Author Topic: Engine and Speedo Trouble  (Read 1849 times)

hansr433

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Engine and Speedo Trouble
« on: June 23, 2020, 04:41:35 »
I just completed a 1000 mile UK-Tuscany trek with more trouble than I cared for.  About 250 miles into trip I noticed that the oil pressure needle, usually right up at the peg, was moving down when I was backing off the throttle.  I had been driving at speeds between 110-130km/h.  I pulled over and saw that the lower part of the engine was full of oil.  Level was at minimum.  Oil was dripping along the length of the car.  I added about 2L of mineral oil that I had in the trunk and continued another 150 miles, slower than before, checking the level every 50km.  At the overnight stop I checked all oil circuit connections and found that the middle bolt on top of the oil filter housing could be tightened half a turn. (Sorry, no photos).  I continued the trip going around 100km/h checking oil level every 100km with minimal loss.  Not sure of what was the source of that oil loss, but am suspecting that I might have piston ring issues and oil escaped from the dipstick breather.  The engine was completely rebuilt at RSP Motorsports in Ontario, Canada, run in on a Dyno for 150km and then had an oil change to LIQUI MOLY МoS2, Leichtlauf Oil 10W-40, which is a semi-synthetic.  I changed the oil/filter (same oil) last year after a 1000 mile trip.  Engine runs really well, pulls nicely and is quiet and has done about 3000miles since rebuild.  What are your thoughts and what should I be doing to diagnose/fix the issue?  I will be changing oil/filter today to 20W-50 mineral oil, since right now I have a weird mix in the engine after topping up the oil.

My just rebuilt speedo is also acting up, oscillating slightly.  I did not change the cable after the speedo rebuild and it is making some whirring sounds.  The same shop (German, specialized in instrument rebuilding and highly recommended by a friend) also rebuilt my tach and it is rock solid, so I suspect the cable rather than a bad speedo rebuild.  So a cable replacement is next.  I checked and did not find step-by-step instruction on the forum.  Can someone please point me in the right direction and also provide a good source for a replacement cable?  Car is in Italy at the moment.

Thank you for any help/suggestions.
Hans
1963 220SE Cabrio (Exterior: Navy MB 332, Top: Haarz Navy, Interior: 482P Sahara Beige)
1963 BMW R69S

hansr433

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Re: Engine and Speedo Trouble
« Reply #1 on: June 23, 2020, 17:36:47 »
OK, here is a quick update.  Today we washed the engine compartment and the underside with hot water to get rid of the oil, changed oil and filter to Motul 20W-50 Mineral oil for cars classic cars and I did a quick video of the fumes coming off the dipstick.  I am definitely having engine issues since the burning oil smell is there.

Here is the video.  Any advice is welcome.
 
https://www.dropbox.com/sh/9tuw64ppccfkncp/AACts5SGVZbnHn8kTf_f_Dc3a?dl=0
 
 
Hans
1963 220SE Cabrio (Exterior: Navy MB 332, Top: Haarz Navy, Interior: 482P Sahara Beige)
1963 BMW R69S