Turbo Rattle

[goosetrain123]

So I have a Rev B BH Legacy. Car has 239k.

I bought it really cheap with a blown motor. It had run a bearing really bad. I bought a replacement low mileage long block. Came without ancillaries and without a primary turbo. So we dropped it in with the old primary Turbo. From the blown engine. The turbo didn't seem to have any bearing play, but was full of oil. On both intake and exhaust sides of the turbo. The new engine ate a heap of oil when we first started it. But I quickly put new plugs in to help prevent damage.

The factory engine was an EJ208 being a manual, it now has an EJ206. So the compression is 9.0:1 but the ECU thinks 8.5:1. Don't think that has anything to do with it. But it's worth a mention.

It boosts fine, on both Turbos, it goes like a stabbed cat. But this primary turbo rattles at idle and when returning to idle. It's a really obnoxious rattle too. If I push on the wastegate lever thing. It changes pitch. I'll attach a video I took of it.

Any ideas would be greatly appreciated!

Cheers

[Rosssub]

Welcome to CS. If the primary turbo is ok and pressure on the WG actuator changes the noise. it could be the WG flapper button loose and vibrating only at certain RPM. Try grabbing the WG actuator arm and lifting it, to see if the WG is closed tight or sitting slightly open.

Or could be a missed turbo/up pipe mounting bolt that's rattling at certain RPM, there's a few easily missed bolts under the primary turbo.