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Registered
Join Date: Feb 2006
Location: Somerville, MA
Posts: 25
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Intake manifold boot
Lioking at a car that's having it's intake manifold boot replaced because it cracked. Then the replacement cracked when the mechanic test drove the car. Is there anything more serious lurking or just a bad part or install?
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06-23-2012, 09:15 AM
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Moderator
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Are you talking about the large rubber coupler? If so, that would be mechanic fault. Those things when new are very flexible and durable.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD** 
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06-23-2012, 11:19 AM
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Registered
Join Date: Feb 2006
Location: Somerville, MA
Posts: 25
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Yes, exactly. Didn't seem like something that should cause problems. Not sure why there isn't a metal band through the middle of it unless it needs to flex a lot.
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06-23-2012, 01:53 PM
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Registered User
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What year is the car and what are you calling the intake manifold boot. Most intake rubber never cracks, it usually swells and gets soft because of oil in the intake tract over the years.
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1979 928 85 Euro 2v motor,S4 Brakes and suspension, 1988 951 street legal track car(sold) Neon SRT4 track car |
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06-23-2012, 03:31 PM
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Registered
Join Date: Feb 2006
Location: Somerville, MA
Posts: 25
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It's a 1980 euro S. I'm talking about the 4" sleeve between the upper and lower intake. It's held in place by two clamps.
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06-23-2012, 08:38 PM
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1979 5sp 928 project
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I replaced mine with a new one just about a month ago. Old one was hard and brittle. The new one was soft as a radiator hose when i installed it. I do not see how it could crack in the slightest unless it was damaged going on. They are not the easiest things to install while making sure you have it sealed properly.
He is talking about the 4" diameter hose between the upper and lower plenum.
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1979 928 5sp project 1984 928S 5sp black on black |
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06-24-2012, 02:39 PM
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Moderator
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I've seen both, either balloned up by oil or hard and brittle. Either way, a new one will not break unless the coupler was defective to start with or your mechanic is defective.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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06-24-2012, 06:23 PM
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Registered User
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If it's a Euro you can't order a normal one (US too small). I believe you need to use the one from a 32v 5 liter.
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1979 928 85 Euro 2v motor,S4 Brakes and suspension, 1988 951 street legal track car(sold) Neon SRT4 track car |
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06-25-2012, 04:02 AM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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Quote:
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06-25-2012, 05:52 PM
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1988 Porsche 951
