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Topic: Thermostat Replacement (Read 695 times) |
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
 
Posts: 1474
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Thermostat Replacement
« on: Nov 18th, 2010, 12:33pm » |
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1998 2.3 pre-face-lift. In the near future I'll be replacing the Thermostat, there are currently no issues with the cooling system except I think my thermostat is slightly stuck open. On a cold day the temp gauge hardly gets above the blue whilst driving along, as soon as I get to town the gauge goes to the middle after about 5 mins of town driving. In the summer time, not even when particularly hot the temp gauge would start to rise above the middle. The coolant is a nice clean blue colour, there are no leaks. I have purchased a Ford thermostat, and I can easily see the three bolts that need to be loosened to replace the thermostat. However, I know there is an issue with the bolts perhaps being stuck in the insert that is in-turn stuck into the manifold and can therefore end up cracking the manifold, obviously I would like to avoid that happening!
So, apart from using things like WD40 and 'Rost-Off-Ice' in an attempt to get these three wee bolts to come loose without cracking the manifold, does anyone have any 'sure-fire' way of the bolts NOT doing the damage? And, which bolt is the most likely to do the damage if there is one?
Peter
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I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: Thermostat Replacement
« Reply #1 on: Nov 18th, 2010, 3:49pm » |
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hi there
WD40 should be fine. when i done my old one, they came out ok.
just remember to keep your socket level, so all force is equal.
hth
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gozz
Senior Member
Been around awhile
Posts: 3475
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Re: Thermostat Replacement
« Reply #2 on: Nov 18th, 2010, 9:30pm » |
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PJD.
Most problems are caused by overtightening,you only need to nip the bolts up to hold the rubber ring in place.
When I do them I clamp the feed pipe from the header tank,then only a pint or two of coolant is lost.
GOZZ.
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
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Re: Thermostat Replacement
« Reply #3 on: Nov 19th, 2010, 8:06am » |
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Hi Guys
I managed to loosen all three bolts this morning before heading off to work, and then nip them back up. (Aye I'm using another car for work) Yep I'd thought of clamping the header feed pipe, and I'll be testing the new thermostat before fitting it, in the traditional way of course, and whilst the gal is out of the kitchen! 
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I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Thermostat Replacement
« Reply #4 on: Nov 19th, 2010, 11:57am » |
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It's a good idea to lay a plastic bag over the alternator, they don't particularly like having coolant poured through them.
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ABS multiplug wheel sensor pins MK IV or MK 20
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
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Re: Thermostat Replacement
« Reply #5 on: Nov 19th, 2010, 1:16pm » |
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Aha..........Thanks for that wee tip Tompion 
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IP Logged |
I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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