It's a 2 stage unit being that it's got the std thermo plunger & also a cap on the bottom. Is it spose to fully close the top section when cold as per std single type unit.
Mine is staying partly open but opening a lot further when in boiling water Engine takes a long time to get up to temp around town & the fan will engage after a longer rural drive at 100kph
tweake,
Nov 3, 12:44am
i don't think its two stage. the cap on the bottom is to close the bypass. sounds like yours is stuffed, get a new one.
mrfxit,
Nov 3, 1:21am
Yea bypass system. Not had to change 1 of these before so not sure. Doesn't seem right like it is & would explain the temp situations
intrade,
Nov 3, 5:06pm
iforce.co.nz have you got a immage?
gamefisher,
Nov 3, 11:38pm
Mine is the same always fairly low on the temperature guage and it only gets to halfway and stays there towing a trailer up a long hill. I think it needs changing but not at the top of my list to do even though an easy fix.
mals69,
Nov 4, 2:57pm
Mine too takes long time to get up to temp, like gf mine always stays low at norm temp - big old skool heavy motor takes time to warm up :)
andy61,
Nov 7, 1:30am
My Terrano 2.7 would only run at normal temp when towing a loaded trailer, got around to changing thermostat one day, now up to normal temp within minutes,and I`m sure it runs so much better now,even the heater worked better thru winter.Wish I did the thermostat when I bought it! ,Have to thank my dad for suggesting the thermostat was either stuck open or removed when he borrowed the car for a day ,but after having a Mistral with an erractic temp gauge I didnt want to think about it!.
mrfxit,
Nov 7, 3:57am
Yep done it today with an aftermarket unit. 5km (100kph) run out of town saw the temp slightly lower then it's been before when out of town & cooling faster when slowing down in to town. Fan still runs for a minute when stopping suddenly on the roadside but the fan stops very quickly when back on the road. Will be interesting next time I take it out of town
Bit of an issue sorting out which thermostat because theres 2 units listed with a different length foot thats slightly different to the OEM unit so it was testing time in boiling water & in with the calipers
tweake,
Nov 7, 2:47pm
pays to measure the foot and the length it requires for the foot to seal the bypass. some guys found some thermostats foot is a little short and doesn't close off the bypass when the thermostat opens.
checking temps is a good idea. i don't know with the nissan ones but toyotas of that era are rated as temp at start of opening while aftermarket are rated as temp when fully open.
tweake,
Nov 15, 11:22am
quick look at the book, looks like there is a few different temp ratings for the td27 and factory ones are start to open temp.
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