Hyster S60FT:
No compression after installing new crank

I've got a 2006 S60FT with a gm 2.4 liter engine. Machine came in for a thrown harmonic balancer, which intern ruined the crankshaft. We replaced the crank, and reinstalled the engine and installed new water pump,timing belt,tensioner and balancer. While engine was out we rotated engine checking compression and found 150 / 155 on all cylinders. When starting for the first time the engine cranked immediately for about 5 seconds and died. Checked all fluids, went to start again to let it run for awhile and it hasn't cranked and ran since. I checked spark ,fuel everything's good buy can't get more than 25 # of compression on any of the cylinders. Removed timing cover to check belt , and timing marks are dead on. Just can't get the compression to come back. Any thought would be great.
  • Posted 19 Sep 2019 05:53
  • Discussion started by bruce864
  • Texas, United States
Showing items 1 - 7 of 7 results.
DTC 522739-6 - Pre-Cat Bank 1 Heater OORL

check your connections to the 02 sensor
could be a shorted ground
  • Posted 7 Nov 2019 16:22
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
Got the machine running buy now it has a code of 522739-6. Any idea what that is?
  • Posted 7 Nov 2019 10:56
  • Reply by bruce864
  • Texas, United States
thats why i was asking about how you did it so you would explain
Now putting oil in the cylinders was going to be a suggestion because of the very thing you mentioned, if the engine was out for a long period.

The other thing is that cam gear problem, if you happened to install it wrong the first time (180deg out), it may have bent some valves, that's why it didn't want to run and why it wont run now even after changing it, and compression is down on all the cylinders like it is. That is a HIGH possibility. I could be wrong but based on your description and new information i would take an educated guess and consider that as a strong possibility.
Do the oil trick first, if it works then awesome! if not and there is no change i think you'll be pulling heads next.
  • Posted 19 Sep 2019 09:18
  • Modified 19 Sep 2019 09:19 by poster
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
I never pulled the head off , just turned the engine over on a stand and removed the crankshaft. I've been told by other techs that when some LP engines sit for awhile the rings will stick one the pistons and they use transmission fluid the loosen them up. And I've tried that but it doesn't seem to help. Just trying to see if anyone else has run into this and what they did to solve the problem.
  • Posted 19 Sep 2019 08:43
  • Reply by bruce864
  • Texas, United States
Pulled the engine out and flipped it over on a stand, and just pushed the pistons down enough to get the rods out of the way of the crank. I've got 2 timing marks on the camshaft sprocket and they are 180* away from one another. I've even tried using the other mark , and still no difference. I'm putting some marvels mystery oil in the cylinders to let them set tonight hoping it will allow the rings to free up.
  • Posted 19 Sep 2019 07:45
  • Reply by bruce864
  • Texas, United States
yup i'm with brewski on this one
odd ALL of the cylinders lost compression though.
I would defiantly pull valve covers and check those valves.
If you have a scope maybe pull the plugs and see if you can get a view of the valves through the sparkplug hole that way and see if any are bent.

When you did the crank job did you pull the engine and flip the engine over, pull the pan, pull the crank without disturbing any pistons right? Or did you do it on a lift or on stands and go from the underside and do it that way? In either case i'm just curious if you might of moved the pistons too much and might of damaged rings or valves from them moving too far.
  • Posted 19 Sep 2019 06:54
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
If it is cranking over real easy you might have stuck valves. Did you have the head cleaned?
  • Posted 19 Sep 2019 05:56
  • Reply by BREWSKI
  • Nebraska, United States

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