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Any Alternative Fiero Thermostat Caps that you can get off without Channel Locks? by JohnWPB
Started on: 06-28-2017 09:44 PM
Replies: 14 (452 views)
Last post by: Kevin87FieroGT on 07-03-2017 08:39 AM
JohnWPB
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Report this Post06-28-2017 09:44 PM Click Here to See the Profile for JohnWPBClick Here to visit JohnWPB's HomePageSend a Private Message to JohnWPBEdit/Delete MessageReply w/QuoteDirect Link to This Post
Are there any alternatives from other cars that can be used on the Fiero. I sanded the top of the thermostat housing with fine sandpaper, and added a few drops of machine oil, and a brand new OEM cap. It is still very hard to get off. I have to use channel locks most of the time. This is the my 3rd Thermostat housing / engine in my car, and they are all have been the same.

I am looking for something that is not round and smooth, that you can actually take off, no tools required

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fierofool
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Report this Post06-28-2017 09:48 PM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
Though I have a pair of channel locks that may do the trick, I like to use the oil filter wrench that fits the Fiero oil filter. It has a good handle for leverage, the band squeezes on the cap without doing damage. I've never seen one on a Fiero that had the two ears like some caps have.
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pmbrunelle
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Report this Post06-28-2017 10:34 PM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
I use heavy leather gloves and both hands to unscrew it.

Otherwise, maybe you could weld some tacks on the exterior, to make the exterior bumpy.

Or, weld a socket to it (square drive facing up), so it can be turned with a rachet wrench.
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theogre
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Report this Post06-29-2017 12:50 AM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
Use GM ACdelco or Stant Tstat caps.
Most if not all "Store brand" caps are made by MotoRad and look the same as Stant to many buyers have enough differences they are very tight or not to fit at all.

Ever w/ good caps...
Use Brake grease on the housing "track" and cap ears where they tighten the caps.
See my Cave, Thermostat

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(Jurassic Park)


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Patrick
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Report this Post06-29-2017 03:10 AM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by JohnWPB:

Are there any alternatives from other cars that can be used on the Fiero. I sanded the top of the thermostat housing with fine sandpaper, and added a few drops of machine oil, and a brand new OEM cap. It is still very hard to get off.


From the vaults...

 
quote
Originally posted by Patrick Here:

That reminds me of a discussion we've had here previously... I forget if it's a brand thing or a generational thing, but some of the thermostat caps have a seal that does not pivot separately from the cap. Those caps are awful as it's very difficult to open or close these caps when the rubber seal is forced to rotate/rub on the top of the thermostat housing. On the good caps, the rubber seal spins freely... which means the seal can stay put on the housing as the cap is turned and tightened (or loosened).

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andreww
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Report this Post06-29-2017 07:14 AM Click Here to See the Profile for andrewwSend a Private Message to andrewwEdit/Delete MessageReply w/QuoteDirect Link to This Post
Heavy rubber kitchen gloves. Works like a charm.
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Blacktree
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Report this Post06-29-2017 09:09 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
Next time you buy a thermostat cap, check to see if the "rubber donut" seal can rotate freely. If not, that cap will be difficult to remove. Another trick is to spread a light coating of grease on that rubber seal, and on the top of the thermostat housing. Oil may not be thick enough to help. Try something thicker, like wheel bearing grease.

And if that fails, then throw an oil filter wrench in the trunk.
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theogre
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Report this Post07-01-2017 01:11 AM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Blacktree:
Next time you buy a thermostat cap, check to see if the "rubber donut" seal can rotate freely. If not, that cap will be difficult to remove. Another trick is to spread a light coating of grease on that rubber seal, and on the top of the thermostat housing. Oil may not be thick enough to help. Try something thicker, like wheel bearing grease.

And if that fails, then throw an oil filter wrench in the trunk.
Most grease/oil will ruin coolant rubber parts. Is why I said use Brake Grease.

Stant cap's rubber will not cause the problem here. Stant made a lot of OE caps and many have OEM labeling but still have S logo somewhere you can see.
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rogergarrison
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Report this Post07-01-2017 07:01 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
Just push down as you turn it. You could weld a few tabs on the top sticking up if its a problem. Ive had regular radiator caps like that in the past. Or buy one that has 'ears' on the sides.

https://www.steinertractor....H6vVB5MaApoaEALw_wcB
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Blacktree
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Report this Post07-02-2017 12:43 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by rogergarrison: Just push down as you turn it.

I didn't even think about this, because it's become second nature. But yes, pushing down on the cap will make it easier to turn.
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fiero4.3L
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Report this Post07-02-2017 11:20 AM Click Here to See the Profile for fiero4.3LClick Here to visit fiero4.3L's HomePageClick Here to Email fiero4.3LSend a Private Message to fiero4.3LEdit/Delete MessageReply w/QuoteDirect Link to This Post
The cap is only slightly larger than a standard quart mason jar lid, maybe an 1/8". There are rubber rags if you just need a better grip or handled grips if you also need leverage without the possibility of damaging the cap.
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theogre
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Report this Post07-02-2017 08:21 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fiero4.3L:
The cap is only slightly larger than a standard quart mason jar lid, maybe an 1/8". There are rubber rags if you just need a better grip or handled grips if you also need leverage without the possibility of damaging the cap.
That or almost any kind of strap wench works.
Can Get in kitchen section, as normal tools, plumbing section, etc.

Push down might not work for Fiero Tstat. Does work to remove many Rad caps.

Fiero Tstat caps on l4 and V6 are awkward for many people. Where they are makes it hard to turn and/or push down.
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pmbrunelle
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Report this Post07-03-2017 12:27 AM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by theogre:
Fiero Tstat caps on l4 and V6 are awkward for many people. Where they are makes it hard to turn and/or push down.


On the V6, I remove the RH decklid vent to get good access. Reaching while standing on the right side of the car is then easy. I have only had notchbacks though.

With a fastback V6, it seems like the quarter window would be in the way, but I don't know.
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sardonyx247
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Report this Post07-03-2017 07:37 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
Silicone paste is the correct grease to use on rubber, it doesn't eat it and is very water proof. (IE: die electric grease, plumbers paste etc)
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Kevin87FieroGT
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Report this Post07-03-2017 08:39 AM Click Here to See the Profile for Kevin87FieroGTSend a Private Message to Kevin87FieroGTEdit/Delete MessageReply w/QuoteDirect Link to This Post
I was going to say the same. Use plumbers lube (silicone grease, clear, comes in a small plastic tub at hardware store, $3). It works great on all rubber seals at all temps and generally last a long long time. Does a nice job with o-rings as well.
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