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Old 08-07-19, 11:40 PM   #1
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Default Plastic caps on intake manifold?

So my intake manifold has been cracked for ages now, and I finally decided to pick up a used one. It arrived today, and it was pretty manky, so I'm giving it a good clean before I put it on.
Anyway, a few of the ports have these weird yellow plastic caps on them, as in the pics below. Anybody know what the deal is with them?
When I took off my own manifold last year I didn't see anything like them. And I haven't seen anything like them anywhere else.

Should I remove them, or just leave them be? Are they some aftermarket thing that somebody put on to make a seal or something?



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Old 09-07-19, 06:45 PM   #2
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They look like the manifold gaskets to me the design has changed a few times over the year and some aftermarket ones are different colours which could be why you have not noticed them before or they are still in the head

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Old 09-07-19, 08:45 PM   #3
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Quote:
Originally Posted by windy1603 View Post
They look like the manifold gaskets to me the design has changed a few times over the year and some aftermarket ones are different colours which could be why you have not noticed them before or they are still in the head

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Ah right. So you reckon they're there instead of the rubber ring gaskets? I found a rubber gasket on another one of the tubes, could they have been mixed?
How do you reckon I should proceed when fitting this manifold? Use all the same type, the rubber ones, or mix it up? Or remove the plastic ones?
Or does it matter?

I have the old manifold off at the moment, just doing a bit of cleaning around the ports on the head, and I'm just giving the ERG a cleanout while I have easy access..
I'll fit the new one, later or tomorrow..

Edit: Ah yes, nevermind. It was pretty obvious when I went to fit it, I need to use all the rubber gaskets, they just go around the yellow caps.
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Last edited by gijoe50000; 09-07-19 at 11:41 PM. Reason: Update
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