Thermostat

[frosst421]

Is a 160°performance thermostat ok to use in my marauder? I mean itll keep the engine cooler wont it?

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[RF Overlord]

No, it won't. Plus, cooler is not better...engines are most efficient and have lower wear at the temperature the manufacturer designed. In addition, you'd need to be tuned for one that low.

[RubberCtyRauder]

what RF said...thermostat needs a tune if not stock which i think is 192. a 180 may be of some use if tuned for it.

[Zack]

The only thing you 'tune' for is changing the temperature the cooling fan turns on. THATS IT

[fastblackmerc]

I run a Reisch Performance 170 stat. Marty modified his tune for it. I get consistent temps between 170 & 178.

https://reischeperformance.com/

Good info on cooling system in general, why a low temp stat, 160 vs 170 vs 180 stats, 4.6DOHC refill / burp procedure, more ways to improve your cooling system and tuning parameters.

[RF Overlord]

stock which i think is 192. The factory thermostat is 188°, so it's already several degrees cooler than any Crown Vic or Grand Marquis. The problem is that parts store computers think the MM is just a fancy GMQ and don't realise there's a difference.

[GoldPanther]

If your engine never reaches the correct engine temperature, the computer will retard the transmission shift points and sometimes the overdrive will not fully engage and it will waste more gasoline. I thought that with a tune you could correct this but no.

[Keith]

fastblackmerc,

Thanks for that link. That is indeed a great writeup on lower temp 'stats. Sounds like Reisch know their stuff.

Ditto everyone on this thread. I learn so much from this forum. Getting a Marty tune soon for stock '04 and now I know what to plan for.


Keith in Houston
-04 DTR