Behr is a quality part. Lets not forget it seems the genuine F part has a high incidence of failure. Whatever you end up putting in the car, use an OBD2 scanner to get data and see what the computer "thinks" the temp is. That's what matters in terms of engine management.
I forgot I bought some software to do just that on my laptop. Monitor engine sensors in real time. If only I had the time!
To finish this discussion, is the OEM Thermostat 190F? I had a very good conversation with an OEM supplier (not Ricambi yet) today and need to confirm the OEM temp.
Correct. Roughly: 82C = 180 F 88C = 190 F I just want to make sure that 190 is indeed the proper temp. On a side note...... In talking to several folks about this the past two days, the most interesting comment came from a parts supplier that I have had success with in the past. They offer both styles. They asked if I wanted OEM or aftermarket. I asked if the aftermarket one was 82C and he said yes. I asked if the OEM was 190...he said he thought so. Then he told me the pricing... $52 for the aftermarket and $210 for the OEM. He said most guys just go with the less expensive aftermarket and call it close enough. Hummmmmm Wonder how many of these aftermarket ones are running around out there messing up Gothspeeds poll?
OK. I admit I am now confused. The WSM Section B Page 87 is pasted below. Opens at 190.4 (88c) Closes at 179.6 (8cC) So the temp stamped on a thermostat means what???? Open temp? Close temp? Image Unavailable, Please Login
I would interprete any number on a thermostat to be of the opening temperature. One always assume a thermal hysteresis to be built in to the design such that the closing temperature is lower than the opening temperature. Great if it has 2 numbers stamped.
I think I read that paragraph incorrectly. The temps listed are ofor the thermotime switch for the fans....not the thermostat. That's what I get for doing something before my first cup of coffee.... Sorry for that public brain fart.
The original GENUINE part that came in these cars from the factory? I've never had a problem with them and they have lasted a long time. Since Maranello Concessionaires took over(under licensing of course) all spare parts for the F355 I've been very disappointed in the quality of the parts....some are absolute garbage. Some of the now "so called" factory parts(hey, they even come in a ferrari box and are called genuine) are not even close to OE/OEM......the BEHR t-stat is one of them. The t-stat is a mechanical part and can be easily checked before installation........it is getting pretty bad when the shop or DIY'er has to do quality control for the mfg company. Wonder why a quality shop charges a little more.....because they take the time to do it right. Parts? It's all about the money/profit the people can make, and Roger Penske(Maranello Concessionaires) is pretty darn good at it. Quality? This word is now almost synonymous with the word "nonexistent".
Randy, what did you end up doing for a thermostat? I'm thinking it may not be a bad idea to change mine given what I've read. Did you stick with the less expensive version from GT parts and did it test ok?
I received a genuine, albeit very lightly used, one from Bruce at a very attractive price (he sent it to me for free...no ****. The brotherhood lives on) The old one is sitting here, but I have no idea how old it is. It worked, but it may be original for all I know. Still have the GT car parts one if you think that is the right direction for you.
Randy, thanks for sending the thermostat. I just did the boil test and it opens at 200 degrees. It sounds like that's not good? I'll have to pull my old thermostat and test that one.
so can this mean the fuel mapping can be more lean/richer then should be? due to the incorrectly functioning thermostat. curious as I'm still trying to diagnose a moderate rough idle. someone posted some excellent tips in another thread. but I'm also thinking if my thermostat is faulty the engine ecu could be adjusting the fuel trim incorrectly and possibly being a contribution to rough idle.
That situation has played out over and over for every model. I'd like to be able to blame it on RP but it was going on long before him. The fact is once MC is the supplier no telling what you will get.
