Scania v8 730hp

Well the question is what related to bad maintenance and what real breaking down on the 12 and 13 liter engines?
A friend of my dos all the maintenance for a trucking company having over 50 trucks running heavy load and using the 6 line in 440 and 480 configuration form PDE up to the new XPI.
Next to this job he also work for a Scania dealer so he can compare his own fleet to that of regular customers

On the VGT turbo parts he discovered that truck running heavy cargo and returning back empty from a job are the ones that will have the problems with having the VGT getting stuck.
Also the early XPI models could have a problem with the secondary EGR cooler on top of the intercooler being full of water due to condensation blowing the headgasket or cylinder 5 and 6 when opening the secondary EGR valve.
Some commonrail fuelpumps had bearing problems and some ceramic part in the pump coming lose. Looks to me non of this is service related.

HPI also used by Cummins. Well on this part maintenance is key in preventing problems and setting the injector on OBC with a torquedial. Also changing lub oil in time will help a lot.
Fuel lift pump is a weak link. The 440 and 480 dos good fuel economy after a ECU remap, best so far.

CD12 engines same story as the HPI on service also I find the camshaft on some series to be a weak part.

And yes the V8 16 liter hardly no problems but question is this be course the relative low engine load compared to the 6 line? We had some in with injector puss rods worn out and some crack in the flywheel housing having a load of fun replacing them but yes it by far the best engine. We also had them running as generator engines shutting down 4 cylinders under 30kW load saving fuel like the best but making a horrible V8 sound if you don’t know this option.

 

Scania makes some good engines. I've got some snowcats that have a DS9, 9 Liter intercooled and turbocharged straight 6 diesel. 325HP. Very reliable, starts to -35C with a few shots of ether. 180L or 200L (can't remember) good for 12 hours. Have a centrifugal oil filter, first experience with these and they seem to work great.

Scania truck at start of thread looks slick.

 

Usually they make a brilliant engine, they really do last and are pretty trouble free, they are one of the better engines out there today but in recent years they have made a couple of dogs, first the 470 turbocompound which was over complicated and the turbine bearings were prone to failure if not maintained and ive heard of the bearings going into the engine causing it to blow, the second is the 13l 480, another over complicated engine, these are giving plenty of trouble and some failures, the rest of them are still fine, just stay clear of those two

 

13liter with PDE injectors ,simple turbo,and SCR is a good engine too,its strange why it take it so long to offer this engine in such configuration since its introduction in 2007, it would saved them alot of warranty money

 

Yup the engine itself is fine it's all the ####e attached to the pair of dogs that causes all the problems, I never even considered buying a turbocompound cos you could see future problems from the outset, part of the reason the v8 is such a good engine is because it's simple, that's how they should be kept

 

730 is now one of the worst engines Scania ever made. No power, high fuel consumption, SCR problems etc. 730 gets always beaten by old 620. New 2 pedal Opticruise is also a joke, like every robot box out there.

Buy 13 liter XPI , delete the EGR and you have a good engine without any emission crap, no urea, no DPF and VGT turbo lives long when there's no soot circulating inside the engine.

 

Is there anyone around here that has succeeded to tune the early 13l (2010). The guys in Kokkola has tried a few times but never really had any luck. Or do you have to go Denmark and put it on the dyno for real engine tune, an 12l we have has been there, pushing out a bit over 560hp.

From what I have heard the 620 is pushing out close to 700hp and 3500nm.
Wasn't it in Norway that 30% of all 730 has had power loss problems, some software issue and injectors stuck open.

 

I can't speak from experience here but a company 5kms from my house called Tierney international run a load of 620's and 3 730's, they do heavy fridge work to Italy which is very mountainous and both drivers and John Tierney say the 730 is very light on fuel and there's no comparison on power, the 730 will eat the 620, I drive a 620 and I'm very happy with it, it's causing no problems at all