Guys, I have a plan which involves a using a Turbo which i am about to acquire origin/condition unknown, is there anyway of telling if the Turbo is
knackered by a visual inspection/what do I need to look for?
Thanks in advance
Play in the shaft primarily, and oil residue in the ports. The truth will come whn you run it.
A lot of turbos also can have cracked exhaust housings (look particularly between the internal wastegate port and the exhaust port), although these
will often quite happily run for 50k like that - depends on the price whether it's worth it or not.
As mentioned, play in shaft - in/out as well as side to side. Expect a tiny bit with no oil pressure but anything more and it's worth doing a
rebuild. These cost about £40-50 unless you've got some super fancy turbo.
When you eventually fit it and run the engine, if it's pumping out blue smoke when on boost, it needs a rebuild. If it's not boosting much
at all, then check your pipework for leaks, and if it traces back to the turbo, chances are it's pretty knackered (but you should be able to tell
this visually as there will be obvious damage to the turbines)
As above; NO palpable play in any direction on the compressor shaft AND it needs have a Water as well as oil feed.
Non watercooled turbos are worthless .
Another question, on a turbo with an internal wastegate can you do away with/bypass it and use an external one?
yes you can weld up the wastegate and fit an external one onto the manifold, pre turbo
sort of like this link
although there prone to crack and break the weld due to the heat from what people have said, im going to fit a bracket to hold the wastegate shut phycicaly on mine so it can be run on a internal wastegate too if i sold it.
Can i not remove the actuator and replace that with a solid bar to hold it shut?
quote:
Originally posted by Bare
As above; NO palpable play in any direction on the compressor shaft AND it needs have a Water as well as oil feed.