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nhramnl · 10-11-2019, 01:55 PM

Used to back-off rockers on open valves, but was told (quite a few years ago) by a well-respected valve spring source that it might be smarter to just turn the engine over 90 degrees, a couple of times a month. The representative of the company said that modern valve springs actually don't take a "set", and I've verified that by checking pressures after a season of downtime. Also, by turning the engine over (versus backing rockers off), the possibility of valves, seats and stems getting rusty is decreased, as well as piston rings sticking to a cylinder bore. Not criticizing anyone, just offering an alternate viewpoint.

10-11-2019, 01:55 PM	#4
nhramnl Senior Member Join Date: Feb 2010 Posts: 507 Likes: 8 Liked 358 Times in 83 Posts	Re: Winterization/Race Car Storage Used to back-off rockers on open valves, but was told (quite a few years ago) by a well-respected valve spring source that it might be smarter to just turn the engine over 90 degrees, a couple of times a month. The representative of the company said that modern valve springs actually don't take a "set", and I've verified that by checking pressures after a season of downtime. Also, by turning the engine over (versus backing rockers off), the possibility of valves, seats and stems getting rusty is decreased, as well as piston rings sticking to a cylinder bore. Not criticizing anyone, just offering an alternate viewpoint.