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+--- Thread: 2.3 DOHC motor - correct operating temp (/thread-2-3-dohc-motor-correct-operating-temp)
RE: 2.3 DOHC motor - correct operating temp - fixkick - 08-08-2019
if the side coolant tank RAD overflow tank stays level mark every overnight parked, next AM level is at mark, same, there is no air in the system.
The cap sucks in coolant every night, from THERE.
and opposite driven.
so if the level is ok , day by day (AM wakeup, look hood up) you did the bleed OK, (im sure you know that but here it is)
RE: 2.3 DOHC motor - correct operating temp - fixkick - 08-08-2019
the surge, J18.... (some grown men cry, and for good reasons)
yes, its a really silly thing this, reverse flow. stat system.
lets say engine fully hot,
the 22 tube is plugged. or 1/2 way. or heater core missing and bypass hose too.?
the 22 very hot water, does not land on the wax puck now. (very bad this)
the thermostat will falsely close due to water temps too low at wax puck.
then the pump and engine start to roast, super hot and that hot water backs up to the WAX (via pump housing from HEAD jackets)
the wax feels (if you will) the super hot back flow of hot water and slams full open.
then that very cooler now super cool water for sure moving fast, the cold water hits the WAX and slams shut again.
this is the J18 surge from hell, deal.
a real pain that. and will happen when you never want it to happen. may seem ok at first, due to this CHAOS setup.
i see no OBD2 data at all , showing water temps SURGING, only rising, best I can tell.
it even runs too hot even with 02 sensor showing super perfect trim......
end surge , cause.topic.
RE: 2.3 DOHC motor - correct operating temp - thebanjoman - 08-12-2019
(08-08-2019, 02:31 AM)fixkick Wrote: the surge, J18.... (some grown men cry, and for good reasons)
yes, its a really silly thing this, reverse flow. stat system.
lets say engine fully hot,
the 22 tube is plugged. or 1/2 way. or heater core missing and bypass hose too.?
the 22 very hot water, does not land on the wax puck now. (very bad this)
the thermostat will falsely close due to water temps too low at wax puck.
then the pump and engine start to roast, super hot and that hot water backs up to the WAX (via pump housing from HEAD jackets)
the wax feels (if you will) the super hot back flow of hot water and slams full open.
then that very cooler now super cool water for sure moving fast, the cold water hits the WAX and slams shut again.
this is the J18 surge from hell, deal.
a real pain that. and will happen when you never want it to happen. may seem ok at first, due to this CHAOS setup.
i see no OBD2 data at all , showing water temps SURGING, only rising, best I can tell.
it even runs too hot even with 02 sensor showing super perfect trim......
end surge , cause.topic.
OK Today I pulled everything apart and checked ALL the external tubes and hoses.
I found NO obstructions on any of the pipes. 1, 22, 19,
I replaced the thermostat with a Stant and even replaced the water pump too. The one I replaced it with had impeller 'fins' about 1/4" longer.
I forced water into hose #19 and it came out 22 at the thermostat. I spend 1/2 hour with the front of the vehicle jacked up with the tires about a foot off the ground to make sure I could get all the air out. I went for a ride and recorded the temps and they still are showing high but nothing over 235 now.
So I feel confident that all the 'plumbing' is working as it should. So the next step is to order a 3 row aluminum aftermarket radiator.
I found one.
https://www.ebay.com/itm/3-core-aluminum-radiator-for-Suzuki-Grand-Vitara-SQ-JLX-2-0-2-5-V6-1995-2005/122213032994?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160811114145%26meid%3Db10dd2281c3c469ca14eec3308231dee%26pid%3D100667%26rk%3D3%26rkt%3D8%26sd%3D133053038436%26itm%3D122213032994%26pg%3D2045573&_trksid=p2045573.c100667.m2042
It'll be here Aug 20 and I will install and repeat the whole process. The 3 rows will push the fans back closer to the engine but there is still going to be about 3 inches of space.
RE: 2.3 DOHC motor - correct operating temp - fixkick - 08-15-2019
wow that is one nice RAD>
good to hear it fits with 3"left. very good.
what you are doing is common with TURBO kits, a huge RAD.
A typical turbo does 2x HP increase and 2x more heat. 6psi boost? IIRC.
a turbo guy would know what to do and 250F coolant temps are NO GOOD.
I wish lots of luck and success in your project,
if your car was Chevy the PCM would start dropping off cylinders that hot... (created in the first Corvettes with this)
they cut injection to do that.magic. on 1 cylinder then more, if need be.
pure genius that ....
happy trails ! and Cheers.
RE: 2.3 DOHC motor - correct operating temp - thebanjoman - 08-15-2019
(08-15-2019, 12:57 AM)fixkick Wrote: wow that is one nice RAD>
good to hear it fits with 3"left. very good.
what you are doing is common with TURBO kits, a huge RAD.
A typical turbo does 2x HP increase and 2x more heat. 6psi boost? IIRC.
a turbo guy would know what to do and 250F coolant temps are NO GOOD.
I wish lots of luck and success in your project,
if your car was Chevy the PCM would start dropping off cylinders that hot... (created in the first Corvettes with this)
they cut injection to do that.magic. on 1 cylinder then more, if need be.
pure genius that ....
happy trails ! and Cheers.
It'll take couple of weeks to get the radiator. While I wait I will continue to review and test.
I am going to change from the 2 10" fans (1750CFM) to a single 16" fan (3000CFM) to see if it makes any difference in the overall cooling.
What could it hurt.. If the 16" provides improvement I will use the 2 10" fans for another project to build a cooling system and water collection from my 80 gal air compressor so stuff will get used.
What could it hurt? Nothing at this point.. I may learn even more.
RE: 2.3 DOHC motor - correct operating temp - fixkick - 08-24-2019
that CSV file, on PCM logs show ECT temps vastly more steady. a good sign that is.....
RE: 2.3 DOHC motor - correct operating temp - fixkick - 08-24-2019
3000 CFM , now that is one hot fan.
only hurt is noise.
and later of that is and issue, an fan modulator to control it only when need be, "RED LIGHTS/stop signs"
nice project this is and for sure the 2.3L J23. SHOE HORNED IN. NICELY.
RE: 2.3 DOHC motor - correct operating temp - fixkick - 09-04-2019
let me say things for sharing CSV, nothing can be better, logging OBD2,
some shops have OBD2 tools that allow adding aux. sensors like a thermistor (ECT#2) to the water pump housing...
RE: 2.3 DOHC motor - correct operating temp - thebanjoman - 09-23-2019
(09-04-2019, 04:44 AM)fixkick Wrote: let me say things for sharing CSV, nothing can be better, logging OBD2,
some shops have OBD2 tools that allow adding aux. sensors like a thermistor (ECT#2) to the water pump housing...
Life got in the way with family members in the hospital and such, Finally got back to the project.
3 Row radiator and Stant thermostat installed. Pulled new data and temps look much better,
Still need to do some more testing but I might have the temps under control.
RE: 2.3 DOHC motor - correct operating temp - fixkick - 09-23-2019
(09-23-2019, 07:06 AM)thebanjoman Wrote:(09-04-2019, 04:44 AM)fixkick Wrote: let me say things for sharing CSV, nothing can be better, logging OBD2,
some shops have OBD2 tools that allow adding aux. sensors like a thermistor (ECT#2) to the water pump housing...
Life got in the way with family members in the hospital and such, Finally got back to the project.
3 Row radiator and Stant thermostat installed. Pulled new data and temps look much better,
Still need to do some more testing but I might have the temps under control.
wow that looks way better, it is not wild like before just small 20f variants under some loads.
not too bad. lots of work but in the end you get a great car and good engine
cheers to you !