4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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Sounds like you have a cracked manifold THey usually crack out the t-stat housing....same thing happend to me. I thought it needed a new o-ring,, but it turned out there was a crack inside the t-stat housing.
1998 GT 5-speed..........R.I.P.
14.20 @ 98.07 My video
On my camaro, the same thing happened. After 2 new thermostats i used the rtv on the gasket and it was fine. If that doesnt work you prob do have a cracked t-stat housing or manifold like devinsteen said.
First remove the 2 bolts... remove rubber gasket and then thermostat. Put in new thermostat, put rubber o-ring/seal over it and put hose back on and tighten bolts down.... If it doesnt work something is wrong.
hes got a 99 though, so its not likely to be a crack manifold. sometimes when i change o rings i bolt em down too tight so they twist and leak. definetly unbolt it and check, and use the gasket sealer..it saves lives.
96' GT: 01 s281e motor vortech s trim aftercooled
88' Lx convertible
96' hyundai elantra
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