Intake manifold repair help.

[unabashedpraise]

Should I worry about looking at anything specific while the valve covers are off?


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[east302]

Here are the torque patterns and tightening sequences...

Lower intake





Upper intake







Note that the evap purge solenoid is also 89 in-lbs and requires the thread sealant like the other manifold studs...






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[east302]

Should I worry about looking at anything specific while the valve covers are off?


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I didn't, just made sure that no debris fell in.

As for the lifter valley under the lower intake, if it's full of oil crud it may be best to leave it alone lest you accidentally get oil debris into the passages, potentially clogging the oil pickup screen.

Others may know of a way to get it cleaned if it is really gunked up.




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[unabashedpraise]

Here are the torque patterns and tightening sequences...

Lower intake





Upper intake







Note that the evap purge solenoid is also 89 in-lbs and requires the thread sealant like the other manifold studs...






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Fantastic!

Do you have the part numbers for the fuel rings and spacers?


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[unabashedpraise]

I didn't, just made sure that no debris fell in.

As for the lifter valley under the lower intake, if it's full of oil crud it may be best to leave it alone lest you accidentally get oil debris into the passages, potentially clogging the oil pickup screen.

Others may know of a way to get it cleaned if it is really gunked up.




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Shop vac?


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[east302]

I switched to the MPFI while I was in there (Delco 217-3029) which came with all gaskets, o-rings and spacers. But, when ordering I didn't know it came with everything so also picked up a kit...

http://www.rockauto.com/en/moreinfo.php?pk=88862&cc=1303614&jnid=454&jpid=2

Lucky I did, I dropped a spacer and never found it so was glad I had the spare.




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[east302]

Shop vac?


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Probably so, if you're careful since the passages may have gunk on top of them. The lifter guide retainer tray can be removed for better access. Those bolts are torqued to 18 ft-lbs.




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[unabashedpraise]

Love these alldata pages!


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[east302]

Subscriptions are not bad, $20-something per year per vehicle. I've gotten a lot of use from them.

Alldatadiy.com


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[wolfeman2120]

looks like your doing the lower intake, my advice on the lower intake bolts is just to hand tighten them and give them an 1/8th of a turn once they tighten up. I've broken a couple in the head before. they are just aluminium and can snap pretty easily.

As for the distributor, you don't necessarily need OBD2 to set the timing right. If you got a good quality distributor like I did from Standard Motor there should be a small arrow pointing to where the rotor should be for TOC. Then just rotate the engine to TOC and you should be fine. You can then twist the distributor a tiny bit here and there if your getting a code. Mine ran perfectly once I figured this out.

The AC bracket if I recall correctly has 3 bolts and 1 nut holding it in place. one bolt is near the bottom and can be a pain to get to. removing the fan could make it easier but who has that tool lying around. Then you can just wiggle the bracket forward enough to pull the intake off.

getting the intake out will be kinda hard if it was sealed in good, so you may want some help getting it out.

I know getting it back on was tricky too. I removed the oil pressure sensor on the back by the distributor. You will likely want someone to help you put it in cause the angles and wires can make things a nightmare when doing it yourself and you have RTV on the front and rear that needs to be pressed down evenly.