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Upper/Lower intake manifold gasket replacement

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Old 10-23-2014, 09:50 AM
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93LX5.0L5SpdConv
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Default Upper/Lower intake manifold gasket replacement

Picking up from ECM Inspection thread:

The upper's off, gasket looks good - I don't see a hose that's supposed to plug into the 1/2" (ish...) male vacuum fitting facing the rear of the car.

What goes there, a hose or a plug?
Attached Thumbnails Upper/Lower intake manifold gasket replacement-upper-looking-from-pass-side.jpg  
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Old 10-23-2014, 09:56 AM
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dawson1112
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Name:  Stock2520Upper2520Hoses_zps553ae695.jpg
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Plug it
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Old 10-23-2014, 10:26 AM
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93LX5.0L5SpdConv
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It looks like all of my connections are on the opposite side from yours, mine has the tube to the charcoal canister heading out towards the front of the car.
Either way, the outlet next to the MAP sensor/vacuum tree/FPR is capped? If so then I seem to have just lost that cap.
Attached Thumbnails Upper/Lower intake manifold gasket replacement-upper-looking-from-pass-side-wide.jpg  
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Old 10-23-2014, 12:27 PM
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mjr46
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Originally Posted by 93LX5.0L5SpdConv
It looks like all of my connections are on the opposite side from yours, mine has the tube to the charcoal canister heading out towards the front of the car.
Either way, the outlet next to the MAP sensor/vacuum tree/FPR is capped? If so then I seem to have just lost that cap.
if that cap was off and you didn't pull it off then there is your large vac leak that was causing the issue
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Old 10-23-2014, 01:50 PM
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93LX5.0L5SpdConv
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Yeah, and it's nowhere to be found, musta just disintegrated away...

Ready to put it all back together, thanks for all the help guys, I'll (hopefully...) post how well it's running in a couple hours.
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Old 10-23-2014, 02:11 PM
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Is threadlocker blue on the upper intake bolts a good idea or a mistake?

And I've seen max torque for these bolts as 18ftlbs and 24ftlbs, which is it?
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Old 10-23-2014, 03:07 PM
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You don't need any thread loc on them , just bolt it on. I never paid any attention to the torque of the upper intake bolts, I generally just snug em down, but if you want to be sure then I believe the torque is 12-18 ft.lbs and no particular pattern to it.
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Old 10-23-2014, 03:25 PM
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Awesome. They're in, I'll take em to 18 from the center out.
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Old 10-23-2014, 04:04 PM
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WELL !!! I can't stand the suspense.
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Old 10-23-2014, 05:34 PM
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6:32pm: Just went around the block to test drive. Came back, reset timing to a hair over 10*, runs, sounds, feels AWESOME!

Now the official test - to the bar!
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