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Oil filler neck leak

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Old 05-19-2009, 03:01 PM
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sidehatch
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Default Oil filler neck leak

After redoing my intake,i left the old oil filler neck but i replaced the gasket,it looks like its leaking again into the crevaces filling them with oil,can i leave this alone without any issues,i just dont want to take that intake off again.If i do have to fix what is an alternative to that cheap plastic neck? how can they put that on this engine?
Old 05-19-2009, 03:54 PM
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Bill51sdr
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Intake has to be removed to fix it again. The earlier 32V engines has a metal oil filler neck but my experience is that they leak as well.
Old 05-19-2009, 03:58 PM
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sidehatch
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So its not a good idea to leave it leaking?
Old 05-19-2009, 04:01 PM
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worf928
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By about 120k-miles or so, the plastic filler necks will have warped to the point that they will not seal. You have to buy a new one (~$75).
Old 05-19-2009, 04:06 PM
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the flyin' scotsman
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You can replace the oil filler neck without removing the intake.

The plastic piece is sold with a new gasket and should be included as one of the intake project pieces to replace IMHO.
Old 05-19-2009, 04:12 PM
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Bill51sdr
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Originally Posted by the flyin' scotsman
You can replace the oil filler neck without removing the intake.
I stand corrected .
Old 05-19-2009, 04:13 PM
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devilinblack
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Just sell it and lease a Prius.
Old 05-19-2009, 04:18 PM
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sidehatch
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No thanks austin powers ahahhahhahhah
Old 05-19-2009, 04:29 PM
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Originally Posted by sidehatch
So its not a good idea to leave it leaking?
Uh, no it is not a good idea to leave it leaking.
Old 05-19-2009, 04:36 PM
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worf928
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Originally Posted by Bill Swift
I stand corrected .
Maybe.

Technically it is often possible to replace the filler neck without removing the intake. One way is to loosen the intake, lift it up onto the studs and back just enough to get to the filler neck bolts. The other is to remove (and then reseal with new gaskets) the coolant bridge to get access to the filler neck. The problem with the second method is that it sometimes cannot work due to casting variations in the intake and coolant bridge. Also, I do not like doing it that way as you have to use a long ball-ended Allen bit on the torque wrench for the rear bridge bolts and thus I don't think it ends up correctly torqued.

Leaving the filler neck badly leaking is a great way to destroy new knock sensors.
Old 05-19-2009, 04:47 PM
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Bill51sdr
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Originally Posted by worf928
Maybe.

Technically it is often possible to replace the filler neck without removing the intake. One way is to loosen the intake, lift it up onto the studs and back just enough to get to the filler neck bolts. The other is to remove (and then reseal with new gaskets) the coolant bridge to get access to the filler neck. The problem with the second method is that it sometimes cannot work due to casting variations in the intake and coolant bridge. Also, I do not like doing it that way as you have to use a long ball-ended Allen bit on the torque wrench for the rear bridge bolts and thus I don't think it ends up correctly torqued.

Leaving the filler neck badly leaking is a great way to destroy new knock sensors.
If you have to loosen the intake to tilt it up, you might as well just remove it, IMO. It's not that difficult a task and you get to clean up the mess the leaking filler neck made, not to mention the situation you state about the dubious torque of the bolts.
Old 05-19-2009, 04:47 PM
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Tom. M
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His 89 should have the hole in the back of the valley....so all that oil will wash down the back of the block and drip right behind engine .. no worries...
Old 05-19-2009, 04:58 PM
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sidehatch
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This is bull**** with this car,who designed this filler neck?
Old 05-19-2009, 05:04 PM
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the flyin' scotsman
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Originally Posted by worf928
The other is to remove (and then reseal with new gaskets) the coolant bridge to get access to the filler neck.
Correct

Originally Posted by worf928
The problem with the second method is that it sometimes cannot work due to casting variations in the intake and coolant bridge. Also, I do not like doing it that way as you have to use a long ball-ended Allen bit on the torque wrench for the rear bridge bolts and thus I don't think it ends up correctly torqued.
I didn't find either on my '88 but it is a tight fit so could understand the variations being a problem.

Originally Posted by worf928
Leaving the filler neck badly leaking is a great way to destroy new knock sensors.
As well the oil could seep to a point where it it start to smoke or worse catch fire.

If you haven't had the waterbridge off its worth a try. If you cant get it off without disturbing the intake at least there's another project done; 4 gaskets, a seal and a new t.stat.
Old 05-19-2009, 07:12 PM
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Originally Posted by Bill Swift
... It's not that difficult a task and you get to clean up the mess the leaking filler neck made...
If you catch the leak early enough that the mess is easy to clean, you can do the filler neck in about half the time using the loosen-and-lift method. It is only a good idea if all of the intake rubber is very recent. If not then yes, remove it and do the full job.

The dubious torque issue has to do with the alternate coolant bridge removal method.


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