jhjacobs
Well-Known Member
I recently obtained a 3.0CS and after driving it for a few days it simply died when I pulled out of the driveway. The problem turned out to be a defective condenser insulator that was intermitantly shorting out the points. This problem took several weeks to noodle out but in the process I discovered and corrected a different problem that has me curious and a bit confused. When digging into the engine I found that the CAM timing was off by one tooth (at least I think this was the case) so I set it forward to the correct position. I would appreciate some second opinions because I am now doubting myself.
From 1972-1980 I a Bavaria and I rebuilt the engine several times. Unfortunately I don't still have a factory manual but I recall that to set the cam timing the engine should be set to TDC with the #1 cam lobes poining down. Then the top bolt on the cam wheel should be aligned with the little cast/milled feature on the head. RIGHT? Anyway, with new points, condensor, cam alighned, timing set, dual webers synchronized reasonably well it seems to be running nicely ... idles smoothly at 960 RPM, no missing, and will pull to redline in every gear but 5th.
I am really wondering if the cam is supposed to be set one tooth off (for some reason or other) with this engine? From what I can tell, the engine is an M30 3.0/3.3 from around 1979-1986 because it has a single row timing chain (feature of crankshaft gear). The head has a 1977 casting mark (assume this was done to allow the old weber carbs to be used). The cam appear to be factory standard. Is there any reason for the timing to have been set off by one tooth?
Last question. I am not thrilled about the single row timing chain; has anyone every heard of them jumping a tooth? This seems unlikely because the chain, tensioner, and guide all appear to be quite new and in good condition. I am hoping that the person responsible for building this Frankenstein engine simply didn't get it right. However, it did seem to run fairly well before it stopped running...
Sorry for the long post but I had to get this off my mind and I need some reassurance.
From 1972-1980 I a Bavaria and I rebuilt the engine several times. Unfortunately I don't still have a factory manual but I recall that to set the cam timing the engine should be set to TDC with the #1 cam lobes poining down. Then the top bolt on the cam wheel should be aligned with the little cast/milled feature on the head. RIGHT? Anyway, with new points, condensor, cam alighned, timing set, dual webers synchronized reasonably well it seems to be running nicely ... idles smoothly at 960 RPM, no missing, and will pull to redline in every gear but 5th.
I am really wondering if the cam is supposed to be set one tooth off (for some reason or other) with this engine? From what I can tell, the engine is an M30 3.0/3.3 from around 1979-1986 because it has a single row timing chain (feature of crankshaft gear). The head has a 1977 casting mark (assume this was done to allow the old weber carbs to be used). The cam appear to be factory standard. Is there any reason for the timing to have been set off by one tooth?
Last question. I am not thrilled about the single row timing chain; has anyone every heard of them jumping a tooth? This seems unlikely because the chain, tensioner, and guide all appear to be quite new and in good condition. I am hoping that the person responsible for building this Frankenstein engine simply didn't get it right. However, it did seem to run fairly well before it stopped running...
Sorry for the long post but I had to get this off my mind and I need some reassurance.
