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kip51035 · 11-27-2010, 09:07 PM

When I got my SAITO .90 3 cyl radial one of the intake valves was stuck open. I oiled it and played with it a little and now it works. I have run the engine a couple of times and I took a couple of valve covers off for a look and no oil. I have had more than eight engines apart this year and as I recall none of them had oil in the valve covers. I was wondering if I should run the crank case vent through all the valve covers before venting it overboard.

**williame3590** · 11-27-2010, 09:55 PM

Hey Kip I just remove the covers and give the rockers and valves all a good dose of 3in1 machine oil then reinstall. Once the motor is being flown enough oil from the fuel will eventually get up there, not alot but enough.
I also like to periodically remove the covers and clean everything up with Q-tips then the 3in1 and finally reinstall the covers.

Bill

JETMIKE007 · 11-28-2010, 02:46 AM

LOL! I do the same with the Q-tips, But I use air tool oil

guyl · 11-28-2010, 06:59 PM

Maybe type of oil as something to do with it.
WD40 and other similar oils do dry up.
3 in 1 oil and similar grade oils are different
lubricants.
A son who is a machinist did point this out to me once.

kip51035 · 11-29-2010, 08:33 AM

Yes I know that WD40 dries gummy and I know that Canadian Tire Silicone spray freezes at -10C ( you are not allowed to ask how I found that out). What about my idea to vent the crankcase vent through the rocker boxes.

**williame3590** · 11-29-2010, 02:13 PM

No Kip, then you will have too much oil in the top end......also the crankcase vent should remain exactly what it is intended for, a crankcase vent nothing more.
Your valves and rockers will be fine just the way they are.
Bill

Gary Maker · 11-29-2010, 03:10 PM

Great advise Bill. I have run a number of 4 stroke engines and found that it does take a bit of break in running to loosen up a bit to get the oil into the top end. I like the 3 in 1 oil idea for new engines. It certainly won't do anything but help it!

I personally don't think it's a good idea to vent the crankcase into the rockers. Besides too much oil in the rockers, sometimes the oil that is blown out the vents can be a somewhat grungy and you certainly don't want to be blowing this into the brand new rocker assy!

Just run the engine, for the first few runs, slightly on the rich side and it will care for itself. All the best with your radial engine. Must be sweet running and sounding for sure.

I just love the sound of a multi-cylinder 4 stroke engine! I have a brand new OS 1.60 flat twin that is yet to be fired up. Soon I hope!

11-27-2010, 09:07 PM	#1
kip51035 RCC Supreme Contributor I am: Cliff S Join Date: Feb 2007 Location: Belleville Ont. Radio of choice: Hitec, Futaba - FM # of RCs: 10 Feedback: 25 / 96% Posts: 3,202 Total Props: 18	Stuck intake valve Remove this ad - become a site supporter! When I got my SAITO .90 3 cyl radial one of the intake valves was stuck open. I oiled it and played with it a little and now it works. I have run the engine a couple of times and I took a couple of valve covers off for a look and no oil. I have had more than eight engines apart this year and as I recall none of them had oil in the valve covers. I was wondering if I should run the crank case vent through all the valve covers before venting it overboard. __________________ Kip "If my being here has made your day a little more pleasant then I have done my job" Red Skelton 1913 - 1997 (famous Comedian)
	.

11-27-2010, 09:55 PM	#2
williame3590 Administrator ★ Site Supporter ★ ★ Site Supporter ★★ Administrator ★ I am: William A Join Date: Mar 2006 Location: York, on Radio of choice: Futaba Feedback: 129 / 100% Posts: 10,204 Total Props: 116	Re: Stuck intake valve Hey Kip I just remove the covers and give the rockers and valves all a good dose of 3in1 machine oil then reinstall. Once the motor is being flown enough oil from the fuel will eventually get up there, not alot but enough. I also like to periodically remove the covers and clean everything up with Q-tips then the 3in1 and finally reinstall the covers. Bill __________________ ''engine hoarder''
	.

11-28-2010, 02:46 AM	#3
JETMIKE007 RCC Contributor I am: Michael A Join Date: Jun 2007 Location: Georgetown,Ontario Radio of choice: JR PROPO Feedback: 23 / 100% Posts: 480 Total Props: 4	Re: Stuck intake valve LOL! I do the same with the Q-tips, But I use air tool oil
	.

11-28-2010, 06:59 PM	#4
guyl RCC Contributor I am: guyl Join Date: Apr 2006 Location: Pincourt,QC (nr Mtl) Feedback: 2 / 100% Posts: 314 Total Props: 2	Re: Stuck intake valve Maybe type of oil as something to do with it. WD40 and other similar oils do dry up. 3 in 1 oil and similar grade oils are different lubricants. A son who is a machinist did point this out to me once.
	.

11-29-2010, 08:33 AM	#5
kip51035 RCC Supreme Contributor I am: Cliff S Join Date: Feb 2007 Location: Belleville Ont. Radio of choice: Hitec, Futaba - FM # of RCs: 10 Feedback: 25 / 96% Posts: 3,202 Total Props: 18	Re: Stuck intake valve Yes I know that WD40 dries gummy and I know that Canadian Tire Silicone spray freezes at -10C ( you are not allowed to ask how I found that out). What about my idea to vent the crankcase vent through the rocker boxes. __________________ Kip "If my being here has made your day a little more pleasant then I have done my job" Red Skelton 1913 - 1997 (famous Comedian)
	.

11-29-2010, 02:13 PM	#6
williame3590 Administrator ★ Site Supporter ★ ★ Site Supporter ★★ Administrator ★ I am: William A Join Date: Mar 2006 Location: York, on Radio of choice: Futaba Feedback: 129 / 100% Posts: 10,204 Total Props: 116	Re: Stuck intake valve No Kip, then you will have too much oil in the top end......also the crankcase vent should remain exactly what it is intended for, a crankcase vent nothing more. Your valves and rockers will be fine just the way they are. Bill __________________ ''engine hoarder''
	.

11-29-2010, 03:10 PM	#7
Gary Maker RCC Supreme Contributor I am: Gary M. Join Date: Jul 2003 Location: Stoney Creek, Ontario Radio of choice: Spektrum DX8 # of RCs: 9 Feedback: 34 / 100% Posts: 7,395 Total Props: 9	Re: Stuck intake valve Great advise Bill. I have run a number of 4 stroke engines and found that it does take a bit of break in running to loosen up a bit to get the oil into the top end. I like the 3 in 1 oil idea for new engines. It certainly won't do anything but help it! I personally don't think it's a good idea to vent the crankcase into the rockers. Besides too much oil in the rockers, sometimes the oil that is blown out the vents can be a somewhat grungy and you certainly don't want to be blowing this into the brand new rocker assy! Just run the engine, for the first few runs, slightly on the rich side and it will care for itself. All the best with your radial engine. Must be sweet running and sounding for sure. I just love the sound of a multi-cylinder 4 stroke engine! I have a brand new OS 1.60 flat twin that is yet to be fired up. Soon I hope! __________________ Time flies like an arrow - Fruit flys like a banana!GROUCHO MARKS Stoney Creek Hawks RC MAAC No. 43659
	.

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