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Closed6 replies

3.0 Air Box Removal

FM Former Member
Hello,

I'm working on a 356 speedster kit car for a good friend (Tom - porscheavw) that has a 3.0 engine - it runs but not real well. He checked for vaccum leaks (fuel injected), but I want to change the intake runner boots and gaskets to be sure. I've looked for information on how to remove the air box to access the intake runners - with no luck. I have already taken the throttle body and fuel mixture control unit off - removed all the screws around the upper part of the air box that looks like it connects it to the lower part of the intake. It will not separate and I don't want to force it and break something. I normally work on Type I VW engines and tranny's - and really need some insight on if I'm missing something. Any help would be greatly appreciated.

Thanks,
John D Brown
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FM Former Member
Hello,

I'm working on a 356 speedster kit car for a good friend (Tom - porscheavw) that has a 3.0 engine - it runs but not real well. He checked for vaccum leaks (fuel injected), but I want to change the intake runner boots and gaskets to be sure. I've looked for information on how to remove the air box to access the intake runners - with no luck. I have already taken the throttle body and fuel mixture control unit off - removed all the screws around the upper part of the air box that looks like it connects it to the lower part of the intake. It will not separate and I don't want to force it and break something. I normally work on Type I VW engines and tranny's - and really need some insight on if I'm missing something. Any help would be greatly appreciated.

Thanks,
John D Brown
FM Former Member
Thanks for the reply - this engine is an earlier type --- according to engine serial number should be around a 1980 era.

The intake runner boots (driver side are accessable), but the air box covers the passenger side. My plan if I can't get any information is to remove driver side intake runners from air box & head --- unbolt the intake runners on the passenger side from the head & remove it that way. Any thoughts?????
FM Former Member
Tom,
Don't know if you saw the Pelican Post... Those guys say that you can remove it from a 911 if you drop the engine a couple of inches (loose and drop). Otherwise, on a 911, you normally cannot remove it and almost guaranteed cannot get it back on. I looked at my CIS car (80 911) and I'm positive that I would have to remove the engine... I lack the technical skills that quite a few of the pelican dudes have. That usually means I have to do things the labor intensive way.

Probably going to have to pull the engine on the IM. Before you commit to that, make sure the big lines that go over to the oil tank are good and that the oil cap gasket is perfect. They run on vacuum...

angela
FM Former Member
Thanks for the information - you have been very helpful.

We do have one more question -- he elecronic box on the throttle body (positioner sensor) was not hooked to anything - no wires in surrounding area with plug to even hook up ---- Is it possible for the car to have run correctly without this being connected?
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