Continue with the de-sludging.
Try this trick used on other cars with OH hydrolic lifters.
bring the RPM up from idle to 1800-2000 RPM slowly a few times to clear the trapped air out of the lifters.
Printable View
Continue with the de-sludging.
Try this trick used on other cars with OH hydrolic lifters.
bring the RPM up from idle to 1800-2000 RPM slowly a few times to clear the trapped air out of the lifters.
I put Mobil 1 0w40 in all my customers euro cars and haven't had any problems at all with it. M50,m30,m52,m52tu,m60,m70 , and i'm fairly certain that our ambient temps here are much higher than where your at. I also have valve covers off fairly often and haven't seen any signs of camshaft lobe wear which is one of the first places that would indicate if the oil was insufficient, Here's a birdseye view of a merc that i was working on today that i've been putting mobil one in since 0w40 came out. Cam lobes show no wear and everythings clean, no sludge. Can't say the same about the small block chevy that i worked on last week that spun the number 1 and 2 rod bearings running 20w50 though
Quote:
Originally Posted by Russell
If I were in your position at that mileage with crap on my dipstick and visible sludge under the oil cap, I would focus on cleaning the engine before the tick turns into something worse. http://www.auto-rx.com/index.html. After cleaning it for 3K miles, I would stay 5w-40 redline/amsoil or 0w-40 mobile 1. Then if it persists I'd have a shop check it out for wear/damage. You have alot of miles on this car. Which is not bad, but you have to clean it like it's her first baptism.
And if all else fails..
http://i4.photobucket.com/albums/y10...motivation.jpg
Just my experience. I just may have problems with my engine. UOA results have always shown high lead with 0w40 and 0w30 oil. For the 70,000 miles I have owned the car, oil and filter have been changed every 4,000 to 5,000 miles with mostly synthetic. PO followed the oil change lights which meant around 7,000 miles with conventional oil. Lead may just be residiul junk that is left over from 140,000 miles of use. Who knows??
Car has treated with Auto-RX engine cleaner twice to remove any sludge that might be there. Anyway, car seem to run fine.
the hydraulic valve lifters are used and need replacing. there are 24 of them on every m50 engine.
valve adjustment is not an option, these engines have automatic valve adjustment, hence the hydraulic valve lifters.
Ok, I have an update: I ran 15w50 Mobil 1 with a half can of Seafoam for 1200 km's. The ticking was still there, but periodic. So yesterday, I added a can of CRC engine flush, ran the car for 5 mins under no load, and then dropped the oil. I changed the filter, and filled it with 5w50 Castrol Syntec - and 80 km's later, the ticking is STILL gone! So fingers crossed, this might be the solution.
No experience with BMW lifters but Toyota and GM Euro engines with high rev ability will not cope with pure synthetic oil, pressure drops and lifters tic at low revs.Toyota 4A-GE 1600 would not rev below 3k due to lifter problems but would rev to 10750, on wet sump(!) Go with Mobil 1 as it is thick enough to fill lifters but good enough to cope with oil film separation at high revs.
Our 95 525iT has about 140,000 miles on it & I've run Mobil 1 0w/40 ever since we bought it with no ticking issues.
John, I am interested in the oil change history of your car.
Mine had convetional oil changes, per the service lights-every 6,000 miles by the previous owner until I purchased it at 72,000 miles. I noticed a cold start rattle with heavier oils say 15w40 oil. Tried Mobil 1 for several changes. No cold start rattle, yet engine seemed noiser and UOA showed high lead. No warm iddle issues.
Finally tried 0w30 Castrol Syntec (german castrol). Started getting a warm idle rattle. Now my Brew of 2 quarts of 10w40 and 4 quarts of 5w50 does not have the warm rattle.
Even so, I think I will go with a 5w40 or 5w 50 next tiem as I think MY engine for some reason does not do well with a 0 weight oil. Perhps even a heavy 30 weight oil. Perhaps the oil pump is not working well at low rpm. ??? Anyway, just my experience.