Rb25det Turbo On Rb20det

[tiesto]

hi guys

i recently put a rb25det turbo on my rb20det motor

i fired it up and it idles fine, temps fine etc but when i give it a slight rev it makes a loud screeching noise coming directly from the turbo and at higher revs it's even louder

im not impressed i spent 2 and half days putting it on and its come to this, could it be a lack of oil to the turbo or so? i had it running for a good 10 minutes and temp was half way as per normal driving..

does neone know what the problem is?

[HR31_RB20DET]

Sounds like the bearings are gone in the turbo and the compressor wheel is grinding on the housing. Take the front pipe off and check the shaft for play, push down on it and try and spin the comp wheel and see if it's hitting on the housing.

Happen to my standard turbo, would be fine just cruising, but once it started making boost, it sounded like a cop siren.

[tiesto]

yes there is minimal shaft play and when you turn it it grinds against the housing is it? like when i turn my rb20det turbo is spins freely but when i turn this one you can hear a small grinding sound..

oh well looks like its time to replace it again