Ticking/knocking/nailing on WVO
Posted: Thu Jan 10, 2013 11:31 am
The rabbit is running great on diesel, smooth, quiet, no noises. But when I switch to WVO (two tank heated system, switching at 165f) I get some clattering. Its noticeable at idle, pretty bad at low speeds under a load (taking off in 1st and 2nd gear), and then goes away completely in higher gears. When I switch back to diesel the sound goes away completely as well (in all gears). I put about 1/2 oz of Sea Foam in the WVO filter to see if it would clear things out and it did or about 10 miles, but now the sound is back - although not as bad as before the Sea Foam. It has been in the 30f's here lately, but like I said, I have been letting it warm up - and the WVO gauge is showing temps between 120-150f.
Is this anything to worry about?
I have read that WVO effectively retards timing because of the way it burns and that people are advancing timing to make up for it. Would something like this explain the noise? I like the timing where it is for everything else - good mileage/power, smoothness, cold starting.
What about pulling the cold start on WVO to advance the timing a bit? I read something about that, but haven't tested it yet.
Thanks in advance.
Is this anything to worry about?
I have read that WVO effectively retards timing because of the way it burns and that people are advancing timing to make up for it. Would something like this explain the noise? I like the timing where it is for everything else - good mileage/power, smoothness, cold starting.
What about pulling the cold start on WVO to advance the timing a bit? I read something about that, but haven't tested it yet.
Thanks in advance.