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Old 10-14-2011, 01:33 PM   #1
thoughto
Scooby Newbie
 
Member#: 29145
Join Date: Nov 2002
Location: Woking, home of Mclaren
Vehicle:
1998 Version 4 STI
White, gold wheels

Default Strip EJ20K Intake Manifold

I have removed the intake manifold, removed the injectors (an absolute nightmare, not recommended), the fuel rails, the BPV and turbo intake pipe etc. All that is left is the throttle body and the IAC valve (I think that is it, says ABC on top).
I want to remove them and clean the whole lot before reassembling. [I just sent off the injectors for sonication / flow matching.]
The IAC valve I unscrewed the bolts and most of it came out. The cardboard(?) gasket doesn't look great, and there is a rubber looking piece still in the manifold. I'd like to push that out with a screwdriver if that isn't too risky.
The throttle body seems to be jammed on. I undid the 4 bolts but it didn't want to move. If I hit it with a rubber hammer or something I'll probably wreck the gasket, but is there anything else holding it on?
I will search the part number thread for the gaskets, but if anyone knows offhand would be nice.
I hope after those things are off I can clean up thoroughly.
Any tips on great ways to clean up rails, rubber tubing with oily residue (possibly 13 years old) etc would be appreciated. I will change all fuel line and a few bits of vac line (a couple of pieces were so brittle they snapped). I think the fuel line I can just use generic and cut to fit, but would the vac line have to be correctly bent factory stuff or will generic do?
Thanks a lot. Tom
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Old 10-15-2011, 10:08 AM   #2
thoughto
Scooby Newbie
 
Member#: 29145
Join Date: Nov 2002
Location: Woking, home of Mclaren
Vehicle:
1998 Version 4 STI
White, gold wheels

Default

Update: throttle body tapped off with big rubber mallet no problem. Gasket looks good still.
Remnant of IAC valve left in manifold fell out when I turned the manifold upside down. All looks well. I now have a bare manifold to clean. Next step is to remove the flaky red paint.
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Old 10-15-2011, 04:15 PM   #3
linsavy
Scooby Specialist
 
Member#: 11620
Join Date: Oct 2001
Location: Ontario
Vehicle:
1997 GF4-STiV3 clone

Default

I have thought about taking mine off to repaint. Thanks for reminding me that I'm way too lazy to actually do it.
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Old 10-16-2011, 04:32 AM   #4
thoughto
Scooby Newbie
 
Member#: 29145
Join Date: Nov 2002
Location: Woking, home of Mclaren
Vehicle:
1998 Version 4 STI
White, gold wheels

Default

Hey I'm sure you have better things to do with your time! Getting off the last of the red paint is a royal PITA. I gave up. There is just a little bit left, at least it won't make a mess when it flakes off, and lets people know it's an original STI engine.
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