86_VG30ET_Z31

I have a very bad exhaust leak on the passengers side manifold would that prevent me from building bOost.

tonsoffun300zx

is it before or after the turbo because if it's before then yes but if it's after it shoudln't other than the disruption of air flow and back pressure and such.

86_VG30ET_Z31

Its right side manifold where it connects to the engine the gasket is worn its a really bad leak an yes its before the turbo would a leak prevent from buildin any boost cause my aftermarket boost gauge wont go
Over zero an it has no leaks on the intercooler system just replace the wastegate actuator the turbo has zeso shaft play an all the vaccum lines are brand new also the maf sensor is new an i still can produce boost it feels so slow

tonsoffun300zx

are you at stock boost levels? because there is a certin amount of boost loss and what kind of I/C are you running FMIC or SMIC?

86_VG30ET_Z31

I have a fmic with a 2.5 piping an i have stock boost for right now i had a ebc set to 12 psi an still the same problem

tonsoffun300zx

change out the gasket that should be the problem remember the turbo runs off of exhaust gasses and if the exhaust leaks then it may not be boosting properly. have you ever checked out the wastegate on the turbo before it releases exhaust from the turbo to slow the turbine down thus not allowing boost to build past a certain point and thats what seems is happening to you right now. change the gasket and then report back.

omniserv

That sounds right to me too, you are venting gases, esp when the RPM's under load get up there.

Good luck getting the manifold off there on the side of the motor. Just keep in mind if you know what you are going you can pull the engine with the transmission in a few hours. Plus if you do that you can fix or replace anything that needs to be done. Also in most cases it's recommended to change both gaskets at the same time.

If just one stud breaks even if it's the last one while re-torquing it you are going to wish you'd just pulled it.

86_VG30ET_Z31

Thanks for all the advices ima do it on the weekend cause to busy with work but ill let you guys knoe if that fixes my problem

tonsoffun300zx

alright and pix to

hoov100

Be sure to use the multilayer aluminum gaskets they sell, you won't have an exhaust leak again!

86_VG30ET_Z31

Where can i get
The multilayer aluminum gasket at also wat is the torque specs for the exhaust manifold bolts the car is a 86 turbo

omniserv

You can download a FSM and/or Haynes here. the specs are in it.

http://www.xenonz31.com/reference.html

hoov100

Autozone, pepboys..etc The torque specs are tight enough so it seals, but not tight enough that the stud breaks.

86_VG30ET_Z31

I finally got to replace the exhaust manifold gaaket to fix the leak an it fix the boost problem now im boostin stock boost ima try to install my EBC on these day to boost it to 12 psi