sr5 coolant gauge issue

Motomeister · 10-18-2009, 11:13 AM

did a search around and others that had similiar problems but no solutions. the temp gauge pegs out like 30 seconds after starting from dead cold but the truck isn't overheating. looks like some sort of common problem with sr5's?

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vital22re · 10-18-2009, 11:32 AM

you try replacing your coolant temp sending unit/sensor?

Motomeister · 10-19-2009, 11:39 AM

where would this be located? on top of the thermostat housing im assuming?

my-4x4 · 10-20-2009, 12:17 AM

you could possibly have a bad ground...

Motomeister · 10-24-2009, 09:02 AM

Quote:

Originally Posted by my-4x4

you could possibly have a bad ground...

hmm, is there a easy way to check this? go from the sending unit(at the thermostat) to the gauge? kinda new to electrical troubleshooting but understand the basics

874runnersr5 · 10-24-2009, 09:10 AM

Search, theres a thread. You need to get a differnt type of thermostat that has a little hole in it to allow coolant thru all the time or something along hte lines of that.

4Crawler · 10-24-2009, 10:08 AM

Quote:

Originally Posted by Motomeister

did a search around and others that had similiar problems but no solutions. the temp gauge pegs out like 30 seconds after starting from dead cold but the truck isn't overheating. looks like some sort of common problem with sr5's?

Yep:
- http://www.4crawler.com/4x4/CheapTri...tml#Thermostat

Quote:

TSB: 029032787 22R-E Engine Temperature Overshoot

It says:

Some 1984 pickup trucks and 1983-1984 Celica models, equipped with 22R-E engines, may experience a condition called "temperature gauge overshoot". After starting a cold engine the temperature gauge will indicate a higher than normal engine temperature for a short time just prior to the thermostat opening. After the thermostat opens, the temperature gauge will return to the normal range. A new double valve thermostat has been made available to reduce temperature gauge overshoot.

And calls for part number 90916-03070 which according to the TSB replaces 90916-03055.

Happened on my '85/SR-5 and the t-stat listed fixed it 100%.

Motomeister · 10-24-2009, 10:13 AM

Quote:

Originally Posted by 4Crawler

Yep:
- http://www.4crawler.com/4x4/CheapTri...tml#Thermostat

Happened on my '85/SR-5 and the t-stat listed fixed it 100%.

its not a problem of overshooting. it goes from dead cold to hot and doesn't fluctuate at all after that.

874runnersr5 · 10-24-2009, 10:17 AM

It could also be the gauges.. since the sr5 gauges arent the best...

4Crawler · 10-24-2009, 10:17 AM

Quote:

Originally Posted by Motomeister

its not a problem of overshooting. it goes from dead cold to hot and doesn't fluctuate at all after that.

OK, then grab the Factory Service Manual, it has a page or two of testing the gauge and the sender.

Motomeister · 10-24-2009, 10:27 AM

Quote:

Originally Posted by 4Crawler

OK, then grab the Factory Service Manual, it has a page or two of testing the gauge and the sender.

wow, thanks man. never seemed to look into that section of the FSM... i think this will helm me tremendously. ill post up what i find.

Motomeister · 10-26-2009, 11:32 AM

sending unit for the gauge is a single wire unit? it wouldn't shock me if you told me the wire going to this sensor was green??

Motomeister · 11-18-2009, 02:07 PM

so my gauge does not ohm out properly. how do i go about replacing just the gauge?

10-18-2009, 11:32 AM	#2 (permalink)
vital22re Registered User Join Date: Feb 2006 Location: kirkland washington Posts: 679	you try replacing your coolant temp sending unit/sensor? __________________ 92 toyota truck 3.4 5spd 4.56 gears magna flow cat and muffler2 1/4 piping isr mod to intake 1.5 bjsfront add a leafs and 2inch lift shackles rear rancho shocks all around sitting on 265/75/r16 nitto terra grapplers

10-19-2009, 11:39 AM	#3 (permalink)
Motomeister Registered User Join Date: Dec 2008 Location: Bay Area, CA Posts: 72	where would this be located? on top of the thermostat housing im assuming? __________________ 1985 SR5 Pickup 22RE bone stock with the exception of a stereo and 31x1050x15 BFG's

10-20-2009, 12:17 AM	#4 (permalink)
my-4x4 Registered User Join Date: Aug 2008 Location: Montana Posts: 101	you could possibly have a bad ground... __________________ -'87 4x4 22r fairly stock. -Thrush glasspack -Hurculined cab floor -SR5 Gauge swap -'84 4x4 22r STOCK -32x11.5 BFG M/T -Magnaflow exhaust USAF Confinement Officer

10-24-2009, 09:10 AM	#6 (permalink)
874runnersr5 Registered User Join Date: May 2008 Location: Calgary, AB Canaduh Posts: 2,784	Search, theres a thread. You need to get a differnt type of thermostat that has a little hole in it to allow coolant thru all the time or something along hte lines of that. __________________ 87' 4runner Sr5 : 22re : 5spd : 32x11.5 BGF Km2 : Cragar 15x8 soft 8s : TG Rock Defense Front Bumper : Sirius radio : Optima Red Top : Pioneer system : Engnbldr tchain kit : Downey 3" leafs : Diff breather : Tube doors : Bikini Top Calgary Toyota Association I <3 my Toyota

10-24-2009, 10:17 AM	#9 (permalink)
874runnersr5 Registered User Join Date: May 2008 Location: Calgary, AB Canaduh Posts: 2,784	It could also be the gauges.. since the sr5 gauges arent the best... __________________ 87' 4runner Sr5 : 22re : 5spd : 32x11.5 BGF Km2 : Cragar 15x8 soft 8s : TG Rock Defense Front Bumper : Sirius radio : Optima Red Top : Pioneer system : Engnbldr tchain kit : Downey 3" leafs : Diff breather : Tube doors : Bikini Top Calgary Toyota Association I <3 my Toyota

10-26-2009, 11:32 AM	#12 (permalink)
Motomeister Registered User Join Date: Dec 2008 Location: Bay Area, CA Posts: 72	sending unit for the gauge is a single wire unit? it wouldn't shock me if you told me the wire going to this sensor was green?? __________________ 1985 SR5 Pickup 22RE bone stock with the exception of a stereo and 31x1050x15 BFG's

11-18-2009, 02:07 PM	#13 (permalink)
Motomeister Registered User Join Date: Dec 2008 Location: Bay Area, CA Posts: 72	so my gauge does not ohm out properly. how do i go about replacing just the gauge? __________________ 1985 SR5 Pickup 22RE bone stock with the exception of a stereo and 31x1050x15 BFG's

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