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2002 Forester AT 2017 Forester
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Discussion Starter · #1 ·
17 Forester. First owner installed metal logo valve stem caps. Unfortunately they are now stuck on the stem. Pliers wont work, afraid to rip off the stem and be stuck. Any ideas how to get these off???

Thanks in advance.
 

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2022 Forester Wilderness
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2,379 Posts
carefully dremel works good. depends on how stuck they are. with rubber valve stems i just bent them down abit and let the penetrant soak in.
maybe do it a couple times then try with plyers
if that isnt sufficient...
very carefully score across the top and side with a dremel. Go real slow.. use screwdriver should crack off.
 

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2002 Forester AT 2017 Forester
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Discussion Starter · #8 ·
Thanks all, tried wd40 with no luck. They are stuck good.
Will I need tpms as well if I cave and take it to a tire place?
 

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2017 Forester XT Touring
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1,590 Posts
Try a real penetrating oil like PB Blaster. Unless you absolutely need to take them off immediately to add air, apply it several times over a few days to really let it work its way into the threads.
 

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2021 Forester Limited
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2,577 Posts
Will I need tpms as well

No, if the valve stems get damaged, you'll only need a TPMS rebuild kit, which is mostly a new valve stem that attaches to the TPMS sensor. those should be well under $10 each.

Of course you'll have to pay for having at minimum the tire bead broken to get access to the TPMS, if not the tire totally removed, depending on whether the tire can be pushed in enough.

A smart tire guy will mark the tire to the rim, so it can be installed in the same position, so you don't have to pay for balancing. Unless they needed rebalanced anyways.
 

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2022 Forester Wilderness
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312 Posts
Putting a tiny slice with a Dremel/cutoff wheel should relieve enough tension to get them off. Maybe two cuts. One on opposite sides. Not too deep. Wear safety glasses.
My son just had this problem, he tried penetrating oil, double plyers ext. short of ruining the stems and I lent him my Dremel tool with the diamond metal wheel. Told him to make a shallow cut or two like you said and use a thin screw driver to pry it open and that worked, just don't go too deep into the thread but a slim cut into the threads wouldn't matter. Never use metal valve caps that are a dissimilar metal they will corrode.
 

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2002 Forester AT 2017 Forester
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Discussion Starter · #14 ·
Thanks all! Tried the pb blaster just now. Maybe it needs to seep in overnight? Gonna try the dermal tomorrow. Hopefully don't leave them flat and need a tow 😂
 

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18 Forester Limited 19 Forester Premium
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983 Posts
Fortunately, most modern TPMS modules (including these Schrader brand units) have replaceable Schrader valve stems. So if you ruin them, it will cost you around $7 plus labor to replace.

As others have said, a little Dremel tool work with a cut-off disk will enable you to pry them loose. You will be working way above the valve core, so there's almost no chance that you will compromise things too greatly. But when you are done, rotate each to the point where they point downwards and blow out any debris as that will find it's way to the core seal and create leaks next time you attempt to add air.
 

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2022 Forester Wilderness
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312 Posts
Just to add to what I posted about using the Dremel, it might help to first cut off the tip/end of the cap first.
 
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