Thermostat question

[BigFish]

Have a new to me 97 sahara. Leaking at thermostat. Have read a lot of threads here about it ..learning everyday. On to question..when it says to wet a gasket with water in service manual do you soak it, dampen it or just wipe with water? Thanks

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[tworley]

I never did anything to mine. I just made sure the old gasket was removed completely by carefully using a razor blade to clean the surface.

 

[The Real Lxxtsy]

I googled online about the gasket and one guy used water to wet the gasket then installed it with the correct torque spec.

 

[The Real Lxxtsy]

if you wet the gasket and torqued to the correct spec and still leaks you might have a crack in the thermostat housing

 

[BigFish]

Thanks all... got new housing . Barely. Leaking now had to use rtv. Going to redo sometime this week

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[The Real Lxxtsy]

Thanks all... got new housing . Barely. Leaking now had to use rtv. Going to redo sometime this week

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Welcome. What part of IL are you in?

 

[BigFish]

Northern .. Midway between Aurora and dekalb


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[superduty]

If both mating surfaces are completely clean and no cracks, no RTV is needed.

I have also used a dry gasket over a dozen times..nono leaks.

I only use felpro gasket.

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[Flivver250]

I have never heard of wetting a gasket, but I am old and perhaps out of touch. I tack the gasket to a scraped clean housing and mate it up to a scraped clean block. The housing can get pitted from corrosion, replace it if so.

 

[Chris]

I never did anything to mine. I just made sure the old gasket was removed completely by carefully using a razor blade to clean the surface.

X2, I did the same thing.

 

[RaymondT]

I mentioned in another write up to dry fit the thermostat into the recess on the head and really look at it closely. I cracked two housings while torquing the premium Stant thermostat before finding out the O/D of the brass was just a few thou larger than the recess. It looked good going in and appeared to sit in properly but there was a slight overlap on the bottom where you couldn't see. It was enough to hairline crack the housings.

I lapped the O/D with some 320gr strip oxide.

 

[MaloStapalo]

Went in dry on my thermostat also. Cleaned with a razor blade .

 

[BigFish]

Am I under or over torque setting at 15 ft/lbs

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[Chris]

Am I under or over torque setting at 15 ft/lbs

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15 ft/lbs is spot on, which is just hand tight basically. No need to use a torque wrench for 15 ft/lbs. If you do, be very careful, because 15 ft/lbs is very, very little torque.

 

[CodaMan]

All bolts require a torque and they do for one of three reasons:

1) to apply an even amount of pressure over a surface (a cylinder head for instance)

2) to apply a certain amount of load to stop items from pulling apart (exhaust flanges for instance)

3) so to not over tighten and break something (a thermostat housing or its bolt)