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SilS13Coupe
11-01-2009, 05:20 PM
My friends RB20 has a boost leak, he turned up the boost to about 18psi and then the manifold came loose.

Can anyone help with the problem? Where would be the couple of places to check?

Thanks
kushlivin
11-01-2009, 05:41 PM
the manifold maybe. intercooler piping/mount.bov,etc,etc...
SilS13Coupe
11-01-2009, 05:52 PM
the manifold maybe. intercooler piping/mount.bov,etc,etc...

Yeah, pain in the ass to check every single place. He says the boost gauge will read its boosting, but its not boosting at all.
Sileighty_85
11-01-2009, 05:56 PM
My friends RB20 has a boost leak, he turned up the boost to about 18psi and then the manifold came loose.

Can anyone help with the problem? Where would be the couple of places to check?

Thanks


I dont understand your question/ Problem... Which manifold? intake or exhaust????

so the manifold came loose cuz of boost causing a boost leak?

Maybe you should tighten the manifold back down..... sounds crazy but that just might fix your manifold
SilS13Coupe
11-01-2009, 06:02 PM
I dont understand your question/ Problem... Which manifold? intake or exhaust????

so the manifold came loose cuz of boost causing a boost leak?

Maybe you should tighten the manifold back down..... sounds crazy but that just might fix your manifold

He says exhaust mani came loose and when he bolt it back on it wouldnt boost anymore.
Sileighty_85
11-01-2009, 06:14 PM
He says exhaust mani came loose and when he bolt it back on it wouldnt boost anymore.

what turbo is he running?

Im gonna ROTFL if you say stock.... please say stock
SilS13Coupe
11-01-2009, 06:18 PM
what turbo is he running?

Im gonna ROTFL if you say stock.... please say stock


Lol yup stock turbo. I guess we solved the issue? A new turbo is in need?
Sileighty_85
11-01-2009, 06:25 PM
Lol yup stock turbo. I guess we solved the issue? A new turbo is in need?

BINGO!!!

The Stock turbo exhaust wheel is ceramic so anything over basically 12psi (some say 10 some sy 14) with destroy the exhaust wheel= No Boost

Tell your buddy hes a dumbass
kushlivin
11-01-2009, 06:31 PM
BINGO!!!

The Stock turbo exhaust wheel is ceramic so anything over basically 12psi (some say 10 some sy 14) with destroy the exhaust wheel= No Boost

Tell your buddy hes a dumbass
thats too fu*king funny:wiggle:^^
SilS13Coupe
11-01-2009, 06:33 PM
BINGO!!!

The Stock turbo exhaust wheel is ceramic so anything over basically 12psi (some say 10 some sy 14) with destroy the exhaust wheel= No Boost

Tell your buddy hes a dumbass

hahaha, well hes selling it because he doesnt know whats going on.

Maybe i should pick it up and just replace the turbo.
Sileighty_85
11-01-2009, 06:38 PM
hahaha, well hes selling it because he doesnt know whats going on.

Maybe i should pick it up and just replace the turbo.

lol maybe...

FYI same goes for the RB25 Turbo too.
SilS13Coupe
11-01-2009, 06:41 PM
lol maybe...

FYI same goes for the RB25 Turbo too.

So most likely, just replacing the turbo will be ok right. If that is the case, i'll definitely pick it up. Hes selling it for cheap.

What kind of turbos are on the RB's?
Unique
11-01-2009, 06:43 PM
I remember one of my boys having a similiar problem, his brake booster took a crap which caused a vaccum leak which caused the car to run lean and not letting the car boost regularly.
Sileighty_85
11-01-2009, 06:54 PM
So most likely, just replacing the turbo will be ok right. If that is the case, i'll definitely pick it up. Hes selling it for cheap.

What kind of turbos are on the RB's?


Not sure on the turbo's Numbers but they can be compared to the SR's turbos
RB20=T25
RB25=T28

RB20 Right RB25 Left
http://i73.photobucket.com/albums/i235/Neil_85/Miyukis%20Silvia/DSCN2137.jpg

http://i73.photobucket.com/albums/i235/Neil_85/Miyukis%20Silvia/DSCN2141.jpg
SilS13Coupe
11-01-2009, 06:58 PM
Not sure on the turbo's Numbers but they can be compared to the SR's turbos
RB20=T25
RB25=T28

RB20 Right RB25 Left
http://i73.photobucket.com/albums/i235/Neil_85/Miyukis%20Silvia/DSCN2137.jpg

http://i73.photobucket.com/albums/i235/Neil_85/Miyukis%20Silvia/DSCN2141.jpg


Thanks alot! But before i pick it up, i just want to make sure that IS the problem..
Sileighty_85
11-01-2009, 07:02 PM
Thanks alot! But before i pick it up, i just want to make sure that IS the problem..

right the problem will be oblivious due to no exhaust wheel/broken fins

i can pretty much gaurentee you thats the problem
Yellow4g63
11-01-2009, 07:16 PM
If he turned it to 18psi on the stock turbo how much u want to bet he has a stock pump in it too. Could have hurt the motor or head gasket too.
SilS13Coupe
11-01-2009, 07:18 PM
well he said that the car starts up fine, no smoke or anything. And he said you can still hear the turbo wheels spinning.
Sileighty_85
11-01-2009, 07:24 PM
well he said that the car starts up fine, no smoke or anything. And he said you can still hear the turbo wheels spinning.


Thats just the Ball bearing CHRA, the wheel is destroyed so it wont build boost at all cuz it cannot spin fast enough.

Like Yellow said check that pump
SilS13Coupe
11-02-2009, 12:05 PM
Thats just the Ball bearing CHRA, the wheel is destroyed so it wont build boost at all cuz it cannot spin fast enough.

Like Yellow said check that pump

Would i just need to the replace the turbo itself? I want to pick it up, but i dont wanna risk buying it, replacing the turbo and find out the motor is gone.

It if doesnt blow any smokes, the gasket should be ok and the motor should be ok too right?
Sileighty_85
11-02-2009, 04:06 PM
Would i just need to the replace the turbo itself? I want to pick it up, but i dont wanna risk buying it, replacing the turbo and find out the motor is gone.

It if doesnt blow any smokes, the gasket should be ok and the motor should be ok too right?


cant really say for certian that is the only problem but i would check the turbo first.

If he still has a cat (doubtful) pull the cat and look for little ceramic pieces
SilS13Coupe
11-03-2009, 11:06 PM
It has cutouts.