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Deere 6.8 in 750c dozer losing water. Head hasket?
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digfaster
Posted 1/3/2017 06:02 (#5740350)
Subject: Deere 6.8 in 750c dozer losing water. Head hasket?


After shutting engine off mainly, itll blow water out the overflow bottle. In the summer itll get hot on a long push but not when its cool out. Rad is clean, no water in oil and ive changed cap already. Im thinking head gasket . Common problem? Ive read theae motors were bad about liners pitting but i think id see water in the oil if that was the case. Anything else to check?
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The Pretender
Posted 1/3/2017 06:32 (#5740377 - in reply to #5740350)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


The Internet

They are "service items" on that family of engines. Been happening for years. Claas started putting their own head gaskets on them, then started fitting FPT engine instead.

 

https://thefarmingforum.co.uk/index.php?threads/jd-head-gasket-failure-causes.2958/

https://thefarmingforum.co.uk/index.php?threads/john-deeres-head-gaskets.19050/

http://www.farmingforum.co.uk/forums/showthread.php?8045-JD-head-gasket-and-other-problems

http://farmingforum.co.uk/forums/showthread.php?13341-J-D-30-series-head-gasket-issues

http://www.fwi.co.uk/community/topic/john-deere-6310-se-coolant-and-oil-help-needed/

https://thefarmingforum.co.uk/index.php?threads/cost-of-john-deere-head-gasket-repair.21731/

http://www.forum4farming.com/forum/index.php?threads/john-deere-head-gaskets.11058/

http://farmingforum.co.uk/forums/showthread.php?12852-john-deere-7430-7530

 

 

 

 

 

 

 

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JD 9400
Posted 1/3/2017 08:46 (#5740658 - in reply to #5740377)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


Southern Pa.
The Pretender - 1/3/2017 07:32

They are "service items" on that family of engines. Been happening for years. Claas started putting their own head gaskets on them, then started fitting FPT engine instead.

 

https://thefarmingforum.co.uk/index.php?threads/jd-head-gasket-failure-causes.2958/

https://thefarmingforum.co.uk/index.php?threads/john-deeres-head-gaskets.19050/

http://www.farmingforum.co.uk/forums/showthread.php?8045-JD-head-gasket-and-other-problems

http://farmingforum.co.uk/forums/showthread.php?13341-J-D-30-series-head-gasket-issues

http://www.fwi.co.uk/community/topic/john-deere-6310-se-coolant-and-oil-help-needed/

https://thefarmingforum.co.uk/index.php?threads/cost-of-john-deere-head-gasket-repair.21731/

http://www.forum4farming.com/forum/index.php?threads/john-deere-head-gaskets.11058/

http://farmingforum.co.uk/forums/showthread.php?12852-john-deere-7430-7530

 

 

 

 

 

 

 



I don't know why this family of engines has trouble with head gaskets in the UK. They certainly don't cause excessive problems here. My dealer (4 store chain) doesn't even stock a head gasket set for either of these engines. There are hundreds and thousands of those engines running in the USA. Except in applications where they are pushed beyond their mechanical limits, they are considered relatively bullet proof. I own 3 of them as we speak, and I have zero worries about any of them. Remember that the next time someone posts on here about 4.5/6.8 L engines, your supposed problems with this family of engines (thankfully) is not an issue HERE. Hopefully your problems can stay over THERE.
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WWT1370
Posted 1/3/2017 17:47 (#5741749 - in reply to #5740658)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


We have had what I would call premature head gasket failures on 2 jd wheel loaders. Both had the 6.8 engine, one only 2600 hours the other was less than that. I think it is more common than some think.
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deeretech14
Posted 1/3/2017 20:52 (#5742403 - in reply to #5740658)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?



SW Ohio
I don't know why this family of engines has trouble with head gaskets in the UK. They certainly don't cause excessive problems here. My dealer (4 store chain) doesn't even stock a head gasket set for either of these engines. There are hundreds and thousands of those engines running in the USA. Except in applications where they are pushed beyond their mechanical limits, they are considered relatively bullet proof. I own 3 of them as we speak, and I have zero worries about any of them. Remember that the next time someone posts on here about 4.5/6.8 L engines, your supposed problems with this family of engines (thankfully) is not an issue HERE. Hopefully your problems can stay over THERE.



I know of several 9570 combine owners who wished the only problem they had was headgaskets. Myself included! Glad I'm rid of that machine.
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JD 9400
Posted 1/4/2017 01:00 (#5742831 - in reply to #5742403)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


Southern Pa.
In applications like the 9570, they could easily be pushed beyond their mechanical limits, IMO. I wouldn't want a 9570 for that reason. It's asking for too much out of that engine.
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The Pretender
Posted 1/6/2017 06:36 (#5747938 - in reply to #5740658)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


The Internet

I had written and humorous response to your post, but yours disappeared and it wouldn't let me post, I can only assume that The Mothership got wind of it and wanted me stopped. Probably permanently. They are probably watching me now, in my pants, needing a shower.

But I digress.

This family of engine certainly have a reputation to uphold here. If it's not HG failure, chuck in a sprinkling of EGR issues and variably geometry turbo problems, there's even the odd snapped crank as well and one might wonder why anyone would buy one. But buy them they do. Seemingly pouring a little urea into a conveniently placed tank is more trouble than the various engine issues not doing has exacerbated. 

Ford had terrible problems here in the 1980's with porous engine blocks, they put their head in the sand and hoped it went away which killed the brand. Admittedly the engines they replaced them with would survive a nuclear attack, but the damage was done. The Mothership on the other hand has a well oiled and efficient marketing machine which means it matter not one bit what falls off these machines, people will definitely have another.

Their early Autopowr transmissions were dreadful, due, I'm told, to poor filtration. Other brands that used the same transmission had far fewer issues, but Deere did and thus all CVT/IVTs were bad which dragged the values of all brands down fitted with this type of transmission. Now they are flogging their Direct Drive as a viable alternative to a CVT, which is amusing when DD is still a fixed ration transmission just with some fancy software.

 

 

 

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KelB
Posted 1/3/2017 18:20 (#5741837 - in reply to #5740377)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?



Ayr Queensland Australia 4807

What is a FPT engine ?

The Pretender - 1/3/2017 21:32

They are "service items" on that family of engines. Been happening for years. Claas started putting their own head gaskets on them, then started fitting FPT engine instead.

 

https://thefarmingforum.co.uk/index.php?threads/jd-head-gasket-failure-causes.2958/

https://thefarmingforum.co.uk/index.php?threads/john-deeres-head-gaskets.19050/

http://www.farmingforum.co.uk/forums/showthread.php?8045-JD-head-gasket-and-other-problems

http://farmingforum.co.uk/forums/showthread.php?13341-J-D-30-series-head-gasket-issues

http://www.fwi.co.uk/community/topic/john-deere-6310-se-coolant-and-oil-help-needed/

https://thefarmingforum.co.uk/index.php?threads/cost-of-john-deere-head-gasket-repair.21731/

http://www.forum4farming.com/forum/index.php?threads/john-deere-head-gaskets.11058/

http://farmingforum.co.uk/forums/showthread.php?12852-john-deere-7430-7530

 

 

 

 

 

 

 

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The Pretender
Posted 1/6/2017 06:24 (#5747919 - in reply to #5741837)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


The Internet

Fiat Power Train.

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d6btex
Posted 1/3/2017 06:36 (#5740381 - in reply to #5740350)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?



SE Texas

I used to have a 750C.  The 6.8L engine is pretty bullet proof.  Are you giving it ample cool down time prior to shut down?  I would check a few things.  1. Make sure the radiator is clean. 2. verify your temperature gauge reading to make sure it is not running hotter than you think. 3.  Check the fan, water pump and belts.

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TP from Central PA
Posted 1/3/2017 07:13 (#5740440 - in reply to #5740350)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


Dumb question, the coolant settles in the pan if your aren't loosing a ton of it, and the only way you will know is if you pull the drain plug, coolant will come out first, then oil. Is this how you were checking there? Takes a lot to turn the oil to milk if that is what your waiting for.

I ran a few engines with coolant getting into the oil by draining the bit off every day........not recommended but downtime wasn't possible. Tore them down after they weren't needed to correct the problems.
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eight
Posted 1/3/2017 07:32 (#5740479 - in reply to #5740350)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


South Texas
After shutting engine off there is no combustion gas to push the water out. Sounds like you're not letting it cool off enough before shutting down. I had the fan belt drive pulley wear out and cause some overheating, and short life of belts. I've also had to repair the fan shroud a couple times. Not sure on this one, but maybe the fan is on backwards.
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farmwithjunkrrv
Posted 1/3/2017 08:10 (#5740563 - in reply to #5740479)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


South west of Winnipeg MB
I have had water pump cause trouble old 855 with plastic impeller broken fins and what others are saying. Had pitting cause oil in coolant and coolant in oil will go both ways see if oil floating on coolant.
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JD 9400
Posted 1/3/2017 08:53 (#5740676 - in reply to #5740479)
Subject: RE: Deere 6.8 in 750c dozer losing water. Head hasket?


Southern Pa.
eight - 1/3/2017 08:32

After shutting engine off there is no combustion gas to push the water out. Sounds like you're not letting it cool off enough before shutting down. I had the fan belt drive pulley wear out and cause some overheating, and short life of belts. I've also had to repair the fan shroud a couple times. Not sure on this one, but maybe the fan is on backwards.


X2. Double check everything in the cooling system. Sometimes radiators can look clean, but have dirt in the center. Can you shine a light through everywhere? If this engine uses a thermostatic fan clutch, make sure it is working properly. Thermostats good? Water pump? Fan belt? Last but not least, is your radiator clean internally?
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