How do I diagnose a bad turbo?

[daniel_cogar]

on my mx6 when the turbo went it only smoked on a deceleration like down shifting or riding the gear.

[Advancedynamix]

Check the pcv. I had a b6t smoke like crazy on me and I thought it was a turbo issue but it was just a pcv valve.

Very true. Stock B6t check valves are crap. I used one from a mid 90's Honda iirc. Honda check valves are bulletproof. Also, worth noting, the B6t engines in other countries came with catch cans that auto drained into the back of the block. These engines are prone to oil blowing out the crank vent due to the oil squirters under the pistons ( this atomizes the oil as it splashes off the pistons) and the less than adequate oil separator in the valve cover. A small amount of blow by will push oil out. Make sure your catch can vents back to the intake. Mine auto drains back into the block.

[Damkid]

Check the pcv. I had a b6t smoke like crazy on me and I thought it was a turbo issue but it was just a pcv valve.

I put a brand new one on thinking the same thing, no change

on my mx6 when the turbo went it only smoked on a deceleration like down shifting or riding the gear.

Mine only smokes under acceleration, more so after a hard accel though

Very true. Stock B6t check valves are crap. I used one from a mid 90's Honda iirc. Honda check valves are bulletproof. Also, worth noting, the B6t engines in other countries came with catch cans that auto drained into the back of the block. These engines are prone to oil blowing out the crank vent due to the oil squirters under the pistons ( this atomizes the oil as it splashes off the pistons) and the less than adequate oil separator in the valve cover. A small amount of blow by will push oil out. Make sure your catch can vents back to the intake. Mine auto drains back into the block.

I'm curious to see your design for the catch can, do you have or can you take any pics?

[Advancedynamix]

I'll get some pics this weekend. I used parts of an air compressor dryer that I salvaged from the trash at work. Lol.

[HondaSlayer]

I had the same problem with my turbo. i would drive along and it would only smoke a little or not at all but if i got on it then let off without pushing in the clutch and then touched the gas again it would look like on of james bonds cars. I checked the turbo when it was still on the car and it only felt like a little play in it but when i got it off and took the compressor housing off it had worn into the housing and the seals were shot. Screwed my compressor fins up in the process too. so it is somthing to think about.

[KingFish]

Rotary.

:headbang:

[Damkid]

:lol: if I had the adapter plate made up, I would try a rotary, but I need to drive this car over the winter so no time for rotary

[Rocketman]

Very true. Stock B6t check valves are crap. I used one from a mid 90's Honda iirc. Honda check valves are bulletproof. Also, worth noting, the B6t engines in other countries came with catch cans that auto drained into the back of the block. These engines are prone to oil blowing out the crank vent due to the oil squirters under the pistons ( this atomizes the oil as it splashes off the pistons) and the less than adequate oil separator in the valve cover. A small amount of blow by will push oil out. Make sure your catch can vents back to the intake. Mine auto drains back into the block.

This is some good info, explains a lot of the quirks I've noticed about the B6T

[Advancedynamix]

So many poor rhb5 turbos blamed for oil consumption and rebuilt for no reason, lol. I am going to start a turbocharger rights campaign. I will fight for the equal and fair treatment of all power adders.:p

[Advancedynamix]

:lol: if I had the adapter plate made up, I would try a rotary, but I need to drive this car over the winter so no time for rotary

Not a good plan with the price of gas being what it is. Driving a rotary every day takes dedication (Okay, so the old first gen Rx7's with a properly tuned carb weren't too bad and the new renesis isn't as horrible, but everything rotary in between is disgustingly thirsty).

[Christ]

Not a good plan with the price of gas being what it is. Driving a rotary every day takes dedication (Okay, so the old first gen Rx7's with a properly tuned carb weren't too bad and the new renesis isn't as horrible, but everything rotary in between is disgustingly thirsty).

I love how the faces randomly show up in words like disgustingly LOL

[Damkid]

Not a good plan with the price of gas being what it is. Driving a rotary every day takes dedication (Okay, so the old first gen Rx7's with a properly tuned carb weren't too bad and the new renesis isn't as horrible, but everything rotary in between is disgustingly thirsty).

And how is a turbo KL any better lol

[Damkid]

Well the 323 is off the road today and I'll have plenty of time to diagnose/repair it

[RhodeStiva]

your seals

[Movin]

How much oil pressure is supposed to be supplied to the turbo?
If the pressure is too high can it push those kind of seals in and
dump oil into the air stream?