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Rich Biebel · 02-13-2019, 07:59 AM

Mark, newer Onan V twins(air cooled) engines are built by Subaru-Robin from what I know...…..They are 60 degree overhead valve engines used in 5.5 and 7 kw RV generators. Valve lash spec is .002-.003...

They usually get loose on the lash and not tight. They routinely fail from heat working on the valves, springs, guides and eventually the guides get loose in the head. Real bad problem on those. I replace heads on them all the time...….The hotter they run the quicker and more likely the guide problem will happen.....And owners that don't change the oil often enough. 2 quarts is all they hold.

02-13-2019, 07:59 AM	#17
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Solid lifters in Stock Mark, newer Onan V twins(air cooled) engines are built by Subaru-Robin from what I know...…..They are 60 degree overhead valve engines used in 5.5 and 7 kw RV generators. Valve lash spec is .002-.003... They usually get loose on the lash and not tight. They routinely fail from heat working on the valves, springs, guides and eventually the guides get loose in the head. Real bad problem on those. I replace heads on them all the time...….The hotter they run the quicker and more likely the guide problem will happen.....And owners that don't change the oil often enough. 2 quarts is all they hold. __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 02-13-2019 at 08:01 AM.