BJ60 Overheating

randman59 · 08-10-05, 11:22 AM

Ok, I was rushed and lazy. I had a mechanic replace the waterpump, rad hoses, thermostat, install a block heater and powerflush the 3b. Afterpicking it up, the engine gets really hot (almost to red zone), then the thermostat opens and the temp drops to just over 1/2 way mark. Pulled the thermostat and tested, it seems to be opening to high, so I went to Toyota purchased another and installed it. It does the same thing! Previously, it would run between 1/4 to 1/2 zone. Any ideas? (besides going back to the mechanic, had too many problems with them).

-It was running fine before the repairs. it would go from cold to middle and then run between 1/4 - 1/2 range.
-It doesn't overheat, just goes from cold to very hot (almost red section) then back to just over half way.

1985 BJ60
3.4l 3B Diesel
Naturally Asperated
H55
340k

Deny · 08-10-05, 11:40 AM

I had similar issues with my truck when I first got it, except it was more fluctuating, and it would really freak me out. It ended up being a bad connection at the temperature sensor by the water pump, I cut off the old conector, and saudered in a simple conector, and its worked great ever since.
Just a thought.
Cheers,
Deny

randman59 · 08-10-05, 12:03 PM

I think that is a different issue. The Temp and Fuel gauges usually over-read at the same time. Mine does that as well. Thanks for the tip on how to fix that one.

Radd Cruisers · 08-10-05, 12:27 PM

Just fishing here, is it possible to put the thermostat in backwords?

Rob

David*BJ70 · 08-10-05, 02:39 PM

Maybe that can help you... specialy the post #5...

http://forum.ih8mud.com/diesel-tech-24-volts-systems/40854-thermostat-question.html

silvercrusher · 08-10-05, 06:29 PM

Since it isn't overheating it is probably ok. The spring on the t-stat is new and may take awhile to pop when its supposed to. Give it a month and see. I would put in a mech temp gauge and watch that. Those oem gauges are crap. Real gauges will save you hours of wondering.

Cheers
Challis

Diescipel · 08-10-05, 08:05 PM

What temp t-stat did you put in? Did you have an 82 degree replaced with an 88? I just replaced my 88 with an 82--down here in relatively warmer Cali the 88 would do what you describe your rig doing now, and the 82 does what you describe your temp did before the work was done. Just a thought.

B

randman59 · 08-11-05, 03:57 PM

They only sell 88 degree t-stats here. I talked to a Toyota mechanic yesterday who indicated that this is quite normal. Thanks for all the help.

Eric Winkworth · 08-11-05, 08:13 PM

What do you mean normal, does it just have to break in?

randman59 · 08-12-05, 12:13 AM

My understanding is the T-stats are slow opening when new, the spring should soften up in a while.

cruiser_guy · 08-13-05, 10:42 PM

My 88 degree stat works quite well everywhere even in Phoenix last week at 105 with the A/C running and the truck grossly overloaded!!

08-10-05, 11:22 AM	#1
randman59 IH8MUD Rookie Join Date: Aug 2005 Posts: 18	BJ60 Overheating Ok, I was rushed and lazy. I had a mechanic replace the waterpump, rad hoses, thermostat, install a block heater and powerflush the 3b. Afterpicking it up, the engine gets really hot (almost to red zone), then the thermostat opens and the temp drops to just over 1/2 way mark. Pulled the thermostat and tested, it seems to be opening to high, so I went to Toyota purchased another and installed it. It does the same thing! Previously, it would run between 1/4 to 1/2 zone. Any ideas? (besides going back to the mechanic, had too many problems with them). -It was running fine before the repairs. it would go from cold to middle and then run between 1/4 - 1/2 range. -It doesn't overheat, just goes from cold to very hot (almost red section) then back to just over half way. 1985 BJ60 3.4l 3B Diesel Naturally Asperated H55 340k

08-10-05, 11:40 AM	#2
Deny IH8MUD Lifer Join Date: Jan 2005 Location: Fort St John, BC TLCA# 11568 Posts: 1,371	I had similar issues with my truck when I first got it, except it was more fluctuating, and it would really freak me out. It ended up being a bad connection at the temperature sensor by the water pump, I cut off the old conector, and saudered in a simple conector, and its worked great ever since. Just a thought. Cheers, Deny __________________ Diesels Rule 81 BJ42 Check out my endless fix up progress at http://forum.ih8mud.com/ca-bc-peace-canyon-toyota-swamp-donkeys/152995-bj42-winter-fix-up.html

08-10-05, 12:27 PM	#4
Radd Cruisers IH8MUD Lifer Join Date: Sep 2002 Location: Vancouver Island BC Canada Posts: 3,831	Just fishing here, is it possible to put the thermostat in backwords? Rob __________________ Come and visit us in Duncan, BC www.raddcruisers.ca --> 60 Series Cable Lockers available - 4.11s or 3.70s - handles and cables included --> 12HT & H55F combos available - complete & running --> in stock and ready to go.

08-10-05, 06:29 PM	#6
silvercrusher IH8MUD Regular Join Date: Sep 2004 Location: vancouver island Posts: 345	Since it isn't overheating it is probably ok. The spring on the t-stat is new and may take awhile to pop when its supposed to. Give it a month and see. I would put in a mech temp gauge and watch that. Those oem gauges are crap. Real gauges will save you hours of wondering. Cheers Challis __________________ "it'll only take a minute to fix" 85 BJ60 all stock so far 03 VW JETTA WAGON TDI

08-10-05, 08:05 PM	#7
Diescipel IH8MUD Addict Join Date: Sep 2004 Location: 95570 TLCA# 14854 Posts: 841	What temp t-stat did you put in? Did you have an 82 degree replaced with an 88? I just replaced my 88 with an 82--down here in relatively warmer Cali the 88 would do what you describe your rig doing now, and the 82 does what you describe your temp did before the work was done. Just a thought. B __________________ Brendan 1983 BJ42 bioD, lots o' Aqualu, TIC Parabolics/DT8000s, Tuffy, 33x9.5 BFG ATs, SOLD

08-10-05, 12:03 PM	#3
randman59 IH8MUD Rookie Join Date: Aug 2005 Posts: 18	I think that is a different issue. The Temp and Fuel gauges usually over-read at the same time. Mine does that as well. Thanks for the tip on how to fix that one.

08-10-05, 02:39 PM	#5
David*BJ70 IH8MUD Addict Join Date: Jan 2004 Location: Montréal area, Qc., Canada TLCA# 15514 Posts: 943	Maybe that can help you... specialy the post #5... http://forum.ih8mud.com/diesel-tech-24-volts-systems/40854-thermostat-question.html __________________ BJ42 1982 * The Primitive Beast - wvo BJ70 1985 * The Green Machine - wvo some say The Mighty Pickle ! come on ! 1992CorollaAll-trac* The Quiet Spirit Si je dois aller en enfer... ce sera en Landcruiser (Canadian french guy (Québécois)... sorry for my english ! )

08-11-05, 03:57 PM	#8
randman59 IH8MUD Rookie Join Date: Aug 2005 Posts: 18	They only sell 88 degree t-stats here. I talked to a Toyota mechanic yesterday who indicated that this is quite normal. Thanks for all the help.

08-11-05, 08:13 PM	#9
Eric Winkworth IH8MUD Lifer Join Date: Mar 2005 Posts: 1,419	What do you mean normal, does it just have to break in? __________________ 1986 BJ70, 24v with a 3B

08-12-05, 12:13 AM	#10
randman59 IH8MUD Rookie Join Date: Aug 2005 Posts: 18	My understanding is the T-stats are slow opening when new, the spring should soften up in a while.

08-13-05, 10:42 PM	#11
cruiser_guy IH8MUD Lifer Join Date: Jan 2003 Location: Mixco, Guatemala/Cranbrook & Vancouver, B.C., Canada TLCA# 16387 Posts: 7,362	My 88 degree stat works quite well everywhere even in Phoenix last week at 105 with the A/C running and the truck grossly overloaded!! __________________ '82 BJ60 H55 tranny, AXT turbo 3B diesel, high nickel alloy head, A/C, BDS lift, factory PTO, Aussie rear locker, OEM LSD front, 4:11's, 32's, PERFECT frame! '76 FJ55, 3B turbo, alloy head, H41 tranny, 3 sp. transfer, 33's, A/C, PTO winch, long range tank! '67 FJ45LV shop project c/w 3B turbo diesel transplant & H41 4 speed, 3 speed transfer, PTO! www.wirrell.com

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