Engine Failure Question for the Experts
just for semantic clarity!
dirt·bag (dûrtbg)
n. Slang
A filthy or vile person.
vile (vl)
adj. vil·er, vil·est
1. Loathsome; disgusting: vile language.
2. Unpleasant or objectionable: vile weather. See Synonyms at offensive.
3.
a. Contemptibly low in worth or account; second-rate.
b. Of mean or low condition.
4. Miserably poor and degrading; wretched: a vile existence.
5. Morally depraved; ignoble or wicked: a vile conspiracy.
filth·y (flth)
adj. filth·i·er, filth·i·est
1. Covered or smeared with filth; disgustingly dirty. See Synonyms at dirty.
2. Obscene; scatological.
3. Vile; nasty: a filthy traitor.
dirt·bag (dûrtbg)
n. Slang
A filthy or vile person.
vile (vl)
adj. vil·er, vil·est
1. Loathsome; disgusting: vile language.
2. Unpleasant or objectionable: vile weather. See Synonyms at offensive.
3.
a. Contemptibly low in worth or account; second-rate.
b. Of mean or low condition.
4. Miserably poor and degrading; wretched: a vile existence.
5. Morally depraved; ignoble or wicked: a vile conspiracy.
filth·y (flth)
adj. filth·i·er, filth·i·est
1. Covered or smeared with filth; disgustingly dirty. See Synonyms at dirty.
2. Obscene; scatological.
3. Vile; nasty: a filthy traitor.
"The case has been settled and the car is being repaired."
Interesting posts. Being an ex machinist, working in dealers as a Service Advisor and manager, has anyone determined the exact failure? I mean a burnt piston is very different than valves contacting the piston. Justb/c one revs to 7k which I do repeatedly on my R56 JCW does not mean that caused the failure. These motors have a rep of burning pistons from being lean.
Interesting posts. Being an ex machinist, working in dealers as a Service Advisor and manager, has anyone determined the exact failure? I mean a burnt piston is very different than valves contacting the piston. Justb/c one revs to 7k which I do repeatedly on my R56 JCW does not mean that caused the failure. These motors have a rep of burning pistons from being lean.
The coolant temp is controlled by the DME. They do run at 220f normally which, historically speaking, is really quite hot. When one runs hard the DME does drop temps to 185f. Not sure if i agree with the sport mode affecting the DME controlled coolant temp as I have gauges, run in sport often incl at the track but on the freeway, in sport temp stays at 220f unless I start hammering it. I dynoed my ride 2 weeks ago and it was lean 14:1or so under load. These cars have a knock sensor so in theory they should not detonate. I never hear detonation but.....kinda loud in there under full throttle. Regardless, a proper tune should really help avoid burning piston an/or valve(s)
The coolant temp is controlled by the DME. They do run at 220f normally which, historically speaking, is really quite hot. When one runs hard the DME does drop temps to 185f. Not sure if i agree with the sport mode affecting the DME controlled coolant temp as I have gauges, run in sport often incl at the track but on the freeway, in sport temp stays at 220f unless I start hammering it. I dynoed my ride 2 weeks ago and it was lean 14:1or so under load. These cars have a knock sensor so in theory they should not detonate. I never hear detonation but.....kinda loud in there under full throttle. Regardless, a proper tune should really help avoid burning piston an/or valve(s)
Then I had a question of why my 2013 R56 JCW only ran at 90C or 195F and no hotter by a few degrees, even with an outside AT at 113F in the desert this summer. I know 2 people who have GP2's who tell me their cars also only run 90C. I have to think that BMW finally is realizing that detonation can be a problem in these 1.6L engines. So, it looks like a 2013 JCW is a rare car indeed. It is the only one with the N-18 engine, and a DME that only allows the coolant temp to run no more than 90C or 195 F.
I have noticed on long trips of 2K or more the R55 MCS auto gets about 2MPG better than the R56 JCW manual, so the A/F mixture must be richer overall on the JCW manual which would help with the detonation problem.
I agree also that the sport button doesn't change anything temp wise, as I tried it on both cars with no change in temp!
On a 2013 MCS the coolant temp will drop from 220 degrees to 185 degrees after hitting the sport button. I drive 140 miles a day. On the highway it's between 118 - 220 normally. After I get off the highway I always hit the sport button and it will quickly drop to 185 degrees. I have about 25,000 miles and a Scangauge II. I have seen this happen daily for more then a year. I stopped looking at engine temp. I monitor AFR, coolant temp, batt volt and boost.
On a 2013 MCS the coolant temp will drop from 220 degrees to 185 degrees after hitting the sport button. I drive 140 miles a day. On the highway it's between 118 - 220 normally. After I get off the highway I always hit the sport button and it will quickly drop to 185 degrees. I have about 25,000 miles and a Scangauge II. I have seen this happen daily for more then a year. I stopped looking at engine temp. I monitor AFR, coolant temp, batt volt and boost.
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