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Cleaning plastic intake manifold interior #4480703
08/06/17 10:36 AM
08/06/17 10:36 AM
Joined: Aug 2009
Posts: 14
FL USA
JimMueller Offline OP
JimMueller  Offline OP
Joined: Aug 2009
Posts: 14
FL USA
I need to ship an LS nylon composite intake manifold for testing. It has been requested that the intake plenum and runners be thoroughly cleaned prior to shipment. I don't think I'll be able to get my hand inside the manifold but it will be off the vehicle for cleaning; what can I use to safely clean the inside of the manifold?

Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4480708
08/06/17 10:44 AM
08/06/17 10:44 AM
Joined: May 2012
Posts: 1,404
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,404
Georgia
I would use a large plastic tub and soak it. Pinesol and water should work well, or something like Simple Green or another degreaser like LA Totally Awesome. Or Lye and water.

Last edited by AVB; 08/06/17 10:45 AM.
Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4480874
08/06/17 01:17 PM
08/06/17 01:17 PM
Joined: Nov 2006
Posts: 20,570
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,570
MA, Mittelfranken.de
Purple Power, its harmless to plastics but do not get it on anything aluminum for very long. Clean it inside with something like this..

https://www.amazon.com/Tebery-Flexible-P...+cleaning+brush


ASE L1, Master. Deutsch Meisterbrief.
Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4480909
08/06/17 01:52 PM
08/06/17 01:52 PM
Joined: Dec 2016
Posts: 7,143
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,143
Waco, TX
Good suggestions, Simple Green cuts grease well.

Then - power wash the living daylights out of it!!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4480967
08/06/17 03:01 PM
08/06/17 03:01 PM
Joined: Dec 2006
Posts: 1,460
Michigan
MrHorspwer Offline
MrHorspwer  Offline
Joined: Dec 2006
Posts: 1,460
Michigan
I actually just did this project.

I bought an LS6 intake that has been sitting in a dusty garage. Picked up a big Rubbermaid bin and filled it with Dawn and hot water. Let the intake soak overnight, used a bottle brush in the runners and a wheel cleaning brush in plenum, rinsed it out, and let it air dry.

Nice and clean. It's now on the car... doing it's part to help change rubber into smoke.

Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4481017
08/06/17 04:01 PM
08/06/17 04:01 PM
Joined: Jan 2013
Posts: 396
West Yorkshire, UK
NGRhodes Offline
NGRhodes  Offline
Joined: Jan 2013
Posts: 396
West Yorkshire, UK
Dishwasher ?

Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4481059
08/06/17 04:42 PM
08/06/17 04:42 PM
Joined: Aug 2009
Posts: 14
FL USA
JimMueller Offline OP
JimMueller  Offline OP
Joined: Aug 2009
Posts: 14
FL USA
Part of the porting process added metal bars inside the plenum to help the air turn towards the runners. There was also epoxy and a special type of plastic glue used in the porting process. I don't want the solvent to affect those changes.

Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4481188
08/06/17 07:08 PM
08/06/17 07:08 PM
Joined: May 2012
Posts: 1,404
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,404
Georgia
Pinesol will cause rubber to swell, I don't know what it would do to the glue. Simple green, purple power or dawn should be fine.

Re: Cleaning plastic intake manifold interior [Re: JimMueller] #4523585
09/22/17 07:59 PM
09/22/17 07:59 PM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
Blue dawn and boiling hot water will strip grease astonishingly well. Skin too if you're not careful


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30

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