Ant 2 Posted October 25, 2008 Hi all, I've got an issue with my 205. In May oil started to flow out of the air filter. I wasnt sure if it was a turbo issue, firing oil back up through the inlet, or back pressure forcing oil from the oil filler cap back to the inlet pipe. I swapped the engine a spare 2.0 turbo i had in the garage. I havent had a proper drive until today, but still have an issue. Oil everywhere after 5 minutes of hard driving. With a bit more time today, than last may i decided to clean up the engine bay and elimiate where the oil way coming from. I redirected the breather pipe from the filter cap to a plastic 500ml coke bottle, and took it for another spin. I stopped after 2 miles and the engine bay was covered in oil again. This time from the dip stick hole. I placed some tape on the dip stick to make it a tighter fit, and carried on driving. After another 2 miles there was no more oil on the engine bay, but when i checked the bottle it was 2/3 full of oil !!!!! The car runs fine, no smoke, pulls like a train and sounds fine. Just an oil issue. Any idea what would cause this.. On 2 engines. Could i have 2 dudd lumps or 2 dudd turbo units Cheers folks Share this post Link to post Share on other sites
Tom Fenton 1,585 Posted October 25, 2008 Most likely it is worn piston rings allowing the turbo and compression to pressurise the crankcase, this then forces oil out of any available place, such as the dipstick or any breathers. Share this post Link to post Share on other sites
Pug_101 0 Posted October 25, 2008 Most likely it is worn piston rings allowing the turbo and compression to pressurise the crankcase, this then forces oil out of any available place, such as the dipstick or any breathers. Totally agree with this. Very odd that you haven't been smoking though. Share this post Link to post Share on other sites
Ant 2 Posted October 25, 2008 cheers gents, Is there any way of checking this ? Will a compression test show if this is the case? Seems wierd to have an identical issue on two engines ? Thanks Regards Ant Share this post Link to post Share on other sites
rapidcossie 0 Posted October 25, 2008 cheers gents, Is there any way of checking this ? Will a compression test show if this is the case? Seems wierd to have an identical issue on two engines ? Thanks Regards Ant what boost is the car running? does it have an uprated breather system? Share this post Link to post Share on other sites
Ant 2 Posted October 25, 2008 what boost is the car running? does it have an uprated breather system? Boost is standard - half a bar Breather system is standard - as it was in the doner car Share this post Link to post Share on other sites
rapidcossie 0 Posted October 25, 2008 Boost is standard - half a bar Breather system is standard - as it was in the doner car sounds like a blocked breather or two worn engines. Do a basic compresion check to test. Share this post Link to post Share on other sites
Rob Turbo 3 Posted October 25, 2008 Is there a one way valve in the breather pipe from the throttle body to the oil filler? Share this post Link to post Share on other sites
whizzer71 0 Posted October 25, 2008 Check the two "Stubs" on the block that the breather tube from the canister and the oil fill pipe from the canister connect to,These are pretty much always partially blocked with carbonised oil. You can only check condition of bore/piston ring seal with a Leak Down Tester and this requires a compressor,Chances are the rings have had it,only thing is if the bores are a wash with oil if you carry out a check with a compression tester you may find you have good or above compression,hence the need for the leak down test. Hope this helps. Share this post Link to post Share on other sites
Ant 2 Posted October 25, 2008 Check the two "Stubs" on the block that the breather tube from the canister and the oil fill pipe from the canister connect to,These are pretty much always partially blocked with carbonised oil.You can only check condition of bore/piston ring seal with a Leak Down Tester and this requires a compressor,Chances are the rings have had it,only thing is if the bores are a wash with oil if you carry out a check with a compression tester you may find you have good or above compression,hence the need for the leak down test. Hope this helps. cheers for the replies Rob, there is a valve type thingy on a small hose that goes from the throttle. This one has been used on both engines. Can this cause issues ? Whizzer, both "stubs" on both lumps were cleaned out. Before fitting both engines i whipped the sump off and gave it a good clean, as well as the two oil "stubs" Just found this on Leak down tests. http://www.max-boost.co.uk/max-boost/Leakdown_tester.htm I have all the parts here and a compressor so with give this a blast tomorrow Cheers Share this post Link to post Share on other sites
Henry Yorke 270 3 Cars Posted October 26, 2008 Rob, there is a valve type thingy on a small hose that goes from the throttle. This one has been used on both engines. Can this cause issues ? Just a thought... is it on the right way round? Share this post Link to post Share on other sites
Ant 2 Posted October 27, 2008 Just a thought... is it on the right way round? Yeap - Double checked against some pics in the projects section. All seems fine there Share this post Link to post Share on other sites
sonofsam 5 Posted October 27, 2008 But is it actually working as it should though?! There is also that 'diverter' valve inbetween the filler neck & the air intake for the Turbo, is that on the right way round & working? Although on mine I dont have this anymore and just use a small breather filter directly onto the neck. Hope you get it sorted mate Sam Share this post Link to post Share on other sites
Crazy-legs! 0 Posted October 27, 2008 Mine done EXACTLY what you are describing, and i tried everything to rectify it. In the end, i re-built it with a set of forged piston and she never done it since! Stangly though, it compression tested fine and there was hardly any wear in the bores or rings! Cheers, Marc Share this post Link to post Share on other sites
Ant 2 Posted November 1, 2008 cheers for the reply folks. My compression tester arrived yesterday, so just tested: Tested from cold to start with, then when i'd warmed the engine. Finally i added a small amount of oil, waited 30 secs and tested again Cylinder 1 2 3 4 Cold 126 123 120 120 Warm 140 140 150 140 Warm with oil added 180 190 170 160 I presume the higher results when oil is added indicate its worn rings And the next question, i have another turbo lump in the garage. will turning it over by hand give acurate compression results, or does it need to be in the car Cheers Share this post Link to post Share on other sites
Tom Fenton 1,585 Posted November 1, 2008 Looks like it unfortunately. Turning your spare eng over by hand won't be quick enough to build up comp pressure, but if you have a spare gearbox and starter you could bolt it all up quickly and then compression test it driving it with the starter motor and a battery. Share this post Link to post Share on other sites
