Need correct way to clean intake manifolds - Team Camaro Tech
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post #1 of 4 (permalink) Old Sep 10th, 03, 10:54 PM Thread Starter
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Location: The Mighty Midwest
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How do you clean an intake manifold correctly? I know that the final step should be to hot tank it followed by a good hosedown with hot water, but before this step I have to take the heat shield off first. There are several rivits that have to come out so that the cleaning solution can get to all the crud baked in underneath. I had this problem before and ended up having to chisel off the heads of all the rivits and then drilling the remaining rivits out of each hole. Once the heat shield was off and the intake "cleaned", I never could get the heat shield back on correctly. I was so afraid of cracking it that I eventually would up having to replace it (the whole manifold). How do you remove the heat shield correctly, clean the intake manifold properly, and reinstall the heat shield without destroying it?

[ 09-11-2003, 04:34 AM: Message edited by: garfield ]

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post #2 of 4 (permalink) Old Sep 11th, 03, 09:12 AM
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Matt Jones
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Location: Renton, WA USA
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I did that a while back, and I drilled out the rivits, let it sit in my parts washer for a while, then I sand blasted it. Looked like new.

Oh, to put the heat shield back on, I just used sheetmetal screws. I've seen rivits out there that look OE, but a waste of time IMO if you can never see them.

Matt Jones
Lead Mechanical Engineer
Art Morrison Ent. Inc.
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post #3 of 4 (permalink) Old Sep 11th, 03, 09:45 AM
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On aluminum intakes the rivets can be removed by using a thin bladed standard screwdriver and a hammer. Place the tip of the screwdriver under the edge of the tin shield close to the rivet (enter from either end, not the side) and on top of the aluminum ridge the rivet goes into. Use the screwdriver to "ramp" the rivet up and out of the hole. Do this on all four corners. Remove the carbon and trash from the bottom of the intake and the tin shield. Wash the manifold with liquid laundry detergent and water. Paint remover or Permatex Gasket Remover sometimes helps. If you want a factory looking finish, you can scrub the intake with green or purple Scotchbrite and Works brand Tile Cleaner or Aluma Prep. Just be sure to rinse the stuff off regularly or the manifold will turn Black! If the manifold is really nasty you can glass bead it first, then smooth out the surface with steel wool before using the aluminum cleaner. Usually I can reuse the old rivets by turning them so they fit tight bebore I drive them back in. If not just put some JB Weld in the holes before you replace the tin shield. Same thing works on cast Iron but you can just blast them clean and paint.

Jon N

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post #4 of 4 (permalink) Old Sep 11th, 03, 11:57 AM Thread Starter
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Thanks, I'll give it a try
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