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Discussion Starter · #1 ·
I just installed an oil catch tank system in my 1989 180SX. The reasons were varied- 1) blow by after hard running, 2) the dislike of oily film lining my intake piping and 3) the discovery of sludge-like gunk in my intake manifold. This leads me to my question- what is the best way to clean the tar-like deposits from the inside of the manifold without removing the manifold from the head?

I will eventually remove the manifold in order to do some headwork for my S14 turbine install, but that is a few months away after I've saved some more money up for fuel pump, injectors, AVC-R, metal head gasket and Z32 AFM.

By the way, the oil catch tank works great!

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