Hi hi,
I would like to know something about engine compression...
Engine: 2.5TDi 103KW(140HP), 5 cylinders in line
So here I go:
1) In the manual they write that the normal compression for this engine is 34 bar and it shall not get under 26 bar. What happens if it gets under 26 bar?
2) They also write that when you measure the compression, the engine has to be warm so that the coolant temperature is 80 C. What if you measure the compression when the engine is not warm, actually it is cold, like after driving 5Km in a cold winter morning(-10 C)? Is the compression test result close to reallity(like a difference of max 1 bar) or far from it?
3) Is it possible that the engine "smokes" a lot because the compression is bad? And how bad it has to be, in order to smoke a lot? An engine with bad compression smokes even when the engine is hot?(if it smokes at all because of bad compression)
4) Is it a must that a low compression engine "eats" oil? Or eating oil is independent of the compression?
5) If the engine starts up without much of a problem on cold mornings(like max 2 secs when the morning is cold, but not cold enough so the plugs have to turn on) and if the engine starts up in less than one sec on cold mornings when plugs are used... - is the compression that bad?
6) When is a compression too bad for the car itself, not just that you see that the numbers look bad?
Hope someone will take some time and help me understand this.
Thanks a lot
I would like to know something about engine compression...
Engine: 2.5TDi 103KW(140HP), 5 cylinders in line
So here I go:
1) In the manual they write that the normal compression for this engine is 34 bar and it shall not get under 26 bar. What happens if it gets under 26 bar?
2) They also write that when you measure the compression, the engine has to be warm so that the coolant temperature is 80 C. What if you measure the compression when the engine is not warm, actually it is cold, like after driving 5Km in a cold winter morning(-10 C)? Is the compression test result close to reallity(like a difference of max 1 bar) or far from it?
3) Is it possible that the engine "smokes" a lot because the compression is bad? And how bad it has to be, in order to smoke a lot? An engine with bad compression smokes even when the engine is hot?(if it smokes at all because of bad compression)
4) Is it a must that a low compression engine "eats" oil? Or eating oil is independent of the compression?
5) If the engine starts up without much of a problem on cold mornings(like max 2 secs when the morning is cold, but not cold enough so the plugs have to turn on) and if the engine starts up in less than one sec on cold mornings when plugs are used... - is the compression that bad?
6) When is a compression too bad for the car itself, not just that you see that the numbers look bad?
Hope someone will take some time and help me understand this.
Thanks a lot