzu and I was disappointed by their primary response, to me it seemed like it was my fault (I hadn’t had the truck long) and I was not caring for the truck properly.
Iv learnt a lot through this process and after having 2 injectors replaced my miles regen has been slowly improving I’m now up to around 90 miles. The truck also seems to be running smoother. I’m considering using a dpf cleaner occasionally to help things along. Also

Some things Iv learnt
When changing engine oil only fill to minimum mark to allow for extra oil added during regen which can seep through to the sump. Make sure you specifically request this if you use an independent garage.
Check oil level regularly and make sure it has an oil change when it gets to the x mark.
Oil dilution can only be reset by isuzu dealer but it’s very important.
If the oil level is rising noticeably fast get the Isuzu dealer to check the tolerances. If left this can block the dpf.
I was advised to keep the truck revs low and the gear high. It’s a good engine with a low torque band so 70mph in 6th uphill is not a problem and has helped with fuel economy.

I know main dealers aren’t the cheapest but if you pay peanuts you get monkeys. Also the way isuzu have set up diagnostics and third parties it’s really the most affective route to go to the dealer.

I owe Nick and his team at crawfords Charing my thanks, they have been extremely helpful and supportive and I would happily use them again in the future.

 

[Cowabunga]

I bought my truck in April and it was regening about 100miles which I considered normal. It went to 70miles then 50 and has been as low as 30.
The seller I bought the car had changed the engine oil and filled to the maximum mark so I had to drain and fill again to the minimum mark (advice from crawfords isuzu dealer)

Crawfords Charing is my local dealer and I deal with their agricultural side through work regularly so they kindly run diagnostics for me on a few occasions and reset my oil dilution rate for me to see if that helped.
I emailed isuzu and I was disappointed by their primary response, to me it seemed like it was my fault (I hadn’t had the truck long) and I was not caring for the truck properly.
Iv learnt a lot through this process and after having 2 injectors replaced my miles regen has been slowly improving I’m now up to around 90 miles. The truck also seems to be running smoother. I’m considering using a dpf cleaner occasionally to help things along. Also

Some things Iv learnt
When changing engine oil only fill to minimum mark to allow for extra oil added during regen which can seep through to the sump. Make sure you specifically request this if you use an independent garage.
Check oil level regularly and make sure it has an oil change when it gets to the x mark.
Oil dilution can only be reset by isuzu dealer but it’s very important.
If the oil level is rising noticeably fast get the Isuzu dealer to check the tolerances. If left this can block the dpf.
I was advised to keep the truck revs low and the gear high. It’s a good engine with a low torque band so 70mph in 6th uphill is not a problem and has helped with fuel economy.

I know main dealers aren’t the cheapest but if you pay peanuts you get monkeys. Also the way isuzu have set up diagnostics and third parties it’s really the most affective route to go to the dealer.

I owe Nick and his team at crawfords Charing my thanks, they have been extremely helpful and supportive and I would happily use them again in the future.

To summarise, avoid these vehicles like the plague.