After having my van diagnosed as having a turbo
problem ( low boost due to seal failure ) ,a permenant fault with EGR
Valve and Renault wanting £1600 to change just the turbo
.I decided to have a go myself .
This post is to try and help others who may feel the same way .
Please note this is not a definitive guide and if you use this advise and wreck your engine/car it`s not my fault .If you have any doubts to your ability seek professional help .
Ok first thing I did was to source a new turbo
.I managed by using various contortions to read the information stamped on the plate on the turbo
and set about searching the net for a replacement .I finally managed to source a new one from Turboactive http://www.turboactive.com/
Cost was a reasonable £462 for a brand new unit with the old unit being returned to them at their cost .
I also tried to source a new EGR
Valve and oil
feed and drain pipes from non Renault suppliers but with great difficulty so ended up spending £227 with renault parts for a new EGR
filter , CAT/Turbo
Gasket ,and turbo
I set aside 3 days to do the work .
First thing was to drain the oil
and replace the filter then while the oil
was draining I decided to check access to the turbo
and being a van it`s at the rear of the engine bay with very limited access from above and virtually none from below .I decided the best course of action was to remove the bonnet, bumper ,grille and front panel to gain better access .
Bonnet off first next the intercooler pipes ,the air filter,intercooler and then I decided to remove the heater blower motor which is mounted in the top of the engine bay see pic below ,fairly straightforward apart from a hidden bolt on the left front .
Then I set about removing the front grille and lights and finally the front panel ,after lots of swearing and bruised knuckles ( bear in mind there is no manual as such for this vehicle )
I arrived at this ,
is behind the engine below the silver heatshield visible in the picture above .
So now to the turbo
,I sprayed wd 40 on all the fittings for the turbo
while I worked out the best way to remove it .
Firstly off with oil
feed pipe ,fairly easy .I plugged the hole on the engine side of the feed pipe to prevent any dirt or debris entering and also did the same to the turbo
end. Then off with the vacum pipe to the wastegate valve .Next I decided to remove the CAT from the turbo
again fairly easy ,the bottom two nuts being a little awkward .The next best thing is to remove the lower left hand bracket that holds the CAT to the block .This is awkward ,there is a simple 10mm nut on the CAT side ,however the fixing to the engine block is a torx type and access is difficult .I found after trial and error that moving the bracket up and down helped to release the torx bolt which was solid
A further 2 bolts on the right rear bracket of the CAT were removed enabling the CAT to be moved to the left out of the way .
The pic below shows the old turbo
in situ ,the Cat feed pipe can be seen to the left and the awkward bracket is below here ,you will notice I have plugged the oil
feed hole to the old turbo
,not really necessary but good practice .
Three nuts hold the turbo
in place ,the two visible in the picture above ( bottom center) and one underneath on the manifold side of the engine ,again a little awkward to get to .So now the turbo
is free ,however the oil
drain pipe is still in place ,now as this is a push fit into the block I gently eased the turbo
upwards which pulled the drain pipe out .
So time for the new turbo
,refitting is ,in the words of so many manuals ,a reverse of the above procedure .
HOWEVER OBSERVE THE POINTS BELOW
Use a new gasket for the turbo
/Cat connection also note there is no gasket for the turbo
drain pipe needs to be pushed into the block first and then the turbo
fitted .DONT be tempted to bolt the drain pipe to the turbo
and then push it in as you fit the turbo
it doesn`t seat properly in the hole and will leak .The drain pipe has 2 o rings that seal it into the block and needs to be eased in using a twisting action ,impossible with the turbo
fitted .I found this out the hard way and had to take the turbo
out again to do it properly after oil
poured out .It is however a nightmare to get to the drain feed pipes`bolts in ,persevere though and you will do it ,tip an inspection mirror is very useful to get them in and a knuckle joint socket extension is required to tighten the rear nut .
Another good idea is to bolt the turbo
in looseley first and attach the oil
feed pipe and tighten by hand ,next place a container under the turbo
drain hole.Now refill the engine with oil
,I used 5 w40 fully synthetic diesel ,if you haven`t already done so and leave at least 15 mins .Disconnect the plug from the pressure regulator on the high pressure pump to stop the engine starting .Crank the engine a few times and make sure oil
comes out from the drain hole on the turbo
( it will flow very quickly so be aware ) .This just ensures the turbo oil
feed is not blocked
Pic below shows the new turbo
After everything was bolted up I once again cranked the engine a few times just to be sure all was ok and no oil
While the front was off I decided to do the EGR
Valve as well ,on the trafic van it`s mounted at the front as indicated by the arrow in the pic below .
Removal is fairly straightforward just 3 bolts and it can be eased out using a twisting motion .
Something overlooked by so many when the EGR
Valve is out is cleaning the manifold where it fits , mine was quite dirty so I set to work with some carbcleaner and rags
Next I fitted the new valve with a new gasket ,shown below is the 2 units new and old .The old unit had been cleaned less than a week ago by Renault .
The last thing I did before rebuilding was to spend some time cleaning and inspecting all the hoses and cleaning the intercooler .I used carbcleaner on the hoses and paraffin on the intercooler .
After I had everything together I restarted the engine and left it to idle for a good 10 mins ,while I checked for oil
leaks .I rechecked the oil
level and went for a test drive .
Imagine how happy I felt as I REALISED IT WAS NO DIFFERENT
It stilll wouldn`t pull from low down . I have made a seperate post about this though .
There were some very awkward moments doing this ,but on the whole it was fairly straightforward if somewhat lengthy .I would suspect I could do it in a day now after having done it once and knowing the pitfalls .
If any techs would like to add any useful information or anything they feel important I have missed I`m sure we would all appreciate it and I`ll edit my post accordingly .
If anyone has any questions I will also do my best to help
I just hope this helps a few people who may feel like going the DIY route.