Errr Colder weather??
try a 75/25 mix see if that works
Maybe it is the colder weather, starts first time though, might just fill up with diesel .
50/50 is a bit much veg oil for the cold weather I'm afraid, I don't use more than 30/35% in the winter.
Er that only adds up to 65% whats the other 35% then ????
I knew some fastidious git would say that.
Ok I should have said "50% is to much veg oil for the winter" not 50/50.
Better? :mooning:
Nope that bit was fine it was the 30/35 that got me
What you worried about TD5's don't like veg anyhoo.
lol, no it's a good engine, plenty of oil/pressure, 140k, it's deffo diesel knock and not piston slap, but I just wonded why it's developed it, been on 50/50 veg for about a month, can't see why that should do it though.
If it is a DIESEL engine, and it is on trailing throttle (i.e. foot OFF the throttle pedal and the car slowing down) any Knocking noise IS NOT and CAN NOT BE diesel knock.
End of discussion.
The knocking must be due to some other fault, probably mechanical wear, and classically piston slap or a failure of a small end bearing.
CharlesY
200tdi was running fine, but now developed diesel knock on light or trailing throttle, was told it had a belt 20.000 mile ago, did wonder if the belt had gone slack, but not sure if this would advance or retard it.
Any thoughts ?
I call trailing throttle when you more or less balance it, ie.backed off BUT NOT fully, then throttle
It is diesel knock :doh: it's the cause that's the issue .
If the belt slackens the timing RETARDS, but if it did that enough to make any difference, the belt would jump the pulleys and stuff the whole issue.
See what you said FIRST, which is utterly different from what you say SECOND.
In the first instance you are saying "TRAILING THROTTLE", but in the second you are saying "THEN THROTTLE" implying putting your foot down a bit on the GO pedal.
These are two completely opposite situations
If it is TRAILING THROTTLE then no, it is not diesel knock. It CAN NOT BE, and if you understood diesels you would know why.
If it is knocking when you apply throttle especially at low revs then there is one classic reason for that situation too.
But as you're the expert you don't need me to tell you what it is.
End of my input.
CharlesY
OOOOOOOOOOOoooooooooo
does the vacuum pump knock when it's on its way out?