imported_chrimy90cx

i need some help i went to visit some friends about a hour away by highway. So im driving home everything is fine and i notice my heat shoot up i have the heater on in the car on full blast i was travvling at about 115 km/h and its liek - 15 with the windchill so i was kind of shocked. It keep going up and up so i was just about ready to pull over and its like the nedle went limp and jsut dropped back to regualr operating tempature and was fine the rest of the way home no smoke nothing the fan was working as well when i got home. Did my thermostat just stick closed or open?? i am a little nervous now as i make that commute 2 - 3 times a week and dont want to get stranded on the side of the road in this weather. its a 90 cx with d15b2 motor any help is greatly appricated.

thanks in advacne

imported_mikepasini

oem honda thermostats have a failsafe on them that closes it shut when it fails or is failing and yeah, it must of been getting hot when its this cold outside... if it is the thermostat it would make sense, but it could maybe be something else.

imported_Nate9

how's your rad condition....it happened to me last time.....changed the rad...problem fixed

Oldspower

if it did it just that one time, id say the tstat just stuck shut for some reason.

imported_Cablerat

I'm pretty sure the fail safe on thermostats open up all the way to prevent the car from overheating and potentially staying cold all the time.

If the guage is doing funky stuff, I would say something around the coolant temp sensor or the guage itself.

imported_janz3n

really? thats odd.. why would a fail safe be shutting the tstat? it would just over heat the engine... youd think a fail safe would be to keep it stuck open?

imported_chrimy90cx

hey guys thx for the info it just happened that one time the rad is full and was working fine today i wonder if something got stuck infrornt of my rad or sumpin to prevent air to hit the fins?? its was fine today anyways. thanks again

imported_InVaDeR_HB

could be a sign that ur head gasket is on its way out...

gladiator

agreed.

imported_chrimy90cx

i wnet for a drive tonite on the highway to see if it woudl do it agian. I drove for about 35-40 mins pure highway and nothing it was normal. Pure fluke i guess it was fine all day for me just sat at normal operationg temapture. No smoke at 5 k rpm out the back so i dont think its head gasket. I think i may have gotten lucky on this one. Thanks for everyones input.

imported_mikepasini

actually hondas stay closed... thats the funny thing from what i have been told IME. aftermarket fail open...

imported_janz3n

why would it stay closed? thats retarded. im pretty sure mines oem and its stuck open.

chris_si98

i have a very hard time believing this. Overheating can cause major engine damage, i can't see one good reason for any manufacter to use this...

imported_mikepasini

well, its that or they dont have a failsafe and close when they completely fail... afmk ones will stay open... i dunno, thats what the honda dealer told me.

imported_Cablerat

I think older honda thermos did not have a fail safe if anything.

Cynikal.Mindset

normal stats when they fail they fail in the closed position...thats why u pay premium for a failsafe stat that fails open to save your engine and they come with some kind of insurance that if it does fail and closes its covered

imported_mikepasini

thank you cynikal.mindset

imported_janz3n

but why the hell would someone make a tstat that has a fail safe to stay closed... its not really a fail safe if it its closed.. thats just retarded. i dont think the honda guy knows what hes talking about.. and if he does then honda make a horrible stupid mistake.

kwikb16a2

LOL...easy there ebay boy

Cynikal.Mindset

its not a failsafe unless its a failsafe stat...normal stats dont have a failsafe...mike worded it wrong and just confused y'all