oldskool
Well-Known Member
You not wrong there modern diesles are a propper pain in the arse, we've found that glow plugs are becoming a service item
and theye are a pain to replace on a lot of modern doosles.
Spunka
New Member
I took a DPF off a 06 insignia last week and steamed it out.
The amount of **** that came out was loads, there's no way you could burn that off, if you did get it clear it would cloge up again,
Any way this week we are takeing it off choping the **** out of it ,welding it back up and having a ECU remap
The amount of **** that came out was loads, there's no way you could burn that off, if you did get it clear it would cloge up again,
Any way this week we are takeing it off choping the **** out of it ,welding it back up and having a ECU remap
LRD90tdi
New Member
Ceramics don't retain heat (or posh brake discs would be a bit of a con!) and a cat/dpf cannot possibly gain a higher temp than that of the heat source.
Ceramics are used as they corrode less than steel, and can withstand much higher temps.
Tom
Why do they use ceramics as cook tops surface on high price cookers, and BBQ's
LRD90tdi
New Member
"Ceramics are used as they corrode less than steel, and can withstand much higher temps."
As they don't corrode like steel it helps cleaning and improves hygiene.
Tom
and takes less input to cook. that is why ceramic
is in the dust canister they get hotter to burn the soot and don't rust out
LRD90tdi
New Member
and takes less input to cook. that is why ceramic
We're getting side-tracked.
Copper, and other such metals conduct heat better, but aren't necessarily suitable for either situation.
As I said, I believe the main reason ceramics are used in dpf's is because they can withstand such high temps and resist corrosion.
Tom
totally agree
owl
Well-Known Member
You can't just remove the DPF because the engine ecu looks for a pressure drop over the DPF. They are very expensive from a Land Rover dealer last one I fitted to a sport was £2k (customer had the DPF cut open and the internals removed but then couldn't get the MIL light off) also Land Rover say that the target life of a DPF is 100K mls
Glow plugs are very difficult to get out of TDV6 motors, it's 50/50 whether they snap off.
As for reliability lot of problems stem from the very low sulphur levels in modern diesel fuel. Pumps and injectors rely on the fuel for lubrication and reducing the sulphur content reduces the lube properties. I saw a test of fuel additives by a German pump manufacturer and they concluded that they were next to useless apart from two stroke oil which restored the lubrication and also made the engine run cleaner plus 3-5% more efficient.
Glow plugs are very difficult to get out of TDV6 motors, it's 50/50 whether they snap off.
As for reliability lot of problems stem from the very low sulphur levels in modern diesel fuel. Pumps and injectors rely on the fuel for lubrication and reducing the sulphur content reduces the lube properties. I saw a test of fuel additives by a German pump manufacturer and they concluded that they were next to useless apart from two stroke oil which restored the lubrication and also made the engine run cleaner plus 3-5% more efficient.
DiscoPol
Well-Known Member
Have a google about on the subject it is well covered on just about all the diesel based forums, a lot of people swear by it
How would you know if your car has a DPF fitted. I have read that all 2010 onwards cars have them as standard but mine is a 2008 RRS when they were fitted as an option to UK cars. Any DPF gurus out there?
i personanlly havent seen them fitted as a option on the early sports they where fitted on the early 2011 sports and discovery 4s onwards they also take low ash oil now cheers mike
Jongould
New Member
Ok, let me re-word that, the catalyst works at a higher temp then the rest of the exhaust system, it gets this temperature gain from being close to the combustion chamber coupled with the burning of excess fuel that occurs in the cat. which allows it to burn of excess hydrocarbons, the use of ceramic is because it doesn't conduct the heat (which would make it effectively a heat sink and doing the opposite to what its meant to do) but keeps the heat within the catalyst chamber.
