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cpayne(at)joimail.com
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 Posted: Fri Sep 18, 2015 11:46 pm Post subject: Oil sludge |
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Regarding the CJ, the insides of the case halves cake up with carbon flakes using non-ashless dispersant oil. Not only does the oil cooler need to be OH'd but the hoses swapped out and oil filter installed. I make a kit for that but I also recommend using a Brackett air filter to keep the dirt out of the oil.
While these may seem small details, the cost to do so adds up and helps add to the life and value of the engine. These details sometimes escape the Bottom End buyer.
Craig Payne
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JL2A
Joined: 07 Apr 2015
Posts: 113
Location: Australia
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| Posted: Sat Sep 26, 2015 6:43 pm Post subject: Re: Oil sludge |
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Thanks Craig, yes I was going down the path of adding a filter before switching to AD oil. To be honest we have run the HS6A to TBO with no problems at all on straight mineral oil - starting to regret buying 55gal of Phillips 25W-60! No doubt it is a better oil but the life of these engines is so short the benefits don't have time to reveal themselves before the engine is removed and sitting in the back of hangar as a giant paperweight.
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cjpilot710(at)aol.com
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| Posted: Sat Sep 26, 2015 7:06 pm Post subject: Oil sludge |
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JL2A,
I would not give up on that engine after TBO time. Watch compressions and Oil consumption and go ahead an put in that filter. Most likely when she's really worn out, its now possible to get them overhauled to Zero time again. Maybe even up graded to higher compression pistons and 'total seal' oil rings. Check with Jill. Most likely when that engine is opened up, it will be very dirty inside. That just character of using mineral oil. And that can be cleaned. And after that overhaul, you can use that barrel of 25w-60! It does not need to become a paperweight.
Jim "Pappy" Goolsby
In a message dated 9/26/2015 10:47:12 P.M. Eastern Daylight Time, info(at)flyingwarbirds.com.au writes:
| Quote: | --> Yak-List message posted by: "JL2A" <info(at)flyingwarbirds.com.au>
Thanks Craig, yes I was going down the path of adding a filter before switching to AD oil. To be honest we have run the HS6A to TBO with no problems at all on straight mineral oil - starting to regret buying 55gal of Phillips 25W-60! No doubt it is a better oil but the life of these engines is so short the benefits don't have time to reveal themselves before the engine is removed and sitting in the back of hangar as a giant paperweight.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447466#447466===============================================
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[quote][b]
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JL2A
Joined: 07 Apr 2015
Posts: 113
Location: Australia
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| Posted: Sun Sep 27, 2015 3:16 am Post subject: Re: Oil sludge |
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Hey Jim - any more info on these overhauls - are they done according to manufacturers specifications?
We have been getting our engines direct from China, $27k the last one in 2014. I was quoted $26,436 to overhaul my last timex - the cost of shipping it back makes it easier to just get another sent out.
A little unsure on how to proceed with my barrel of multigrade! The engine has around 300 hours of straight mineral oil on it, if I ultrasonic cleaned the oil cooler, flushed the tank and replaced the hoses, I'm still left with sludge in the case. I'm tipping that this will then get dislodged and at best undo all my cleaning efforts, at worst ruin the engine.
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cjpilot710(at)aol.com
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| Posted: Sun Sep 27, 2015 8:46 am Post subject: Oil sludge |
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JL2A,
I see by your (com.au) address, you most likely not in the USA, and I'm assuming (Australia). Therefor I don't know the rules you have to operate under or if you have companies that can do this kind of overhauls.
"Manufacturers specifications" overhauls? IF your 'friendly' government (no matter where) requires the engine to be overhauled to Manufacturers specifications you don't have much choice. Here in the states, the only one working on HS6as, that I'm aware of is Jill at M-14p inc. I've been told she does mods, and I NOT sure if she does "zero time" overhauls. She monitors this list, so she can answer those type questions, including prices. I know Allen Barrett is planning to start looking at HS6a but is up to his ying yang in work right now. I know absolutely nothing about overhaul shops in China.
Lets assume you really want to go 25-60. I take it the engine has 300 hrs. since its manufacture or overhaul. Either way it was mostly likely cleaned inside then.
First no matter what, I'd put an external oil filter on the exit line from the oil pump to the cooler. A ten micron filter is best. This alone will start to clean up you engine. Even if you stopped at that point and continued with mineral oil, its better for the engine.
Second. Clean the cooler, tank, and lines.
Third. Remove all the rocker box covers. Clean and inspect and you can check and reset valve clearances while you're at it.
Forth I would remove and clean the oil pump. This is a little more involved than the above, but the advantage is that you would be able to inspect the pump and get a good idea of how dirty the engine is. BTW this is a messy job.
Fifth. I would remove and clean the oil sump from between #5 and #6 cylinders. A lot of crap resides there and when stuff starts breaking loose, a lot of it will come from there. While that's off, you might want to blast off the paint and anodize the magnesium and then repaint. Magnesium corrodes very fast. Again a messy job.
Six. Remove inspect and clean the screen for the prop governor on the engine nose section. Of course the case screen should cleaned also.
If I remember correctly there were no special tools needed. Figure about an hours or two of work to remove all the stuff to get to the oil pump and the same for the sump. Cussing is a requirement.
Now what crap is left in the engine to brake loose is on the internal surfaces of the case, gears, and the hard stuff in the piston rings.
Than I would consider moving over 25w-60.
If anyone has something to add or a better idea please do.
Jim "Pappy" Goolsby
In a message dated 9/27/2015 7:21:03 A.M. Eastern Daylight Time, info(at)flyingwarbirds.com.au writes:
| Quote: | --> Yak-List message posted by: "JL2A" <info(at)flyingwarbirds.com.au>
Hey Jim - any more info on these overhauls - are they done according to manufacturers specifications?
We have been getting our engines direct from China, $27k the last one in 2014. I was quoted $26,436 to overhaul my last timex - the cost of shipping it back makes it easier to just get another sent out.
A little unsure on how to proceed with my barrel of multigrade! The engine has around 300 hours of straight mineral oil on it, if I ultrasonic cleaned the oil cooler, flushed the tank and replaced the hoses, I'm still left with sludge in the case. I'm tipping that this will then get dislodged and at best undo all my cleaning efforts, at worst ruin the engine.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447471#447471===============================================
_-= e ties Day ================================================ - MATRONICS WEB FORUMS ================================================ - List Contribution Web Site sp; ===================================================
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[quote][b]
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JL2A
Joined: 07 Apr 2015
Posts: 113
Location: Australia
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| Posted: Fri Oct 02, 2015 12:39 am Post subject: Re: Oil sludge |
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Thanks Jim, good info.
Will install Craig's kit asap, then ultrasonic clean the cooler, replace the lines and flush the tank with kero (or does this need to be ultrasonic'd too?)
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