What weight oil for Lycoming 0-320 H2AD?

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dhpt99
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What weight oil for Lycoming 0-320 H2AD?

Postby dhpt99 » Wed Feb 21, 2018 2:31 pm

Just picked up my first aircraft powered boat with a Lycoming 0-320 H2AD and not sure which weight oil is common to run.

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Slidin Gator
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby Slidin Gator » Wed Feb 21, 2018 6:26 pm

You want aviation grade 50, Weight oil. Do not use 50 weight automotive engine oil (unless in a pinch) as the additives are different. The most common is AeroShell 100W, it is also the most expensive. Usually about $75 a case at most airports and some other places you can get AV gas. I don't really know why they call it "100" since it is a 50 weight oil?? It is also a straight weight oil, no multi grade (20-50 etc.). The "W" stands for the Ashless Dispersant additives. You want the "W" grade unless you are breaking in new rings. When breaking in you run plain 50 weight mineral oil, AeroShell 100, with no W, for the first 50 hours. Again, you can run straight, non W oil in any motor for a while, but the "W" grade additives help keep the motor clean(er).

There are other comparable oil brands from other companies, Phillips for one. Search oil on the Aviation Only forum and you will find discussion of other brands. I only have experience with the AeroShell.
I grew up thinking that I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540. A Bob Stossel original, still running strong.

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby Waggs » Wed Feb 21, 2018 9:41 pm

MAKE SURE TO RUN A CAM ADDITIVE!!! Aeroshell Plus has the additive, that’s what the plus indicates.

Those engines are infamous for cam wear.
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diamondback0320
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Wed Feb 21, 2018 9:44 pm

X2 on the additive..Phillips victory also has the additive & is considerably cheaper by the case or you could order camguard by the pint..better to use it fer sure!!

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby Slidin Gator » Wed Feb 21, 2018 10:18 pm

That is good info for me too, I learn something everyday thanks!

I see that the 100 is 2X the weight, so the 80 is a 40 weight oil, that answers my earlier question.

This link covers the Shell
https://www.shell.com/business-customer ... 0plus.html

Here is what Phillips says:
Phillips 66 Victory Aviation Oil 100AW, 12/1 Qt. bottles, is an ashless dispersant, single-grade engine oil pre-blended with the proper concentration of antiscuff/antiwear additive (LW-16702) as mandated by Lycoming Service Bulletins 446E and 471B and Service Instruction 1409C. It is recommended for use in opposed piston and radial piston aircraft engines where cam lifter wear is a concern.


I see both of you run the 320, did some quick googles to put the information here.

Here is what Lycoming 446E and 471B cover:
Lycoming O­320­H, O­360­E, LO­360­E, TO­360­E and LTO­360­E series engines.
Lycoming TIO-541-and TIGO-541 series engines.

TIME OF COMPLIANCE
At next engine oil change and at every 50 hours and at every oil change thereafter.

Laboratory tests indicate that occasionally when the engine is first started, for a very brief interval there is insufficient residual oil between the rubbing parts which affects the service life of components. Lycoming has evaluated an agent which, when added to the normal oil supply, deters scuffing under these conditions.


1409C covers friction clutch systems.

The interesting thing that I see in all of this information is that the additive package is specifically designed to stay on the cam (crank etc.) during long periods of in-operation to protect against corrosion and dry starting. So the additive would be good for any engine that gets occasional use.

Does anyone know any reason NOT to use the plus additive is any aviation engine?
I grew up thinking that I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540. A Bob Stossel original, still running strong.

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Wed Feb 21, 2018 10:59 pm

Nope..but I can vouch for cam & lifter wear.. I've had 2 of these motors and while they are good strong motors if not worn out you WILL have cam & lifter problems even with the additive.. I've had this boat with the h model now for almost 5yrs & have used either the oil with additive or the cam guard and still have replaced lifters 3 times after inspection and found scuffing & galling & pitting on the face of the lifters..not to deter anyone from these motors it was just a bad design by Lycoming.. I'm in the process of having a motor built now with a different valve train..they are inexpensive motors to by & run well but have these problems so after 2 boats with this motor I'm going a different direction

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Wed Feb 21, 2018 11:14 pm

Now after that post lol..I do have a good friend that has the same motor that Wally moore built for him 20+ years ago & it's still kicking along.. only thing I know that he's done to that motor is 1 cylinder and a starter or two & has never used any additive in the oil & I know for a fact he's never pulled & inspected any lifters let alone replaced any so there's no telling what they look like..so hard to say but I've had bad luck with em

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby Blownaway540 » Thu Feb 22, 2018 6:19 am

A pre-lube system goes a long way in any motor/engine that is not run regularly. Mark
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby dhpt99 » Thu Feb 22, 2018 12:14 pm

Thanks for all the information. I bought the boat from a buddy and has a fresh rebuild but i do notice what i suspect to be some valve train noise but i just thought it was common with these aviation motors. How noisey are your H2AD's while there running?

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Thu Feb 22, 2018 12:48 pm

If the lifter are good & pump up like they should shouldn't be much noise..then again I guess it all depends on what the valve lash was set at which should be between .028 & .080 which is pretty good tolerance so shouldn't be a lot of noise especially after your oil pressure is up & motors warmed up

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Thu Feb 22, 2018 12:51 pm

Are you running avgas? If not try that..they recommend avgas vs pump gas because of the higher compression pistons

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby dhpt99 » Thu Feb 22, 2018 1:34 pm

Yea Im running AV Gas and i was going to check the valve lash but haven't had a chance yet. I dont have a working oil pressure gauge as of right now but thats next on my list of things to fix. I know the engine just had a valve job done on it and new rings and pistons.

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby dhpt99 » Thu Feb 22, 2018 1:43 pm

Image

Image


Heres a picture of it if anyone knows the boat

diamondback0320
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Thu Feb 22, 2018 1:55 pm

Nice boat.. just so you know if you don't already you can't check the valve lash after they've been installed and run..to set the lash they have to be pulled out & collapsed & takin apart & cleaned out & installed dry & lash set dry..on that particular motor anyhow..that valve train is different than any other motor..good luck with it & have fun!

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby dhpt99 » Thu Feb 22, 2018 3:32 pm

I was under the assumption for some reason that they have flat tappet lifters, are they hydraulic?

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Slidin Gator
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby Slidin Gator » Thu Feb 22, 2018 6:53 pm

I am not intimately familiar with the 320, but I am pretty sure it is similar to the 360/540. In which case they are flat cam followers, pushing on a hydraulic lifter, pushing on the push rod. You do have to bleed them, I use a small brass rod (something softer than the steel ball inside). The procedure is in the manual and you can find a copy on this board.

I note that you said the engine has new rings and pistons, so you do want to go through the break in procedure and use break in oil without the ashless dispersant additives. I'm thinking you may want to still use the cam additive during the break in, which would be the camguard cited, just added to the oil. But I suggest waiting for anyone else to weigh in on that item.

Don't baby it during break in, let her heat and eat, cool her down and repeat.
I grew up thinking that I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540. A Bob Stossel original, still running strong.

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Fri Feb 23, 2018 9:18 am

They look exactly like a old school hydraulic Chevy lifter..flat tappet

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Fri Feb 23, 2018 9:27 am

Matter of fact the rocker arms looks like Chevy rocker arms also...like I stated b4 this particular motors valve train is different than any other motor & cylinders are totally different & cannot be interchange with other lycomings

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Re: What weight oil for Lycoming 0-320 H2AD?

Postby PJC » Sat Feb 24, 2018 1:22 pm

They’re actually small block ford rockers, there’s information online about it, some people have even swapped to roller rockers.

diamondback0320
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Re: What weight oil for Lycoming 0-320 H2AD?

Postby diamondback0320 » Sat Feb 24, 2018 1:52 pm

Yeah I've heard & read bout people using ford lifters also but if you mic them there not exactly the same..I was gonna go that route with my 1st h model but didn't take the chance


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