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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Industry News & Whispers
Discussion:  Toyota overheating
Number of messages: 28
Page: [1] 2
START MESSAGE:
henry_h
Louisiana, United States 		Applications have numerous Toyota [7 series] IC LP units that overheat in hot environments [Southern USA].  Toyota has made recommendations but the fixes[recommendations] and costs are not covered.  THe other brand used does not overheat and uses less fuel.  Anyone else with this problem?

Posted 10 Dec 2004 00:21 AM Reply  Report this message
REPLIES: Sort replies by
Scout
Alberta, Canada 		I am in a northern climate and the Toyotas here have the same problem, I know of several facilities where the local dealer has either drilled holes in the cowl or has cut out squares and riveted vents to try to manage the heat.

Posted 10 Dec 2004 01:22 AM Reply  Report this message
Liftman
South Carolina, United States 		A poor cooling system design is the issue.
When you start using automotive type components it does not help either.
When I see a lift with holes and slots cut out in an effort to cool a machine down it is very evident the manufacturer has a poor design.
If you can tell me what the unit is that runs cool I can thell you the differences in the two systems.
Posted 16 Dec 2004 11:49 PM Reply  Report this message
henry_h
Louisiana, United States 		Nissan.

Posted 17 Dec 2004 00:24 AM Reply  Report this message
Liftman
South Carolina, United States 		The Toyota has a real problem with the cooling system design for several reasons.
Air Flow and Radiator Style are the biggest.

The Nissan and TCM both have Nissan Engines, High Volume Fan Blades, and a Large Fin Radiator.

Try changing the radiator to a Cotton Core,
and change the fan blade if one is avaliable.  If the muffler obstructs the flow or is too close to the radiator either move it or wrap it.  In the old days adding some Wynn's Super Cool to the anti-freeze made a world of difference.  They don't make the same product now but the local Wnyy's distributor will know what to use if you contact them.

Posted 17 Dec 2004 07:53 AM Reply  Report this message
charlie_j
California, United States 		A cotton core radiator will help ONLY IF the unit is overheating due to radiator clogging. When a cotton core is added you actually loose some 20% cooling effiency, however it does reduce radiator maintenance ie, blowing out the radiator. I think it is most certainly an air flow problem and probably lies in the counterweight design...just like some of the older Toyotas

-------------------------
Take time to do the job right the first time, or you will have to make time to do the job over

Posted 17 Dec 2004 09:28 AM Reply  Report this message
Liftman
South Carolina, United States 		The cotton core radiator will loose cooling capacity if you use a Toyota Cotton Core as they simply removed fins.  A REAL Cotton Core Radiator has bigger fin material with bigger holes and the cooling capacity is not diminished.  The metal is what disipates the heat.  Having the existing radiator re-cored by a radiator shop and explaining your problem and wat you want done to the radiator shop deals with that issue.  I have yet to see an automotive radiator in an industrial application NOT clog up.  Also keeping the corners inside the fan shroud clean is imperitive as you loose 30% of your cooling capacity when the corners are clogged.   Like I said and Charlie confirmed, air flow is critical as well and overcoming a poor design is tough.
By the way, the newer Nissans are not going to have the same good results as the old ones due to all their changes I am told.

Posted 18 Dec 2004 00:05 AM Reply  Report this message
Scout
Alberta, Canada 		I disagree on the comment on the new Nissan's, the changes to the new Nissan are not simply cosmetic and shape.  This new engine has significant improvements, they changed the routing of the coolant flow to create a more even temperature dispersion, the water pump and fan blades have been modified to increase coolant and air flow.  This engine through managing heat, has provided some astoundingly low emissions, and fuel consumption while increasing performance substantialy.
If you don't believe me, try a fuel consumption test, it will blow your mind.

Modified 18 Dec 2004 02:28 AM
by poster. 		Reply  Report this message
henry_h
Louisiana, United States 		Have quite a few New L model Nissan's with "0" heating issues; unless you had an example of heating issues why would you suggest they do?   Also have older Hysters that do not overheat, only the Toyota's.

Posted 18 Dec 2004 02:48 AM Reply  Report this message
Scout
Alberta, Canada 		I have found the same thing here, Hysters Toyotas and Nissans all at the same location, only the Toyota's overheat.   All forklifts have quirks, Toyota's seems to be heat management.

Posted 18 Dec 2004 04:11 AM Reply  Report this message
Liftman
South Carolina, United States 		Glad to hear you are having good results.
As I said, I heard they would not be as good, I have not had any experience with the new units.
I would not call Overheating a quirk but more a problem and it can be a very costly one if you are the one who has to pay the bill and try to run a company with all that that includes.
Unfortunatly the Hysters here are not getting very good results and also have overheating issues and require holes and slots in the hoods to try to minimize the issue.
Posted 18 Dec 2004 04:19 AM Reply  Report this message
charlie_j
California, United States 		Listen to Liftman, check those corners under the shroud. Also, there is a dead air space directly in front of the fan hub that will clog and will go undetected. The radiator that LOOKS clean is not always clean and can sometimes only be detected when removed. Nevertheless, I think you have an air flow problem

-------------------------
Take time to do the job right the first time, or you will have to make time to do the job over

Posted 18 Dec 2004 11:44 AM Reply  Report this message
Gordo
Alberta, Canada 		Have numerous customers with the new L series Nissans, not only getting raves about power and fuel efficiecy but have 0 over heating issues and 0 warranties to date. They have certainly raised the bar.

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The bitterness of a poor repair remains long after the sweetness of low price is gone.

Posted 22 Dec 2004 07:12 AM Reply  Report this message
vic_k
Ayrshire, United Kingdom 		There are many reasons for overheating, some of which are covered in the previous discussions.  Standard checks are fan belt, radiator cleanliness, fan shroud engagement and radiator cap for sealing.  However, it is very important to keep the coolant mixture at the right concentration all year round, ensure that the transmission clutches are not slipping (operator driving practice?) and that if an attachment is fitted, the hydraulic flow from the truck might need to be reduced through a flow divider.  Advancing  timing slightly can also help significantly.

Posted 22 Dec 2004 07:31 PM Reply  Report this message
vic_k
Ayrshire, United Kingdom 		There are many reasons for overheating, some of which are covered in the previous discussions.  Standard checks are fan belt, radiator cleanliness, fan shroud engagement and radiator cap for sealing.  However, it is very important to keep the coolant mixture at the right concentration all year round, ensure that the transmission clutches are not slipping (operator driving practice?) and that if an attachment is fitted, the hydraulic flow from the truck might need to be reduced through a flow divider.  Advancing  timing slightly can also help significantly.

Posted 22 Dec 2004 07:31 PM Reply  Report this message
charlie_j
California, United States 		I was able to confirm with some contacts on the inside at Toyota they did indeed have a counterweight design issue on a couple of the 7 series models. I would suggest anyone having cronic overheating problems on these units contact their dealer and discuss this issue with them

-------------------------
Take time to do the job right the first time, or you will have to make time to do the job over

Posted 23 Dec 2004 09:43 AM Reply  Report this message
loyd_t
Connecticut, United States 		Gentlemen,

I am fully aware of the overheating problems that have occured with the Toyota and Nissan trucks.  I have found a solution to the problem which is using a coolant manufactured by Evans Cooling.

Posted 3 Jan 2005 09:30 AM Reply  Report this message
Liftman
South Carolina, United States 		Can you give us the details on the Evans Cooling product?  I have not heard of it but it sound like old Wynn's Super Cool which was effective in the late 70's.

Posted 3 Jan 2005 11:49 PM Reply  Report this message
loyd_t
Connecticut, United States 		The Evans NPG product is a waterless coolant, which besides being non-toxic, has a boiling point of 375 degrees vs. 260 degrees wih the standard coolant.  It is a lifetime coolant as well.  The coolant was tested in Yuma AZ by the army and will now be used in all new humvees manufactured for the armed forces starting this month.  Has very good application in diesel trucks as well.

Posted 4 Jan 2005 01:03 PM Reply  Report this message
loyd_t
Connecticut, United States 		The Evans NPG product is a waterless coolant, which besides being non-toxic, has a boiling point of 375 degrees vs. 260 degrees wih the standard coolant.  It is a lifetime coolant as well.  The coolant was tested in Yuma AZ by the army and will now be used in all new humvees manufactured for the armed forces starting this month.  Has very good application in diesel trucks as well.

Posted 4 Jan 2005 01:03 PM Reply  Report this message
Page: [1] 2


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