Thread: Roush 342 thermostat housing leaky
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Old 03-27-2011, 11:13 AM
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Join Date: Jan 2008
Location: Celebration, FL
Cobra Make, Engine: Superformance #2144 with a Roush 342R (sold June 2018, but still lurking on Club Cobra)
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D111,

I had a similar issue with my Roush 342. Turns out it was a missing o-ring on the face of the thermostat housing. The gasket was there, but the o-ring was not. I installed the o-ring and the leak went away. You can get the o-ring at any parts store.
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