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Search: Posts Made By: DarZeelon
Showing results 1 to 25 of 43
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Forum: Glow Engines
07-19-2009, 06:45 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

OF,


Please explain; why do you think a Saito, which does not use the crankcase for breathing (like a YS four-stroke), will not be able to breathe, if the passage to the cam-box is shut using...
Forum: Glow Engines
07-18-2009, 08:21 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

OK, Dave.

I guess you have more engines there, as sources of knowledge...

Yet, there are still those, who in this thread wrote of finding the cam-box bone-dry, after running their engines...
Forum: Glow Engines
07-18-2009, 07:52 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Dave,


How can oil in the crankcase of an engine, which bases its entire lubrication on blow-by (i.e. not oil that was in the crankcase before the engine was run), be completely devoid of any...
Forum: Glow Engines
07-17-2009, 11:47 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Maybe, Dave.

But as I remember and reading your posts that showed those components wet with oil, I could not see proof that this oil went through the engine, before getting to the cam-box......
Forum: Glow Engines
07-17-2009, 01:42 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Paul,


Post #224 does not actually detail any mod as such...

What did you mean, exactly?


The suggestion in post #225 does not work very well either.
Forum: Glow Engines
07-16-2009, 05:09 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Craig,


Is that 10 (ten) hours of labor incurred to Saito, by HH, for the repair of one engine??? Or is it minutes?

I will give up my day job, to be paid a 10 hour fare for 30 minutes of...
Forum: Glow Engines
07-13-2009, 04:55 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Steve,


Even though no one cared to state this in the Saito manual, I believe both the cam-box and the rocker chamber must be oil-filled by the engine user and periodically topped up.

It...
Forum: Glow Engines
04-16-2009, 12:13 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

BW,


I think we are done here.

Besides, my hair is pretty thick and will overload the micrometer... ;)


Please read the links in my previous post, to understand how it should have...
Forum: Glow Engines
04-15-2009, 02:53 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

CW,


Noted.
Please read this crucial information, from David Vizard.

He's quite a notable character in auto engines (British, I believe).

Also see this article, and this one too.
Forum: Glow Engines
04-15-2009, 12:05 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

So, CW, do you suppose the theorem in cam manufacturers' publications has been incorrect all along, or has it become so just lately?

After all, you have observed that the lifters do rotate (if...
Forum: Glow Engines
04-15-2009, 11:20 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

CW and BW,


I know how things are manufactured and that there is a tolerance for virtually anything...

But I believe that if a cam manufacturer has an objective; to design the cam-lobes...
Forum: Glow Engines
04-15-2009, 10:58 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

CW,


I have no micrometer, but I do have a brand-new TRW TP-240 (Chevy 350 late '60s Corvette hydraulic) camshaft on hand...

And a camera...


Please look at the photos, excuse...
Forum: Glow Engines
04-15-2009, 10:04 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

BW,


Are you saying the .0002"-.0003" tapers CW found on all the cam-lobes are 'incidental', unintentional production tolerances?

...Even thought it actually serves the purpose of causing...
Forum: Glow Engines
04-14-2009, 11:31 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

CW,


What I am saying, is that even though the bottom of the lifter has a radiused, convex surface, it will not spin as the engine is running; if the surface of the cam-lobe contacting it is...
Forum: Glow Engines
04-14-2009, 04:44 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

CW,


I disagree with you on this. And I have rebuilt 38 full-size engines...

Books on cam theory specifically say the cam-lobes of any flat-tappet camshaft, MUST be angle ground (roller...
Forum: Glow Engines
03-18-2009, 05:08 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Bruce,


Of-course I know this...

And it is even for these reasons alone, that model engine manufacturers should have designed the valve actuation components better than they did...

...
Forum: Glow Engines
03-18-2009, 01:05 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Paul, Chancho,


This seems to be a partial admission, by a leading figure in the Saito marketing chain, that there actually is something wrong in their engines...

The 'admission' by OS...
Forum: Glow Engines
03-14-2009, 02:53 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

S#it!
S#it!
S#it!

Sorry for your loss, Paul...

It would be nice to know if filling zinc dythiophosphate oil (full-size engine cam and lifter assembly lube) in the cam-box (and...
Forum: Glow Engines
03-09-2009, 10:21 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

I figured you might be, Ed...



That can be understood from the fact that most 'full-size' rings are manufactured in huge batches, with pretty strict tolerances...

In 38 full size...
Forum: Glow Engines
03-09-2009, 05:34 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

That's true, Ed.


Insufficient ring-gap - seized engine, broken ring, high wear.

Too large a ring-gap - low compression and high oil consumption (in full-size engines).


If you...
Forum: Glow Engines
03-09-2009, 01:54 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

David,


As I wrote, my Saito seems to have no problems at all... Thank you!

But those few in this thread, as few as they are, bring up the 'I told you so' factor - my worst fears ......
Forum: Glow Engines
03-08-2009, 11:37 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

But then, the oil would not get to the camshaft and the lifters; would it?

There is a problem, the magnitude of which affects different engines differently.
Forum: Glow Engines
03-07-2009, 05:28 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Flap,


From the Saito Singles manual...: "5. Use an “after-run” oil when you’re finished flying for the day. Hangar 9 After Run fuel is recommended." It says nothing anywhere else...
Forum: Glow Engines
03-07-2009, 12:21 PM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

David,


Ed beat me to it.

The fact that this thread is over 217 posts large, does hint at least some are having problems, with the cam and lifters in their Saitos.


My .72 does not...
Forum: Glow Engines
03-07-2009, 09:54 AM
Replies: 408
Views: 52,167
Posted By DarZeelon

RE: Saito 115 cam lubrication

Dave,


After reading what Mandtra wrote, I can only understand that for the Horizon Hobby service people, this is the mandatory 'modus operandi'...

Having left it out of the manual the...
Showing results 1 to 25 of 43
 
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