Discussion:
Hyster-Yale PSI engines - How they holding up?

How's everybody doing with the new engine (introduced on 2015 models)?

I took delivery of my first units with this replacement for the Mazda second half of last year. I've got seven of them in service now.

Initially, they've performed without any significant issues. Just some grumbling on the maintenance end that they are more difficult to work on due to the cluttered engine compartment.

Just this past week though we may have discovered a **** in the armor. One unit had a head gasket fail at 2300 hrs. While it is possible that the truck was overheated, it's not certain. My dealer claims this is the first such failure they've seen.

For comparison, we collectively put over 2 million hours on our fleet of 2.0L/2.2L Mazda engines and maybe had one head gasket failure. And that occurred at ~25K hours.

I'm certainly hoping this proves to be an anomaly. I'd like to hear how others are doing.
  • Posted 11 Feb 2016 00:36
  • Discussion started by Beeker
  • Indiana, United States
Showing items 1 - 15 of 17 results.
Its not that difficult, Take your time on the first one and use locktite on everything. Let me see if I can find the service bulletin Numbers related to this. I cannot send them to you but can request them from the dealer. BTY what have they quoted you turnkey for the service?
  • Posted 19 Jul 2019 20:23
  • Reply by triumphrider
  • Texas, United States
Thanks for your input. I read the service manual and it does not seem so difficult. Dealership made a big deal, I asked for a parts quote and they quoted me a service quote to take it into their shop instead. After reading the service manual I do not see anything out of the ordinary. Thanks again.
  • Posted 19 Jul 2019 07:12
  • Reply by art_flo
  • California, United States
in europe we have also kubota PSI no timing belt it use doubel of LPG
  • Posted 19 Jul 2019 00:33
  • Reply by AAPEE
  • Brussels, Belgium
I have done a bunch of these, Go step by step as the repair manual says. The belt tensioner requires a special tool to tension the belt properly. Use Loctite on everything and on the two bolts that holds the tensioner in place use silicone sealant to seal for water leakage. there is a kit available P/N 582042903 that has all the parts for this job. Also keep in mind the oil pump is timed Right behind is a plug to install a phillups screwdriver to hold pump in to position Mark all your sprockits/Pullies. The timing belt replacement has been pushed out to 6000 HRS. I also remove the battery / Holder to get a little better access to the motor.There is also a service bulletin on the correct placement of the tining belt tensioner. The kit has waterpump, tensioners timing and counterbalance belts. All this needs to be replaced while you are in there. just take your time in the first one you doand use locktite on everything.
  • Posted 17 Jul 2019 20:43
  • Reply by triumphrider
  • Texas, United States
Has anyone done a timing belt on these?? I am being told by the dealership that I need to send them to their shop due to special tools needed. I've replaced countless timing belts on the old Mazdas and this shouldn't be any different aside from the tensioner and balance shaft. Is their anything I should lookout for?? We have 18 of these trucks and this will be my first one.
  • Posted 17 Jul 2019 06:27
  • Reply by art_flo
  • California, United States
Other than the o-ring issue, mine have been generally reliable. According to my tech, they are definitely more of a PITA to work on though due to engine bay clutter.

My first seven have run a cumulative ~28000 hrs. Coming up on the timing belt interval probably in the next 60 days for a couple of them.

I've since taken delivery of six more of them, and another six on the way later this month.
  • Posted 12 Jul 2016 22:14
  • Reply by Beeker
  • Indiana, United States
I have had an coil pack fail on the #1 cylinder about a week ago. Other than that no issues. As for your coolant leak I put a bottle of liquid aluminum in the units as part of the make ready. Helps with the corrosion and helps with cooling. Cannot say the brand name on this forum but it is available from just about any auto parts store.
  • Posted 12 Jul 2016 20:46
  • Reply by triumphrider
  • Texas, United States
I've seen and repaired cooling system gasket leaks on psi engines that weren't even broken in yet. Not a lot mind you, but more than one. I'm not impressed with the quality of the gaskets. I've also found radiator hoses not tightened properly from the factory. No fuel system trouble yet though.

I'm not a fan of anything Mitsubishi based in this industry. Hopefully my mind will be changed over time, but I'm not holding my breath.
  • Posted 12 Jul 2016 09:35
  • Reply by fixitandy
  • Pennsylvania, United States
This industry has a lot of ups and downs
Just another update. Today found another truck leaking at o ring with 3200 hours on the clock. When removed they do not seem hard and are still pliable. When replaced , I use sealant on o ring. Never leak again. Do not seem to fit tight in housing and possible vibration/ movement may be issue. Also spotted another water pump leaking today at 2850 hours. Think this may be caused by not being able to adjust belt tension..stretch belt too tight and taking out pump bearing. At least I know where the coolants been going!!!
  • Posted 1 Mar 2016 11:02
  • Reply by geoff_g
  • Ontario, Canada
We just lost another here too.

My tech just informed me that this is actually the 4th failure (out of 7 PSI engines) we had. They caught the other two last week while doing PMs.

Wondering if it's a design or material issue. By their description, this cooling port is really close to the exhaust port, so it's getting cooked.

Wouldn't be the first time we had O-ring issues on a Yale. Couple years back, a bunch of them were having o-ring failures on the charge pumps. After a few thousand hours, the o-rings were rock hard. Upgraded them to Viton and the problems went away. Not sure if Viton would hold up here.
  • Posted 1 Mar 2016 01:23
  • Modified 1 Mar 2016 08:41 by poster
  • Reply by Beeker
  • Indiana, United States
Just an update on PSI engine. Just had another coolant tube o ring go at 1500 hours, and a water pump at 3800 hours on another. All on the same day......mmmh ! Mind you these units are never shut off. Run basically 24/7 but I still feel too soon to be having these issues.
  • Posted 24 Feb 2016 11:13
  • Reply by geoff_g
  • Ontario, Canada
The o ring under the manifold has been an issue with all 8 PSI units that I have. Also have had a water pump go at 2000 hours, Now have 4 units faulting rich at 1800 to 2300 hours. Not impressed with 0 clearance engine design. Just a modified Mitsubishi 2.6 litre as found years ago in K-cars and mini vans. Would have the old Mazda back any day as they were bulletproof. And how about the fan belt with no tensioner. Just stretch it over the pulleys.... and Hyster says replace it everytime you remove it. As you can see... so far not impressed
  • Posted 19 Feb 2016 12:26
  • Reply by geoff_g
  • Ontario, Canada
Beeker; thanks for the info.
  • Posted 18 Feb 2016 22:55
  • Reply by triumphrider
  • Texas, United States
Quick follow-up:
Turns out the issue was not a head gasket, but a coolant line under the manifold.

Exit panic mode.
  • Posted 18 Feb 2016 02:31
  • Reply by Beeker
  • Indiana, United States
Yes I should have said interference type motor, The problem was a cam timing sensor. Let me look up the fault code and I will share it with you. The customer looks at it this way,they have ordered a lot of yales over the years and they only had problems with one and the problem was addressed. One of my jobs here is to make sure all warranty issues are addressed.
  • Posted 11 Feb 2016 06:39
  • Reply by triumphrider
  • Texas, United States

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