Land Rover 300TDi turbocharger rebuild
Discussion
When the garage replaced the timing belt on my 300TDi a while ago I asked them to give the engine a quick check to see why it was more sluggish than my identical but higher-mileage vehicle. I was advised that there was a lot of play in the turbocharger bearing but it wasn't in imminent danger of failure. The intention was to fit a BAS VNT turbocharger when they became available - buy once, cry once.
The turbocharger had other ideas and decided to start making Canary noises at gear changes and a more scary noise at higher engine speeds.
I suspect it is telling me that it's time to book it's funeral.
The VNT turbochargers aren't readily available yet but I don't want to buy a replacement assembly so was thinking of rebuilding it with a new cartridge.
Is this a good idea?
It doesn't look too difficult (I've rebuilt engines before).
Any tips?
The turbocharger had other ideas and decided to start making Canary noises at gear changes and a more scary noise at higher engine speeds.
I suspect it is telling me that it's time to book it's funeral.
The VNT turbochargers aren't readily available yet but I don't want to buy a replacement assembly so was thinking of rebuilding it with a new cartridge.
Is this a good idea?
It doesn't look too difficult (I've rebuilt engines before).
Any tips?
This might be a viable replacement:
https://www.turborebuild.co.uk/webshop/prod_548194...
- certainly a good turbocharger will make the engine perform better than the present worn one. The attraction here is I am buying from the assembler/manufacturer of most of the parts, claimed extra performance is a bonus.
https://www.turborebuild.co.uk/webshop/prod_548194...
- certainly a good turbocharger will make the engine perform better than the present worn one. The attraction here is I am buying from the assembler/manufacturer of most of the parts, claimed extra performance is a bonus.
Not a lot of responses to this query so I decided I'd go ahead anyway.
I ordered an improved turbocharger CRHA and it arrived well-packaged three days later.
The biggest obstacles to it being a straightforward job were the lack of a suitably large internal circlip pliers and one of the clamp bots shearing off in the exhaust manifiold. The former I solved with ingenuity and the latter I drilled and re-tapped.
The job took just over a day to do but four hours of that was spent fixing things and removing / refitting the circlip.
I ordered an improved turbocharger CRHA and it arrived well-packaged three days later.
The biggest obstacles to it being a straightforward job were the lack of a suitably large internal circlip pliers and one of the clamp bots shearing off in the exhaust manifiold. The former I solved with ingenuity and the latter I drilled and re-tapped.
The job took just over a day to do but four hours of that was spent fixing things and removing / refitting the circlip.
Scrump said:
Is the performance improved? Better than your other Land Rover?
Probably about the same now, although the wastegate is still chirruping so I need to check the boost pressure. Could be there are/were two factors at play - a worn-out turbocharger and the wastegate relieving boost pressure too early.hidetheelephants said:
Any pics? Mine isn't making alarming noises but I dare say it will get there eventually.
I'll post some on Tuesday.Test run on the motorway this evening, definitely still down on torque on longer/steeper climbs when compared with the other 110". Revs nicely but appears a grey smoke haze at full accelerator around 65mph in fifth.
Suspect that the wastegate is bleeding boost which is causing the poor climbing performance, surely the catalytic converter can't be that restrictive? Economy is on a par with the other 110" which again points to poorer efficiency.
Fitted a boost pressure gauge, peak is uncalibrated 0.85 Bar.
I rotated the boost compensating diaphragm / pin so the fuelling regulator runs on the part of the cone with the greatest offset (it was on 1/2 way position). Obviously it goes better but with puff of black smoke between gears as the turby winds up and a black haze at full load. Think I'll put it back where it was and try winding the boost up next.
Need a rolling road!
I rotated the boost compensating diaphragm / pin so the fuelling regulator runs on the part of the cone with the greatest offset (it was on 1/2 way position). Obviously it goes better but with puff of black smoke between gears as the turby winds up and a black haze at full load. Think I'll put it back where it was and try winding the boost up next.
Need a rolling road!
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