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Showing results for tags 'timing'.
Found 2 results
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Hello all, I've completed by fuel system refit for my surplus BMC 1.8 (westerbeke w50). There are new fuel filters, lift pump, rebuild injection pump, new glow plugs, and new injectors (all 4) tighter to spec (12 ft/lbs). Successful bled everthing according to the manual and got her fired up. She runs a bit rougher than normal. I was cautious to try and get the timing lined up. The previous pump was quite advanced, rotated toward the outside of the engine. The injectors were also in rough shape. My pump is the mechanical variant without the torsion bar. I don't have much smoke to speak of, perhaps a tiny amount that may be steam it's humid at 10 degrees today. The issue: However, when running I'll hear a 'Lumpy' or rocky feeling combustion (I believe) it's pretty consistent. I do not believe it was there before. It's more pronounced at lower rpm it increases with rpm until it's not very noticable. I slackened the Union nuts in the fuel lines and was able to make the engine very lumpy all the time on 3 cylinders. So I know all are firing at some point. The first and 4th fuel line sprays everywhere, while 2 and 3 are a little more relaxed at least not misting. I hope this isn't too much info. Basically, I'm looking to see if the timing could be the culprit here? Perhaps too advanced to cover for the older injectors? Perhaps I installed it not advanced enough? Possible bad new injector? Another thing I'm playing with for a future task is perhaps too much back pressure. I have way to much rise ~1.5M (60inches). The lump feeling does seem to coincide with the wet exhaust discharge interval. Perhaps I didn't notice it before? Another, thought I had: I adjusted the valve lash, if I over did it when tightening down could this cause that issue? Though, it ran fine with the previous injection pump. Any insight or thoughts would be much appreciated! Thank you!
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Hi all, I have a BMC 1.8 that ran fine, then I had a leak from the fuel pump that meant I had to get it reconditioned. Now at idle it runs really lumpy and produces white smoke. It seems ok in gear and moving, maybe with the odd splutter. I know removing and reinstalling the fuel pump can mess with the timing, I'm pretty dim with these engines can I only twist the pump one way or another and repeat as a trial and error method or is there something that would be easier? Thanks in advance.
