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Splitting single unit inlet and exhaust manifold 140-160

posted by  vvpete on  Thu Sep 9 05:52 CST 2004
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last visit: Thu Jul 10 14:10 CST 2014
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If you want to cut the manifold, I have used a Milwaukee 4 1/2 inch grinder with a cut-off wheel to do this on a few of the one-piece manifolds. I caution you against using a welding torche because the thermal stress on the manifold can warp the seating surface and propagate internal cracks and fissures that will show up later. It would be easier to find a B20F exhaust manifold. I've seen someone make a custom carb set-up using a cut B20F intake manifold and welding an aluminum plate to the input ports, but that was for a 4 carb set-up.

On the different thickness manifold flanges, I broke a nice aluminum intake manifold from a B18B even using the proper stepped washer thickness. When the manifolds heat up, they expand at different rates and any small difference in washer height can crack the intake flanges.
--
'89 245 Sportwagon, '04 V70 2.5T Sportwagon






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