cold start trouble E30 M3 |
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M3Nally
Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302 |
Topic: cold start trouble E30 M3 Posted: 01-December-2003 at 17:14 |
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So if I phone my friendly local dealer they will kindly change mine gratis???!!!
That would be nice for Christmas. |
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David 87M3
Really Senior Member I Joined: 16-April-2003 Location: United Kingdom Status: Offline Points: 368 |
Posted: 01-December-2003 at 16:28 | ||
BMW replaced my intake gaskets |
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M3Nally
Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302 |
Posted: 01-December-2003 at 14:52 | ||
I never bodge anything, so do i need any special BMW tools to take the inlet manifold off?
How long to do this job? |
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grant w
Really Senior Member II Joined: 26-February-2003 Location: United Kingdom Status: Offline Points: 558 |
Posted: 01-December-2003 at 13:49 | ||
i'm not endorsing the use of silicon i would'nt use it my self , i'd have new inlet blocks fitted straight away , as i found out to my cost on my old engine that had a air leak on a allready lean running engine and it destroyed one of the pistons , the use of silicon is a trick used by racing teams so that they don't have to keep fitting new inlet blocks ...
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www.redevom3.co.uk 1989 e30 m3 2.5 1996 e36 m3 evo , sold 2002 e46 m3 smg . 1991 Daihatsu 2.8 TD Work Horse Rust Never Sleeps . Tattooed Lady - Bearded Baby - there my family .. |
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215DMX
Really Senior Member II Joined: 14-May-2003 Location: Croydon Status: Offline Points: 1780 |
Posted: 01-December-2003 at 13:45 | ||
I believe BMW had a service update for this problem some years ago which was to use sealant and NOT to replace the intake blocks - anybody?
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 01-December-2003 at 13:35 | ||
The S14 is very sensitive to intake leaks, you should tend to them immediately. Running lean at 7000 rpm is not something you want to do. Regarding the M5 gaskets: I tried them but they only work with the 46 mm throttle bodies, otherwise the shape is totally different.
Don't use silicon on the cylinderhead, you will regret it dearly when changing the gaskets the next time.. You can use it between the gasket and the throttle body though. Sparingly!! Regards, Adwo |
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grant w
Really Senior Member II Joined: 26-February-2003 Location: United Kingdom Status: Offline Points: 558 |
Posted: 01-December-2003 at 11:55 | ||
if your going to bodge the job why go to the trouble to import paper gaskets why not use some silicon sealer just as good if not better or just do the job properly ..
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www.redevom3.co.uk 1989 e30 m3 2.5 1996 e36 m3 evo , sold 2002 e46 m3 smg . 1991 Daihatsu 2.8 TD Work Horse Rust Never Sleeps . Tattooed Lady - Bearded Baby - there my family .. |
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M3Nally
Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302 |
Posted: 01-December-2003 at 10:27 | ||
Cheers chaps,
If I have an air leak, why do the plugs still look alright? I suspect it's because once it gets warm the leaks seal up and it then runs the right mixture. I had a look at Gustaves site where he uses paper gaskets from E28/E34 M5 to seal inlet leaks, has anyone done this? |
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ROB ROSS
Groupie Joined: 03-February-2003 Location: United Kingdom Status: Offline Points: 45 |
Posted: 29-November-2003 at 13:43 | ||
Leaking inlet gaskets. At least you have found the fault.You should really do them as soon as poss.
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grant w
Really Senior Member II Joined: 26-February-2003 Location: United Kingdom Status: Offline Points: 558 |
Posted: 29-November-2003 at 12:46 | ||
the simple solutions are often the best ,its your inlet blocks that need changing , it depends on how your going to drive your car , if it's a every day car and you like to give it some stick then i would change them straight away it won't do your valves or pistons any good running that weak on one or two cylinders .
you'll need to find out what size throttle bodies you have 46mm or 48mm , early cars had 46mm and later cars had 48mm . munich legands have both in stock , £49.17 each + vat and fitting .. munich legends 01825 740456 Edited by grant w |
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www.redevom3.co.uk 1989 e30 m3 2.5 1996 e36 m3 evo , sold 2002 e46 m3 smg . 1991 Daihatsu 2.8 TD Work Horse Rust Never Sleeps . Tattooed Lady - Bearded Baby - there my family .. |
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M3Nally
Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302 |
Posted: 29-November-2003 at 12:02 | ||
Well,
I have checked the plugs, all ok Checked the rotor cap, the contacts are a bit pitted but nothing to write home about Checked the coolant sensor ,reading seemed to be ok Sprayed the inlet manifold with carb cleaner and the revs rose! Sound familiar to anyone. Will leaking inlet gaskets get much worse quickly or can I leave it a while? Anyone got any instructions on changing them? Ta for all your help |
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 28-November-2003 at 21:09 | ||
I can surely understand that!
I am betting on a injector not sealing intermittently combined with the gaskets leaking...
Same to you, let us know what you find... Adwo |
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 28-November-2003 at 21:06 | ||
How can you crank the engine without it turning on? Pull fuse 11 or the fuel relay is the only method I know (or the code feature on the OBC).. Repeat: the only way to bring the S14 back to life is to install fresh spark plugs or hang em out to dry.. Or this is an undocumented Bosch feature: do you have any proof of this IRL? Adwo |
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ROB ROSS
Groupie Joined: 03-February-2003 Location: United Kingdom Status: Offline Points: 45 |
Posted: 28-November-2003 at 18:08 | ||
There is a thing called flood clear mode on injection cars. Engine off, full throttle and crank the engine. That is how you would do a dry compression test with out disconecting your fuel. It works.
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M3Nally
Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302 |
Posted: 28-November-2003 at 16:53 | ||
Adwo,
His theory may be bo~~ocks but it started the car, that was all I cared about. He said it was damp and had alot of cars that day with the same starting trouble. I have not had any trouble starting since but it is still a bit rough until it's warmed up. I am now armed with carb cleaner, and multimeter and will have a look tomorrow morning before the rain comes down again. Good weekend all |
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 28-November-2003 at 16:26 | ||
At WOT the car will also receive the biggest amount of fuel. Once an E30 M3 is flooded the only solution is removing the plugs and drying them. So keep an extra set in your car... Regards, Adwo |
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Sohlman
Really Senior Member II Coupe Chairman Joined: 19-August-2003 Location: Surrey Status: Offline Points: 1259 |
Posted: 28-November-2003 at 14:54 | ||
It could be leaking fuel injectors. Have had a poor running problem on my car after starting that clears itself after it has been running for about 5 seconds, or the revs have been raised to about 2000rpm. Was diagnosed by ML who state that the injectors trickle fuel into the piston and slowly flood the engine. If they leak a little bit like mine it is not to much to worry about, but they have told me that if the starting of the car deteriorates i need to invest in a new set of injectors. They cost about £50 each and the fitting is about 1.5 hours on a 635. So about £400 on my car and i would emagine £300 on a four cylinder M3. Worth having it checked out by someone mind you.
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Sunday 10th July Brooklands Sharkfest and Big Coupe Day. Coupe Events
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David 87M3
Really Senior Member I Joined: 16-April-2003 Location: United Kingdom Status: Offline Points: 368 |
Posted: 28-November-2003 at 14:44 | ||
Fully opening the throttle on a flooded engine is the way to get it going. I guess it allwos max air into the engine.
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 28-November-2003 at 13:35 | ||
did he tell you that? What a load of BS... Think about it: put the pedal to the metal and the injectors will be cut off? How would you ever accelerate that way? Adwo |
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adwo
Senior Member II Joined: 07-November-2003 Location: Netherlands Status: Offline Points: 209 |
Posted: 28-November-2003 at 13:33 | ||
Hmm, why do you think it's not the inlet gaskets. A hunting and rough idle is THE syptom of the gaskets going. Check that out also. Other problems can be a sticking injector or the AFM going south. This wouldn't be as temperature related as you describe however... Or maybe it's the ICV, or... So please do the carb cleaner thing and report back... HTH, Adwo |
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