#1891344 - 10/23/09 06:08 PM
thermostat housing won't seal!!!!!!
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n00b
Registered: 01/06/09
Posts: 44
Loc: Silver lake.....WA
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I replaced my thermostat 180 and also got a new thermostat housing and o ring.i put it all back toghter and it leaking out between the manifold and housing have taken it apart numerous time and it won't seal any suggestions.Composite manifold and i don't think it cracked?????????
_________________________
2000 CVPI Former Seattle PD Supivisors 72000 Miles
J-Mod,Zip tube,R-1 rotors and performance friction pad's,Track-lok c kit clutches 3.73 gears,hole sawed air box,Instaled Henious control arm's 7/30/2010!
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#1891348 - 10/23/09 06:11 PM
Re: thermostat housing won't seal!!!!!!
[Re: mentalheaded]
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less is more�
Poobah
Registered: 08/30/04
Posts: 6447
Loc: Moses Lake, WA
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Take a closer look. Are you sure it is not cracked?
_________________________
-Colton  2002 Ford Crown Vic PI, 201k "Highwayman" (Ex-Kootenai County, ID Unit #42) - Down for bad engine 2003 Ford Crown Vic PI, 103k "Th-wacker"
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#1891438 - 10/23/09 08:48 PM
Re: thermostat housing won't seal!!!!!!
[Re: Colt45]
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Over the Hill
Registered: 07/19/02
Posts: 4485
Loc: Democratic Rep. of Southpaw
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When I took my thermostat out, I could see that the support had receded further into the housing and would no longer support the thermostat flange to provide a seal. It was easy to see that it was cockeyed when I was looking for the problem. I would bet you have the same problem. Mine got worse when I took it off and tried to seal it again. At first, it sealed itself when it got warm.
There is no fix to this problem, that I was able to conjure up, except a new manifold. Leaks tend to develop around the bolts too. I am sorry I don't have better news.
_________________________
'99 GM GS HPP.
I may not be a rocket scientist, but I *am* a scientist.
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#1891488 - 10/23/09 09:55 PM
Re: thermostat housing won't seal!!!!!!
[Re: mentalheaded]
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Over the Hill
Registered: 05/06/02
Posts: 4691
Loc: Saskatoon, Saskatchewan
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Is the new thermostat housing the same as the old one?
You put the new O ring on top of the thermostat?
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#1891772 - 10/24/09 07:17 AM
Re: thermostat housing won't seal!!!!!!
[Re: larryo340]
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Over the Hill
Registered: 04/26/08
Posts: 2950
Loc: iraq-baghdad-hell's street
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install a thicker O ring and make a gasket for the tstat hosing and put a very little RTV layer both sides if you found a crack.
_________________________
http://www.supermotors.net/users/vic1992LX 1992 crownvic LX P74 (ex US DOD unit) SOLD 2009 1998 crownvic P73 (came from canada) SOLD 2014 1990 oldsmobile cutlass cierra 3.1L FE3 WORK VEHICLE 2007 toyota yaris 1.3L wife vehicle SOLD 2011 ford edge limited 3.5L AWD flooded (lifetime project) 2012 Ford Focus 2.0L. Exciting transmission technology.
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#1893525 - 10/26/09 09:10 PM
Re: thermostat housing won't seal!!!!!!
[Re: Dentman]
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Over the Hill
Registered: 07/19/02
Posts: 4485
Loc: Democratic Rep. of Southpaw
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A thicker oring will probably just push the t-stat support into the manifold even more.
_________________________
'99 GM GS HPP.
I may not be a rocket scientist, but I *am* a scientist.
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#1893740 - 10/27/09 01:55 AM
Re: thermostat housing won't seal!!!!!!
[Re: LTDteether]
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n00b
Registered: 01/06/09
Posts: 44
Loc: Silver lake.....WA
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I appreciate all the help money is tight no work around here!I was planing on a pi manifold swap now it will be sooner than later.
_________________________
2000 CVPI Former Seattle PD Supivisors 72000 Miles
J-Mod,Zip tube,R-1 rotors and performance friction pad's,Track-lok c kit clutches 3.73 gears,hole sawed air box,Instaled Henious control arm's 7/30/2010!
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#1893746 - 10/27/09 02:13 AM
Re: thermostat housing won't seal!!!!!!
[Re: mentalheaded]
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less is more�
Poobah
Registered: 08/30/04
Posts: 6447
Loc: Moses Lake, WA
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I hear you there.
_________________________
-Colton 2002 Ford Crown Vic PI, 201k "Highwayman" (Ex-Kootenai County, ID Unit #42) - Down for bad engine 2003 Ford Crown Vic PI, 103k "Th-wacker"
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#1896854 - 10/30/09 02:17 PM
Re: thermostat housing won't seal!!!!!!
[Re: chipdog4]
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Over the Hill
Registered: 07/30/02
Posts: 1005
Loc: Lubbock, TX
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Easy solution - use an OEM o-ring.
Brad
_________________________
2002 LX Sport (P74) in Silver Frost Metallic.
Mods: Edelbrock IAS shocks. Michelin MXV4 235/55/17. 700w Crossfire OFIS (Old Fart Irritation System). Airbox horn removed. Headlight relay kit. J-Mod, finally - Yay!
...and officially DOA as of 12/21/2009 due to an elderly driver who thought red lights were just an amusing suggestion.
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#1898551 - 11/02/09 12:33 AM
Re: thermostat housing won't seal!!!!!!
[Re: Brad_Johnson]
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Member
Registered: 05/16/06
Posts: 224
Loc: Billings, MT - The Last, Best ...
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Watch for a miss when it leaks from there it gets down the number 5 or 6 plug and corrodes the spring connection at the end of the COP.
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 My fleet at it's max.
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#1917967 - 11/23/09 05:06 PM
Re: thermostat housing won't seal!!!!!!
[Re: LTDteether]
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Member
Registered: 04/08/09
Posts: 405
Loc: Burke County, North Carolina
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Take a closer look. Are you sure it is not cracked? Nice ride Colt When I took my thermostat out, I could see that the support had receded further into the housing and would no longer support the thermostat flange to provide a seal. It was easy to see that it was cockeyed when I was looking for the problem. I would bet you have the same problem. Mine got worse when I took it off and tried to seal it again. At first, it sealed itself when it got warm.
There is no fix to this problem, that I was able to conjure up, except a new manifold. Leaks tend to develop around the bolts too. I am sorry I don't have better news. x3,..this is one of those times when I wished the goose neck (water inlet) had a flange around the entire surface so a man could use an O-ring AND a gasket if needed. But mine turned out to be a cracked intake. A dozen people other than myself never saw the crack, but it was there, and very apparent when my crossover shot its wad.
_________________________
 _________________________________________________________ Long View, NC P.D. Decommissioned in Dec. '08-Purchased in January, '09 with 71,200 miles, 3:55 gears, K&N, FlowMasters, Stainless tips, Dorman intake, Paint, Tuck, Kenwood head unit, Front end tuner mesh, Accel Super Coils 
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#1918126 - 11/23/09 08:43 PM
Re: thermostat housing won't seal!!!!!!
[Re: P71_Vic]
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Poobah
Registered: 01/05/04
Posts: 9450
Loc: Winchester Mass
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And this is why you DO NOT change the thermostat on a all Nylon intake unless it is massivley failing.
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2004 MarauderM79 155K miles Jmod!! Rockin Stock tune Daily, Muscle Merc tune for track 14.85 @95.63 2004 Crown Vic LX SOLD!! New Daily 2016 Dodge Charger R/T Road and track, purchase with 16K now 23K after 3 months. 5.7 Hemi, 8 speed ZF trans 3.06 open rear 13.98 @ 99.2 mph 4740 lbs with driver!! R.I.P Photobucket 10 years of hosting down the drain
Project car 74 Chevy Laguna type S-3, # match 400 SBCPrevious rides 93 P-71 2001 P-73, 94 TC Exec, 96 TC Signature, 04 LX
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