Leaky MAF

Discuss the RB20, RB25 and RB26 series engines.
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rb240det
Posts: 261
Joined: Tue Apr 19, 2005 8:12 am
Car: 1991 240sx Hatchback and 1994 300zx

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Got a slight problem. Finally got the car on the road after a bad ignitor chip and a boost leak or two (one of those being my MAF). Fixed those and the car was running great. Unfortunately the High-temp RTV silicone I used to seal my leaky MAF didn't hold up against the boost and developed a tiny leak again. Sooo I re-sealed it again, throwing epoxy on top of the sealant and let it cure for a day or two. That worked for oh about another day and the epoxy became uber-brittle and developed ANOTHER leak. So does anyone have any suggestions on what I should use? I would appreciate any help!


Joe
Posts: 6511
Joined: Sun Feb 09, 2003 8:29 pm
Location: Phoenix, AZ

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pictures and more details would be nice

im assuming you went to a blow through setup.

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rb240det
Posts: 261
Joined: Tue Apr 19, 2005 8:12 am
Car: 1991 240sx Hatchback and 1994 300zx

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Kamin wrote:pictures and more details would be nice

im assuming you went to a blow through setup.
Oops...sorry about that. Yeah I'm running a blow-through on my RB20DET using a Z32 MAF. My digital camera is back home so unfortunately pics will have to wait. It's leaking on the corner of the square plastic "cap" on the top of the MAF. The MAF is located right before the last bend on the intercooler piping leading to the factory pipe that runs over the top of the motor. Like I said...it worked great for a day or so, then developed another leak from the pressure.

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300Plus
Posts: 700
Joined: Sat Jul 09, 2005 8:11 pm
Car: 1995 S14 w/ Rb25det Series II

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I just bought a liquid epoxy mad for metal and hard plastics that I plan on using to seal the adapter to the maf and to seal the electronics on the top. the stuff I bought says it'll hold like 3400psi of pressure or something like that, I got it from discount auto parts off the shelf, its a 2 part in a syringe. what did epoxy did you use? what psi are you running?

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Shocker
Posts: 2082
Joined: Sun Aug 01, 2004 2:40 pm
Car: 89 240sxHB rb26/30

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3400 psi.. o.O thats like more than concrete....


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