After some hundreds of Kms and 6cm of crankcase vacuum at idle and 3.000tr/min,
I still find half a litre or oil in the air filter housing.
So what's wrong with it?
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| Author: | Taskos [ November 21st, 2013, 9:17 pm ] |
| Post subject: | reniflard II |
After some hundreds of Kms and 6cm of crankcase vacuum at idle and 3.000tr/min, I still find half a litre or oil in the air filter housing. So what's wrong with it?
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| Author: | ken [ November 21st, 2013, 10:00 pm ] |
| Post subject: | Re: reniflard II |
Taskos, I doubt that there's anything wrong with your breather, which is doing its job of venting crankcase fumes into the air filter box as well as creating a vacuum inside the crankcase. The problem is most probably with your engine, specifically excessive 'blowby' past the piston rings, so that the breather is unable to condense all of the oil from the vapour which passes through the breather. A leakdown test would be most appropriate method of checking the condition of the pistons and rings. http://en.wikipedia.org/wiki/Leak-down_tester Also http://www.youtube.com/watch?v=7UcOn8OEt0Y ( Making a homemade tester.) & http://www.youtube.com/watch?v=GvG22YMOzUI ( Using the tester.) ken Taskos wrote: After some hundreds of Kms and 6cm of crankcase vacuum at idle and 3.000tr/min, I still find half a litre or oil in the air filter housing. So what's wrong with it? |
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| Author: | lpgo [ November 21st, 2013, 11:01 pm ] |
| Post subject: | Re: reniflard II |
I had the same problem in my turbo car, I solved it with an oilcatchtank, I've put the oilcatch tank between renyflard and airfilter, so the oil wouldn't reach the oilfilter, ofcourse this isn't the proper solution (see Ken's story) but when this is really good engine apart from this, this is a good way to go..... You can drain it le'ts say every 1000km or so and that's it.... you can make it yourself it is just a bit of pipefitting, otherwise take a look at this.. http://www.ebay.com/itm/HIGH-QUALITY-CAPACITY-BILLET-ALUMINUM-OIL-CATCH-RESERVOIR-TANK-CRANKCASE-BLUE-/400611608883?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d46500933&vxp=mtr |
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| Author: | ayjay [ November 22nd, 2013, 12:09 am ] |
| Post subject: | Re: reniflard II |
pistons/bores are worn, causing blowbye get a rebore and 2 new pistons |
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| Author: | Terry [ November 22nd, 2013, 12:33 am ] |
| Post subject: | Re: reniflard II |
Just a quick comment [tip?] .....a couple [?] of years ago I destroyed * one cylinder of my engine .....the "blowby" was so bad that the carb choked up on oil fumes .....I got home [on 301cc's] by removing the air cleaner to carb. hose [it was the only way the engine was gonna run]. * Broken rings,scored barrel,cracked head,broken piston etc .... the engine had overheated,Ken rebuilt it for me [btw Ken  ....its still going like a good 'un ...  ]T. |
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| Author: | Sean [ November 22nd, 2013, 9:05 am ] |
| Post subject: | Re: reniflard II |
Ive nearly always found the same - this tears race car had the same syptoms and after much it could be and it cant be took the top end off honed the barrels and fitted new rings. 24hrs later 1tablespoon of oil in the catch tank it had been dumping half a litre in abour an hour Viking , did you ever get to the bottom of your oil dump issue? |
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| Author: | 2CViking [ November 22nd, 2013, 9:41 am ] |
| Post subject: | Re: reniflard II |
Sean wrote: Ive nearly always found the same - this tears race car had the same syptoms and after much it could be and it cant be took the top end off honed the barrels and fitted new rings. 24hrs later 1tablespoon of oil in the catch tank it had been dumping half a litre in abour an hour Viking , did you ever get to the bottom of your oil dump issue? Haha you knew I would read this. No haven't had time to strip the engine since returning from Spain. I'm off to Denmark for Christmas, so maybe next year sometimes  On a positive note. I'm feeding the chassis with the oil reducing the risk of rust worm attack. Not really sure if I want to fix it. Engine is running well so no worries Attachment: P8031911.JPG |
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| Author: | ChrisW [ November 22nd, 2013, 11:42 am ] |
| Post subject: | Re: reniflard II |
Taskos wrote: After some hundreds of Kms and 6cm of crankcase vacuum at idle and 3.000tr/min, I still find half a litre or oil in the air filter housing. So what's wrong with it? 6cm of vacuum is not a lot - on mine I have 40cm at idle |
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| Author: | lpgo [ November 22nd, 2013, 1:04 pm ] |
| Post subject: | Re: reniflard II |
2CViking wrote: I'm feeding the chassis with the oil reducing That's a real big oil catch tank then |
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| Author: | ken [ November 22nd, 2013, 2:28 pm ] |
| Post subject: | Re: reniflard II |
And at full chat/full load, which is when a 'pressurised' crankcase is going to make itself known? Similar scenario to that of ignition timing; what's happening at tickover isn't of much importance, it's what's happening when the engine is really working for its living which counts. I once fitted the manometer inside a car, so that it could be monitored by the passenger as the car was driven. Anyone else tried this? ken ChrisW wrote: 6cm of vacuum is not a lot - on mine I have 40cm at idle |
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