Thermostat housing - Page 2

griston64 · Feb 25th, 2019, 09:10

Loosened it off yesterday and re tightened. Drove to work this morning and checked it after and it seemed ok

Fingers crossed I have cured it

I've ordered some blue silicon sealant just in case

Cheers, Mark

TonyS9 · Feb 25th, 2019, 13:12

Its quite hard to get a perfect seal there after so many years or corrosion. A bit of sealant should help.

griston64 · Feb 25th, 2019, 14:02

Might have to do that as leak is back at lunchtime

Its veeeeeery slight but needs sorted !

Laird Scooby · Feb 25th, 2019, 14:43

I'd start by cleaning the recesses the 'stat and seal sit in in the housing and head to remove any corrosion/oxidisation there first Mark. Then smear the outside of the seal with some Vaseline or silicone grease (red rubber grease if you have neither of the other) and as you pop it back in, give the 'stat a twist back and forth to help the seal slide into the recess before refitting the housing.

Also a smear of copper grease on the threads will help, tighten them evenly too. That will almost certainly sort you out, even if it looks ok as it is.

If not, some sealant (Hylomar, RTV silicone or similar sealant should do it) on one or both mating faces, give the housing a bit of a wiggle as you push it home to spread the sealant more evenly then tighten the nuts/bolts.

bob12 · Feb 25th, 2019, 19:48

Hylomar is a very old established brand. Personally, as long as all mating surfaces have been cleaned up properly and using a merest smear of sealant I would never think of bothering about using a torque wrench to tighten up a termo housing. Bob

jpliddy · Feb 25th, 2019, 21:04

I just tight bolts a little bit and no problems

wrinkles · Feb 26th, 2019, 09:53

Good stuff that I use it all the time

Feb 25th, 2019, 09:10	#11
griston64 Premier Member Last Online: Apr 21st, 2024 14:28 Join Date: Jul 2012 Location: Lenzie	Loosened it off yesterday and re tightened. Drove to work this morning and checked it after and it seemed ok Fingers crossed I have cured it I've ordered some blue silicon sealant just in case Cheers, Mark __________________ V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990

Feb 25th, 2019, 14:02	#13
griston64 Premier Member Last Online: Apr 21st, 2024 14:28 Join Date: Jul 2012 Location: Lenzie	Might have to do that as leak is back at lunchtime Its veeeeeery slight but needs sorted ! __________________ V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990

Feb 25th, 2019, 14:43	#14
Laird Scooby Premier Member Last Online: Yesterday 23:44 Join Date: May 2012 Location: Lakenheath	I'd start by cleaning the recesses the 'stat and seal sit in in the housing and head to remove any corrosion/oxidisation there first Mark. Then smear the outside of the seal with some Vaseline or silicone grease (red rubber grease if you have neither of the other) and as you pop it back in, give the 'stat a twist back and forth to help the seal slide into the recess before refitting the housing. Also a smear of copper grease on the threads will help, tighten them evenly too. That will almost certainly sort you out, even if it looks ok as it is. If not, some sealant (Hylomar, RTV silicone or similar sealant should do it) on one or both mating faces, give the housing a bit of a wiggle as you push it home to spread the sealant more evenly then tighten the nuts/bolts. __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Feb 26th, 2019, 09:53	#17
wrinkles VOC Member Last Online: Apr 14th, 2024 15:55 Join Date: Jul 2013 Location: telford	Good stuff that I use it all the time __________________ 1998 945 Torslanda estate named Wendy wood dash,Half leather. rear spoiler electric front windows, wind deflectors electric mirrors and egg crate grill all fitted by me. One life live it Volvo style

Feb 25th, 2019, 13:12	#12
TonyS9 Premier Member Last Online: Apr 9th, 2024 21:44 Join Date: Jul 2009 Location: Holywood	Its quite hard to get a perfect seal there after so many years or corrosion. A bit of sealant should help.

Feb 25th, 2019, 19:48	#15
bob12 bob12 Last Online: Yesterday 11:19 Join Date: Aug 2006 Location: Woking	Hylomar is a very old established brand. Personally, as long as all mating surfaces have been cleaned up properly and using a merest smear of sealant I would never think of bothering about using a torque wrench to tighten up a termo housing. Bob

Feb 25th, 2019, 21:04	#16
jpliddy VOC Member Last Online: Feb 15th, 2024 17:04 Join Date: Dec 2006 Location: stoke on trent	I just tight bolts a little bit and no problems

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