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Old 08-19-2019, 11:35 AM   #1
Cavell
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2003 VUE 3.0L
Default 3.0 intake bolts

a seller of an 02 3.0 says the intake plenum bolts are stripped. i have never removed the top plate of plenum before. always lifted the entire upper intake off after removing the 5-6 torx bolts. what is procedure to deal with stripped plenum bolts? maybe he is trying to take off top of plenum?

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Old 08-19-2019, 04:16 PM   #2
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

i talked to him. he says it is the 5-6 bolts and 3 of them are messed up. could you use a long drill, say 5" or so and drill off the torx bolt head? he says it runs ok and may or may not have a misfire. he just wanted to move on and wanted to make sure the buyer knew of the stripped bolt issue

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Old 08-19-2019, 07:17 PM   #3
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2003 L-Series 3.0L Sedan
Default Re: 3.0 intake bolts

Torx or hex head, they can be drilled to remove the head and leave the threaded part for removal after the plenum is removed. A regular drill can work but may remove too much aluminum. Have an image of your engine and closeup of where the damaged parts are on the other engine? Use your engine plenum as reference. Torx heads need a center punch to the center of the bolt head so a drill won't wander.

Is there enough head left to clamp a vise grip plier onto it. Some pb blaster to soak under and into threads may help loosen a seized bolt. Working the seized bolt just a few degrees counter clockwise then tightening will allow penetrant to enter and soak. Unscrewing then screwing the bolt can loosen rust or corroded aluminum threads on steel bolts until the bolt loosens completely for removal. Patience for this type of repair. If things go well, you may not have to chase/rethread the damaged threads with a tap matching threads. A bottom tap is usually used as opposed to a starting tap - more threads on the bottom tap to help rethread allow the way down to the bottom. Starting taps are for thru holes where the tap goes all the way until the shank stops further tapping. Only the middle part of starting taps thread. Bottom taps help rethread the entire length of the hole.

Do you mean stripped plenum threads on the manifold? Stripping threads on bolts are more difficult since bolts are made of steel. Most upper cylinder intake manifolds are made of cast aluminum and machine finished with threaded holes for bolts. Steel bolts easily strips aluminum threads when they're misaligned during fastening or over tightened. The same for steel spark plugs over tightened onto aluminum cylinder heads. Older cast iron heads have less threads because it's difficult to strip them. Spark plugs didn't have a lot of threads for this reason. Aluminium cylinder heads have more threads to help prevent stripping them along with longer threaded plugs. If the manifold uses steel threaded inserts, the inserts will need to be drilled for a helicoil. Examine the manifold for plain aluminum threaded holes or if a steel insert is in place to provide strength against over tightening. Does the manifold use brass inserts? Plastic manifold with brass inserts for threads?

If the manifold (aluminum or plastic) have stripped threads (aluminum threaded, brass or steel inserts), there are two repairs; helicoil insert using steel threads or drilling the hole to thread the next size metric bolt. Either way, the aluminum, brass or steel threads are drilled then a special tap is used to create special threads. The steel insert (a coil) is screwed into the new threads and the tang on the end breaks off so the threads are like new using the original bolts. Helicoils are sized for SAE or metric threads and come with one or several inserts along with an applicator tool. You supply a tap handle.

Worse case scenario; stripped threads are so large, inserts to have the same bolt size cannot work and the hole its drilled to tap new threads one size larger than the bolts. The diameter of the bolt is used to determine the next size bolt. The plenum may have to be drilled for a larger bolt.

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Old 08-19-2019, 08:02 PM   #4
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

I believe itís the bolts that hold the upper intake to the lower intake. Itís under the flat black trim piece. Under the goofy plastic snorkel. Anyone who has worked on a 3.0 should know what Iím talking about. Itís the torx ďheadĒ that is stripped. Not the portion that screws into the lower intake

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Old 08-20-2019, 01:21 AM   #5
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2003 L-Series 3.0L Sedan
Default Re: 3.0 intake bolts

Vues use a different upper intake than L300s. Both use the same 3.0L V6 engine but different upper intake manifolds. Here's an L300 3.0L engine in factory livery.
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Old 08-20-2019, 09:47 AM   #6
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

the vue 3.0 has the plenum box with the flapper ducts inside. i sometimes see the box top removed at boneyard. usually the entire plenum is lifted up and than the coils can be removed. i may have seen 1 or 2 lower intakes removed and 1 head yanked off. but that is rare and days of past. quite hard to even find the 3.0 vues in boneyard now.
so, a stripped bolt head is quite the issue. a 10-24 screw that is at the bottom of a 4" deep 1/2" dia hole.

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Old 08-21-2019, 11:59 AM   #7
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

might pass on the vue and get a newer V6 model with a rusty rear trailing arm mount. only 2 miles from my home. it has lower miles than the intake vue and it is the honda motor which i like

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Old 08-27-2019, 12:30 PM   #8
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

talked to seller on 08/24 and he was leaving for 10day vac. so i have to wait on that. the 05 with the rusted control arm mount is not responding to emails.

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Old 08-30-2019, 08:26 AM   #9
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

well, i found another 3.0 vue for same money and it has no issues. looking at it today. got a buyer for my equinox lined up so i need a driver.

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Old 09-08-2019, 09:37 AM   #10
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2003 VUE 3.0L
Default Re: 3.0 intake bolts

got a used crank sensor at junkyard as i was searching for a hitch.
funny the intake was lifted up and the lower intake plate was gone?
WHO needs a lower intake plate. between the heads?
kids vue runs now. sensor is 900 ohms. put new brake hoses on
vue finally stops normally. as in, nose down when you hit brakes
going to pull intake on her vue today as the rear VC gasket is leaking
minor stuff. but its not hard
the other vue with the intake bolts is still for sale.

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