Messages

1

Engine + Driveline / Cracked My Thermostat Housing...Should Have Known Better [PICS Added 6/25/11]

« on: June 26, 2012, 03:01:27 PM »

bringing this thread back from the dead... i have this same issue and am attempting to fix it with JB weld. However, it seems like the O ring supplied with the thermostat seems to be too thick... like it's causing a lot of pressure behind the housing when installed and caused the crack in the first place. Is that O ring even necessary? It seems weird how it basically clogs the bleed bypass and the housing sits much more evenly (perfectly in fact) without it.

2

Engine + Driveline / M42 misfire HELP

« on: June 03, 2012, 09:33:28 PM »

fixed it today! ended up being a crack in the intake boot and faulty wires.... ahhh that was so annoying! glad she's back on the road and running as she should be at last.

3

Engine + Driveline / M42 misfire HELP

« on: May 29, 2012, 10:27:05 PM »

also, i pulled off my throttle body the other day and there is a lot of what appears to be water vapor.

it seems to be coming in through the pipe that goes from the valve cover to the throttle body (i've done mess under the intake delete). not sure if this could be causing the miss.... anyone have any idea where it could be coming from?

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Engine + Driveline / M42 misfire HELP

« on: May 29, 2012, 08:15:49 PM »

checked 4&5 on the AFM and they weren't within spec so I swapped it out with another good AFM.

Misfire is still there.

Do I need to allow a few start ups for the DME to recognize the new part or what?

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Engine + Driveline / M42 misfire HELP

« on: May 28, 2012, 12:23:41 AM »

already did stomp test yields 1444... no code.

this issue is extremely frustrating because it only happens under those specific conditions so it's being a real pain to pinpoint.

6

Engine + Driveline / M42 misfire HELP

« on: May 27, 2012, 08:44:34 PM »

Hey guys,

I'm having some serious issues diagnosing a misfire with my 318is.

I've replaced/checked the following

DME
Plugs
Wires
Coil pack
Crank/cam sensor
coolant temp switch
AFM
TPS
FPR
Fuel pressure

The car used to be really bad until I replaced the plugs. Now it ONLY happens when it's warmed up to running temperature and under 2k RPM at WOT under heavy load (like 2nd gear/5th gear pulls). It is minor but still happens and is irritating me very much I feel like I've done everything.

Could it possibly be the wiring to the coolant temp switch? It only happening at running temperature is a major clue I just don't really know where to go from here.

Any help is much appreciated, thanks!

7

Engine + Driveline / Is it the headgasket?

« on: July 10, 2009, 11:25:10 AM »

Sounds good thank you!

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Engine + Driveline / Is it the headgasket?

« on: July 09, 2009, 10:39:39 PM »

Ok guys I NEED help!
I'm not too sure what is good compression for an m42 but ALL cylinders checked out at 185 which led me to believe my car did not have a bad headgasket.
However I still have the overheating issue.... It seems like the coolant is getting pressurized really badly. Like theres an air lock or something blocking it... or is the headgasket gone? There is NOTHING going through the top hose from the t-stat housing to the radiator. I've tried bleeding it out a few times but I'm stumped. I'm hoping it's not the headgasket but if it is I need to get to work on it...

9

Engine + Driveline / Is it the headgasket?

« on: July 08, 2009, 02:43:33 PM »

Well I did a compression test and a cylinder tested low ~120 but I read that m42's lose their compression after sitting for a long time... So I revved it up for about a minute and the idle problem was fixed. However there is a whining sound coming from the timing chain area... Is this something I should be worried about or with all the new components is it just something that will cure with time?

10

Engine + Driveline / Is it the headgasket?

« on: July 06, 2009, 09:16:12 PM »

Alright guys heres a little background on my problem.
As I driving my car one day the engine started to get wayy too hot. I let it cool down multiple times on my way home... had to drive it about 20 miles and when I arrived the temp gauge was all the way up to the red...
The next day I started the car... ran perfectly fine, but there was no water circulating... took one of the hoses off of the thermostat housing and no water came out... it seemed like it was vaporizing? Or just going somewhere it shouldn't....
Decided to do a complete engine refreshing including vac hoses, new timing chain, tensioner, guides, gaskets, seals, plugs, thermostat, w-pump, etc.
The car had the original thermostat after doing 200k miles... so I assumed it probably got stuck hence the coolant circulating problems.
I fired the car up for the first time today after about a month of sitting around waiting for damn parts to arrive (USPS sucks at losing stuff).. car seemed to be misfiring or the compression is just really bad due to the HG being gone. I'm going to run a lot of tests tomorrow to see... I just can't bring myself to believe the HG went bad as the car sat there... it ran perfectly fine when I pulled it in the garage. Maybe the valve timing is off? I don't know... any input is appreciated.