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Old 10-04-2022, 07:59 PM   #1
VolvoLatAm
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Default Why are thermostat housings sold individually?

Why are aluminum thermostat housings sold individually?
Do they crack?
Do they not seal well eventually?
Curious for why this product is available because there aren't many other cast aluminum items on the car sold individually as replacement parts...

original
https://www.ipdusa.com/products/1879...-463434-238517

aftermarket
https://www.ipdusa.com/products/4937...-463434-113818
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Old 10-04-2022, 08:05 PM   #2
James M
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Corrosion on the sealing surface can cause them to leak even with a new gasket. That being said I've yet to notice an aftermarket one and $70 vs $14 is a pretty damn big difference
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Old 10-04-2022, 08:05 PM   #3
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Corrosion is the first thing that comes to mind.
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Old 10-04-2022, 08:31 PM   #4
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have they actually corroded enough (being aluminum alloy) to leak though for any of you?
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Old 10-04-2022, 08:56 PM   #5
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What James said.

The corrosion usually happens in the area where the seal fits so it leaks past the seal. It's rare for it to leak through a pinhole in the housing itself.
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Old 10-04-2022, 09:30 PM   #6
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Pretty much every housing I've taken off an older car is riddled with pits from corrosion.

On one I was able to stop a slow leak with a bit of RTV, but I just replaced the thing after a while.
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Old 10-04-2022, 09:47 PM   #7
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Quote:
Originally Posted by spock345 View Post
Pretty much every housing I've taken off an older car is riddled with pits from corrosion.

On one I was able to stop a slow leak with a bit of RTV, but I just replaced the thing after a while.
had no idea the channels around the seals could get that bad
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Old 10-04-2022, 11:18 PM   #8
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maybe because you only need one per car ?
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Old 10-04-2022, 11:28 PM   #9
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if you see anything else sold individually it might also not last forever
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Old 10-04-2022, 11:33 PM   #10
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Quote:
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if you see anything else sold individually it might also not last forever
what about when it comes to tires?
buy 3 tires and get 4th free
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Old 10-04-2022, 11:39 PM   #11
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maybe because you only need one per car ?

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Old 10-05-2022, 12:00 AM   #12
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when redblocks on the road where more common, like the mid 90s, Costco sold them in 10 packs
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Old 10-05-2022, 12:18 AM   #13
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Kirkland Signature Swedish Car Product?
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Old 10-05-2022, 12:28 AM   #14
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Kirkland Signature Swedish Car Product?
NOS Rare Price Club Costco Kirkland volvo thermostat housings
Pack of 10

$395
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Old 10-05-2022, 01:32 AM   #15
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have they actually corroded enough (being aluminum alloy) to leak though for any of you?
Yes. I have come across plenty of redblocks with weeping thermostat housings because of deep pits in the o-ring surface of the housing. Also, plenty of redblocks with the o-ring set in RTV because the PO was attempting to stop the leak. It usually doesn't work very well doing that.
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Old 10-05-2022, 11:27 AM   #16
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My favorite is when the housing corrodes to the two long studs that hold it down to the head. That in turn can lead to the nuts on the studs seizing. Classic Volvo fun.
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Old 10-05-2022, 03:56 PM   #17
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Quote:
Originally Posted by 2manyturbos View Post
Yes. I have come across plenty of redblocks with weeping thermostat housings because of deep pits in the o-ring surface of the housing. Also, plenty of redblocks with the o-ring set in RTV because the PO was attempting to stop the leak. It usually doesn't work very well doing that.
The RTV is a temporary fix at best.
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Old 10-05-2022, 04:06 PM   #18
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Quote:
Originally Posted by dl242gt View Post
My favorite is when the housing corrodes to the two long studs that hold it down to the head. That in turn can lead to the nuts on the studs seizing. Classic Volvo fun.
I have encountered a few of those as well. The housing didn't even need the nuts to hold it on. It was completely fused to the studs via corrosion.
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Old 10-06-2022, 12:10 AM   #19
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Hey running tap water is fine… **** you next guy

Distilled water only
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