LS3 MAP Bolt/Screw Size
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Joined: Jul 2010
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From: Dallas, TX
LS3 MAP Bolt/Screw Size On an LS3 intake, what is the size of the bolt or screw that holds the MAP sensor in place?
I bought a take-off LS3 intake assembly from a speed shop and it did not come with the MAP or the bolt.
I bought a take-off LS3 intake assembly from a speed shop and it did not come with the MAP or the bolt.
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From: The Burnie, MD
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Joined: Dec 2005
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Good timing.
I just put an L92 MAP on my LS3 intake manifold. I am still letting the black paint dry on the parts or I would have pictures. Anyways for my setup I used a #12 panhead sheet metal screw 1 3/4" long.
I also used a spacer that is .250" in diameter on the inside and .750" long. I had to cut it down to around .625" long. I made up a .125"x.50"x1.00" piece of aluminum to clamp down on the MAP. Drilled a hole big enough for the #12 sheet metal screw to go through on one end of the piece of aluminum. I also had to clip the "ears" off of one side of the MAP so the spacer would fit properly.
Last but not least the o-ring. I went to the local hardward store and bought two 013 o-rings. I only used one. One more thing on the piece of aluminum. I put it in a vice and bent it slightly so that the pressure would be on the center of the MAP sensor when the screw is tightend.
Almost forgot the washer between the screw and the aluminum strap. I am painting the spacer and piece of aluminum black.
I just put an L92 MAP on my LS3 intake manifold. I am still letting the black paint dry on the parts or I would have pictures. Anyways for my setup I used a #12 panhead sheet metal screw 1 3/4" long.I also used a spacer that is .250" in diameter on the inside and .750" long. I had to cut it down to around .625" long. I made up a .125"x.50"x1.00" piece of aluminum to clamp down on the MAP. Drilled a hole big enough for the #12 sheet metal screw to go through on one end of the piece of aluminum. I also had to clip the "ears" off of one side of the MAP so the spacer would fit properly.
Last but not least the o-ring. I went to the local hardward store and bought two 013 o-rings. I only used one. One more thing on the piece of aluminum. I put it in a vice and bent it slightly so that the pressure would be on the center of the MAP sensor when the screw is tightend.
Almost forgot the washer between the screw and the aluminum strap. I am painting the spacer and piece of aluminum black.
Last edited by 1989GTA; Jun 26, 2012 at 05:31 PM.
