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335i engine cooling problem?
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06-24-2007, 12:24 AM | #1 |
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335i engine cooling problem?
I've read about numerous instances of 335i's going into "limp" mode due to overheating. Over in Bimmerforums, they say Dinan has held off on introducing a performance ECU program for the 335i due to poor cooling around the #5 and #6 pistons, which could cause the car to go into limp mode frequently, or damage the engine, after which Dinan would have to cover under their warranty. http://forums.bimmerforums.com/forum...d.php?t=775485
Is Dinan just getting back at BMW for cutting off their relationship? Is there some truth to this, evidenced by frequent "limp" mode engagements 335i owners have experienced? Perhaps the heat dissipation capacity of the radiator/oil cooler is not nearly enough for this engine? |
06-24-2007, 01:04 AM | #2 | |
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Last edited by e.n335; 06-24-2007 at 01:50 AM.. |
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06-24-2007, 01:54 AM | #4 |
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06-24-2007, 01:58 AM | #5 |
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I think that Dinan has some serious problems with their products & pricing. The times have changed, owning a BMW does not imply to pay any price for a mod. Same with Supersprint. If they want to sell something they have to come down to a Vishnu or AA price level. The warranty is no issue. Here in Europe you can get such a warranty for ~ US$ 250 / year.
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06-24-2007, 09:41 AM | #6 |
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06-24-2007, 10:59 AM | #7 |
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It is common that the 335i will overheat if run very hard for an above average period of time...The 12 hour Bathhurst cars received modified, larger intercoolers than stock to prevent overheating [CORRECTION...they received modified oil coolers..sorry about that]...also, some folks who received the oil cooler retrofit have still experienced limp mode on the track. Regarding Dinan, I have no information re that issue.
Last edited by DrewKo; 06-24-2007 at 01:02 PM.. |
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06-24-2007, 11:21 AM | #8 | ||
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Stressdoc is following the subject. From http://www.e90post.com/forums/showth...=50621&page=10 :
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06-24-2007, 11:29 AM | #9 |
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Hartge does not seem to be having any cooling problems with their engine upgrades. But like Alpina, they have modded the engine up to about 340 - 360 bhp (given that I think the N54 that we are all getting is the 325-330 bhp version, this is only a modest 10% increase). I am not aware of increased overheating issues with PROceded cars, although definitive track tests have yet to be performed. Shiv says that the engine can handle cooling problems inherent to the increased boost, but that may involve some further adjustments to the air/fuel ratios or other factors.
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06-24-2007, 11:35 AM | #10 | |
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06-24-2007, 11:41 AM | #11 | |
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I would love to know what was done to the oil cooler to handle those race conditions, because I would do the same to my car. |
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06-24-2007, 11:47 AM | #12 |
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Hey Shiv, could you remind us what brand of oil you guys ran in the Bathurst car?
Thanks.
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06-24-2007, 12:27 PM | #13 |
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Well after the latest Zenmaster's post I'm pretty nervous ...Even though i havent noticed my temp gauge increasing more than it should even for once.
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06-24-2007, 12:39 PM | #14 |
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I did 4 consecutive sub 9 minute laps on the Nuerburgring and the temp never once got above 250; ambient was 80*+.
If the car can handle that, I'm not too worried about driving around the town. |
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06-24-2007, 12:56 PM | #15 |
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Why are you nervous? I'd enjoy the car, and if there are any engine problems down the road, BMW will take ownership of the problem and take care of it. Unlike many auto manuf., they are good about standing behind their products. When my E34 540i's Nikasil engine went bad, they replaced the entire thing for free with one from the E39. This was after 100,000mi was put on the original engine. Hell, that's one of the reasons my next car was also a BMW. A company like Mazda, on the other hand, would leave you in the cold.
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06-24-2007, 01:09 PM | #16 | |
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06-24-2007, 01:16 PM | #17 |
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I guess it depends on the nature of the problem and if there is a recall involved. In this case, there was a recall. However, I've never heard of any BMW engine going bad before 100K mi. unless there was a design or manufacturing defect.
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06-24-2007, 01:50 PM | #18 |
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This overheating of clylinder #5 and #6 is a quite old story and came up when Alpina developed the 360 bhp version of the N54 engine. I had a tel. discussion with a guy who has been involved in the development those times ( end of 2006 ). According to him it has been a design flaw on early engines and has been fixed ( retrofitted ). It would make no sense for BMW to produce still the old design, being aware about the issue, risking engine problems and having it to be retrofitted by Alpina. This would also be a perfect explanation why there are some engines out producing significant more heat than the majority of the N54's. All I can say is that my engine ( a pretty new one ) is running on the cooler side, with and without the PROcede.
Hope that helps. Cheers Eugen |
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06-24-2007, 04:09 PM | #19 | |
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My build is Nov. 2006 (no oil cooler and sport/step). I took the car out today in 90 degree heat, did two runs for a total time of about 7-10 minutes up to 120 mph and instantly got it to 280 degrees. One more run and it would hit limp mode. I have a Procede. I have a buddy south of me also with a Procede, later build date than mine, who received the oiler cooler retrofit, took his car to a track and it went into limp mode in 15 minutes. I am getting the oil cooler retrofit, but, just like the Bathurst cars that received some modified oil cooler to handle this issue, unless your 335i has such a modification and is a step sport, you are going to have real, major heat issues, to the point that you will not be able to run your car hard for more than a little while, and definitely won't be able to run it hard on a track. This was true of my vehicle before installing the procede, when I put it to 295 degres on the highway in atlanta in about 5 minutes at 120-130 mph before slowing down to avoid limp mode, and after using the procede. Whether it is a TT, Cherry Tuner, AA tuner, RD sport tuner, Alpina, or Dinan, without some modification to the cooling system, the car is going to run hot when pushed within its limits and hit limp mode. If anyone has tracked their 335i hard with an oil cooler and not had any heat issues, I would like to hear about that. My experience thus far is the opposite, but then again maybe there are different engine parts or systems already in circulation. Eugen, i would like to hear more about this "retrofit" you mention. |
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06-24-2007, 04:10 PM | #20 | |
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Even though my temp gauge always stays on the "coolest" side of the panel but the fact is I'm not stressing my car extensively in order to know for sure. I think i will take it for a "vicious" ride soon.
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06-24-2007, 04:15 PM | #21 |
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P.S., here is a summary of what Steve Dinan said about the overheating issue at Bimmerfest taken from http://forums.bimmerforums.com/forum...d.php?t=775485
"I listened to Steve Dinan's lecture at Bimmerfest. He addressed the 335i. Says the hold up on many issues is related to the engine's sub par cooling on the 5&6 cylinders. The engine tends to overheat due to the turbo chargers and the narrow water pathways of the block's water jacket. It sounded like they were going to try improving the volume of the H2O pump to flow more coolant through the motor. I was kinda left with the impression that until they solve the heat issue, they are gonna delay release of anything to increase power since the engine is rather delicate from an overheating perspective." This above sounds like what I am thinking is necessary to adequately address the issue. |
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06-24-2007, 11:28 PM | #22 |
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Sept 2006 build here, step/sport no oil cooler. I have purposely ran this car hard (0-100-0, for 30 minutes) to purposely get high oil temps. Gauge never got over 250 F, go figure.
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