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Intake Leak, Need Advice.

Daboss

By Daboss,
in Engines & Forced Induction

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Daboss Experienced

Daboss

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Hey there forum installed a greddy copy plenum on my r33 gts-t. Installation went ok now only prob is when I started I have an intake leak. Know this because car idles horrible and cuts off after awhile without using throttle if throttle is opened it will stay on, also when free reving the boost gauge reads negative pressure and reads zero when idle. It's reversed because at idle it suppose to read negative pressure and when free reving come to zero. Conducted a few test and finally found the intake leak, it is between the head and intake gasket found it because of seeing the spark that happens during combustion, yes actually seeing the fire it was that visible, it is a metal head gasket I am using and wanted to know if you guys think that placing some sealant between those areas gasket to runners will solve the air leak. There is no water leaking so the water jackets are straight as sealant was placed here, yes I know should have placed sealant around the runner section as well, but when you are working with stubborn people this is what happens. So would you suggest trying the sealant or just replace with stock manifold? I also have a new original intake gasket which I was thinking of placing between head and metal gasket. All opinions are welcome.

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**RB2530** Proficient

**RB2530**

Posted
Posted

This is often how unreliable engines start their life...by cutting corners during builds..How reliable do you want your engine to be??

Do things properly...

Check the intake manifold flange for accuracy and get it corrected by a machine shop if necessary...Use a genuine Nissan gasket (especially for exhaust manifold) and fit / tension the nuts / bolts as per the workshop manual tightening sequence...I apprecaite you are not fitting an RB25 manifold but the factory tightening sequence, I suspect, will be more appropriate than whatever you come up with...No offence intended here so don't take any...

Daboss Experienced

Daboss

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Posted
This is often how unreliable engines start their life...by cutting corners during builds..How reliable do you want your engine to be??

Do things properly...

Check the intake manifold flange for accuracy and get it corrected by a machine shop if necessary...Use a genuine Nissan gasket (especially for exhaust manifold) and fit / tension the nuts / bolts as per the workshop manual tightening sequence...I apprecaite you are not fitting an RB25 manifold but the factory tightening sequence, I suspect, will be more appropriate than whatever you come up with...No offence intended here so don't take any...

Nah no offence taken I asked the question to get the best advice for my situation. Thanks for your help and will do.

Get the face machined, cheap stuff is never true.

Use genuine gaskets and some sealant.

Thanks will do man.

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