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Thread: V8 intake upper manifold removal

  1. 27th May 2011, 09:10 AM #1
    northiam's Avatar
    northiam
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    V8 intake upper manifold removal

    I plan to remove the upper intake manifold.
    Will I need a new gasket? hoping it is dry fitted and reusable.
    I want to replace that push release brake servo pipe connector and pipe, is the connector in the manifold screwed it? if so what thread? What size vacuum hose?
    Where is the pcv(s) located?
    I got a bit of a rough idle, plugs, leads anything else simple?

    thanks in advance
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  2. 27th May 2011, 09:19 AM #2
    PhilipA
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    Thor has a tin gasket between upper and lower. It's probably a good idea to replace it as over time the sprung rings lose tension.

    No PCV , however there is a non return valve between the intake on the LH rocker and the inlet.
    Cannot help with the vacuum input as mine is bodged up as I have the Thor on a 14CUX 3.9
    Regards Philip A
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  3. 27th May 2011, 09:31 AM #3
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    clubagreenie
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    I did away with the gasket and used loctite 515. Not had an issue so far.
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  4. 27th May 2011, 12:00 PM #4
    biggin
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    Replace the throttle body heater gasket while you have it off.
    That is, if you haven't already bypassed it. Which would be easy to do then also, as it gets rid of one of the useless hard and brittle coolant tubes.
    2002 D2 4.6L V8 Auto SLS+2" ACE CDL Truetrac(F) Nanocom(V8 only)
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  5. 27th May 2011, 04:34 PM #5
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    northiam
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    Quote Originally Posted by biggin View Post
    Replace the throttle body heater gasket while you have it off.
    That is, if you haven't already bypassed it. Which would be easy to do then also, as it gets rid of one of the useless hard and brittle coolant tubes.
    Will do
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  6. 27th May 2011, 04:40 PM #6
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    northiam
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    Thanks for the replys
    Whislt I have the upper off I was thinkin about drilling and tapping the runners for injected LPG?
    Should save me some coin when LPG conversion is done in future!
    Is there a standard thread size? Looks like 1/8 npt..
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  7. 27th May 2011, 05:06 PM #7
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    bee utey
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    Quote Originally Posted by northiam View Post
    Thanks for the replys
    Whislt I have the upper off I was thinkin about drilling and tapping the runners for injected LPG?
    Should save me some coin when LPG conversion is done in future!
    Is there a standard thread size? Looks like 1/8 npt..
    Most I have seen are M6 x 1.0 thread. I suggest you wait for the gas system is going on as removing the manifold top isn't actually that hard. Then you will know for sure where the holes need to go.
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