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intake leak


Darkblade

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ok im in the process of a leakdown test and there is a bad leak on the part that the intake screws into it was drilled through like most banshees and it hold no pressure from the leak down test does will air leaks cause a drop in compression and how can i seal the hole to stop it from leaking

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I've always assembled gaskets using regular motor oil on all of the motors I've worked on, and that includes boosted Mitsu 4G63's!!

Never leaks, and super easy to remove.

 

But there is one caveat.

The surfaces have to be OEM.

If any sort of rotary scotch brite pad is used to remove a previous owners 1211 or RTV bullshit, the gasket sealing surfaces are fuckt and you will be forever using RTV or the like.

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i stopped using gaskets on the intakes about 2 years ago.  right after i started using leakdown tester a LOT...  i just straight import grey, mega grey, hondabond, yamabond, grey etc whatever you use..  

 

and naysayers,,  you just sealed the complete case together metal to metal..  why is this any different

 

 

its leaking into the threads from the inside of the intake  there is a tenny tiny bridge between the inside of the intake to the threaded area.  yours is probably cracked or some ported screwed it up.  i see it a lot on ported, or overly tightened cylinders or threads filled with rtv or some sort of sealer  

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