78buckshot
We installed a RO3015 on Friday, I commissioned it Monday, to my surprise Generac is again putting the Chery engine in the 25-35kw liquids, I hope they have the bugs ironed out this time around. Oops, I should have posted in liquid cooled.
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MacL
Maybe you could contrast and compare the Chery and Fiat 1.5's....
State your problem, not your diagnosis.
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78buckshot
I can't give any info on recent Fiat's, I service a 25kw Fiat that is 10-12yrs old, no issues with it. The 1.6 Chery had oil pressure control problems, the 1.5 Chery that I started on Monday had 105psi oil pressure @3600 RPM cold, I ran it on and off loaded and unloaded for about an hour and the pressure settled in at 70psi. I expect to see it a little lower after the break-in run hours and a change to 5w-30 synthetic. It's the cold high pressure that concerns me, why would the pressure relief valve not keep it close to the normal running pressure?
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Birken Vogt
78buckshot;36912 wrote:
I can't give any info on recent Fiat's, I service a 25kw Fiat that is 10-12yrs old, no issues with it. The 1.6 Chery had oil pressure control problems, the 1.5 Chery that I started on Monday had 105psi oil pressure @3600 RPM cold, I ran it on and off loaded and unloaded for about an hour and the pressure settled in at 70psi. I expect to see it a little lower after the break-in run hours and a change to 5w-30 synthetic. It's the cold high pressure that concerns me, why would the pressure relief valve not keep it close to the normal running pressure?


105 cold / 70 hot is normal for just about any modern engine I have seen from the 1980s to today, especially at 3600 RPM The problem engines had much higher pressures than that.

The relief valves just seem to work that way, probably because it is good enough.
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78buckshot
I'm used to regular automotive engines, gas, diesel, V8's. Of course they don't run @ 3600 cold right out of the gate but they still have good pressure control. We'll just have to trust Generac and Chery.
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