I finally got the LX back together today,I fitted a new Chrome Redline Thermostat Housing( the old had corroded a bit) I tightened the bolts on the housing down and began filling the coolant in the radiator,in my stupidness I kept filling the radiator then noticed coolant was leaking somewhere?. It was PISSING put of that Redling Thermostat Housing!!, from memory the old one was ok and didnt leak?. I have lost half or more ? of the Toyota Coolant I put in!! ....GRRRRRR
Are these particular housings renown for leaking,are some of them sent out of the factory warped perhaps?, Can you use the paper gasket and silastic on these housings( I suspect the Silastic wont stick to the chrome surface?) or maybe run a bead of Silastic on the Housing's O - Ring??.
12 replies to this topic
#2
_UCLX_
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Posted 29 December 2012 - 11:08 PM
Don't know about the Redline housing, but I had no end of trouble getting my genuine LX housing to seal to the valley cover. The issue turned out to be the coolant eating the gaskets & sealant. Cured the problem by eliminating the gasket, and using a VERY light smear of RTV black silicone. I used the long life Holden coolant.
I have been advised that the Holden & Toyota coolants are near enough the same formulation. The coolant in my LX is due to be changed in mid 2013.
Won't be re-using Holden or Toyota long life coolant, will find an alternative, even if it's the normal 3 year Tectalloy product.
Cheers,
Daryl.
I have been advised that the Holden & Toyota coolants are near enough the same formulation. The coolant in my LX is due to be changed in mid 2013.
Won't be re-using Holden or Toyota long life coolant, will find an alternative, even if it's the normal 3 year Tectalloy product.
Cheers,
Daryl.
#3
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Posted 29 December 2012 - 11:18 PM
Check the OD of the thermostat flange. It may be too big and not sitting properly in the recess in the manifold. This could be preventing the thermostat cover from clamping down properly to compress the O-ring onto the manifold.
#4
_76S.L.R_
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Posted 30 December 2012 - 12:15 AM
Don't know about the Redline housing, but I had no end of trouble getting my genuine LX housing to seal to the valley cover. The issue turned out to be the coolant eating the gaskets & sealant. Cured the problem by eliminating the gasket, and using a VERY light smear of RTV black silicone. I used the long life Holden coolant.
I have been advised that the Holden & Toyota coolants are near enough the same formulation. The coolant in my LX is due to be changed in mid 2013.
Won't be re-using Holden or Toyota long life coolant, will find an alternative, even if it's the normal 3 year Tectalloy product.
Cheers,
Daryl.
The Coolant was eating away at the Gaskets and sealant!?, do you know this for sure?.
I checked the Thermostat and it sits in the recess pefectly,I checked the thermostat housing with a straight edge and looks to be fine( not warped))
#5
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Posted 30 December 2012 - 06:07 AM
Another way to test the thermostat housing is to sit it on a sheet of glass and see if you can slide a feeler gauge under it. Otherwise you possibly caught the thermostat between the housing and manifold when you bolted them up and didnt notice? I've been guilty of that one.
#6
Posted 30 December 2012 - 06:39 AM
I tried one of those Redline housings for a while, it just kept warping no matter what I did. Sanded it flat several times which stopped the leak for a bit but it would soon start up again. Tried it with the O ring and with gaskets, it just warped so far it couldn't seal. Switched back to an alloy housing to match the alloy manifold and no issues.
#7
_76S.L.R_
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Posted 30 December 2012 - 11:36 AM
I'll have to do away with it then and go buy a factory stock housing then, I paid nearly $50.00 for that damn Redline one!
#8
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Posted 30 December 2012 - 07:14 PM
Have a redline one on my engine they are prone to being not real flat from production !! Take o ring out use a good grade silicone Three bond 333. Grab a nice new flat file and file BOTH mating surfaces flat !!! No problem in 20 years !!!!!!
#9
_sjp67m_
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Posted 30 December 2012 - 08:02 PM
Sandpaper on flat wood and run the thermostat housing in a figure 8 and check the housing to see if all of it has been in contact with the sandpaper ( see if it's straight)
#10
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Posted 30 December 2012 - 08:09 PM
I'm using the redline housing, and I just use a bit of silicone & the o-ring, and not had a problem.
#11
71xu1
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Posted 30 December 2012 - 09:44 PM
Dont know how true it is but I was told that the thermostat housing is supposed to be sacrificial. When putting a chromed one on I was told to scratch the inside surface with a file to expose the aluminium. When I did the rebuild on my cooling system the radiator place told me not to put in antifreeze type coolant because of it eating bits away and getting under hoses and clamps causing them to swell and why bother with antifreeze in WA. Instead he recommended just coolant.
Cheers Dave
Cheers Dave
#12
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Posted 30 December 2012 - 10:14 PM
Dont know how true it is but I was told that the thermostat housing is supposed to be sacrificial. When putting a chromed one on I was told to scratch the inside surface with a file to expose the aluminium. When I did the rebuild on my cooling system the radiator place told me not to put in antifreeze type coolant because of it eating bits away and getting under hoses and clamps causing them to swell and why bother with antifreeze in WA. Instead he recommended just coolant.
Cheers Dave
Well indeed on the packaging for that Redline Housing it does state that the Housing is like a sacrificial Annode similar to that in boats!,Couple of things I found today = the housing holes were a bit out of whack so the housing was not in the right position and the thread of one of the holes in my intake Manifold was pretty much screwed up!,I elongated a hole in the Thermostat Housing,cleaned the surfaces with sandpaper, cleaned them plus re-threaded the buggered hole to accept a 10mm bolt instead of 3/8",I put a small bead of the blue coolant resistant Silastic on the O-Ring and tightened down. I have to go buy more coolant tomorrow and try again.....
#13
TerrA LX
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Posted 31 December 2012 - 07:34 AM
Dont know how true it is but I was told that the thermostat housing is supposed to be sacrificial. When putting a chromed one on I was told to scratch the inside surface with a file to expose the aluminium. When I did the rebuild on my cooling system the radiator place told me not to put in antifreeze type coolant because of it eating bits away and getting under hoses and clamps causing them to swell and why bother with antifreeze in WA. Instead he recommended just coolant.
Cheers Dave
I think you mean they said to just run inhibitor instead of coolant (which is generally anitfreeze mixed with inhibitor) and yes they are spot on.
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