Today was a bad day.

[RobertK]

Misfire + Overheating? Sounds definately like a head gasket issue. The leaky heater core could be a product of exhaust pressure leaking into the cooling system.

[rThor432]

- others, feel free to add something I've missed.

You stated the procedure for bleeding an M20. He has a twin cam motor.

That said, what radiator are you using, OP? Some have the convenient brittle blue plastic screws for bleeding. Some dont.

[DoriftuEvo]

You stated the procedure for bleeding an M20. He has a twin cam motor.

Ah hah. Sorry bout that, don't know if the procedure is the same.

[Money$hit]

Yeah, I figured that wasnt the proceedure. I went out to the car, I cannot find a location to bleed the system from, neither on the radiator or thermostat.

Not sure what the radiator is, Im the 2nd owner. Ill see if I can get pics.

[Money$hit]

Misfire + Overheating? Sounds definately like a head gasket issue. The leaky heater core could be a product of exhaust pressure leaking into the cooling system.

Im fearing this. Its been in the red temp a few times, I catch it quick and shut it off, but its been there.

[SpecM]

-they may be related, or not.

-Check for proper wp/them operation
-Do you have a single-cylinder or multiple misfire?

[Money$hit]

-they may be related, or not.

-Check for proper wp/them operation
-Do you have a single-cylinder or multiple misfire?

I believe its a single cyl. Ive tried fixing it a few ways, switching things up (new valve cover gasket, new plugs, etc). Ill work on it and it will always run perfect with no missfire for about a mile or two, then it will revert back into its way.

"-Check for proper wp/them operation"

Are you talking about proper waterpump and thermostat? I think my next purchase is a new thermostat and some of the spark plug rubber boot things because a few are pretty cut up/gunked up w oil that was getting in there before I replaced the valve cover gasket.

[SpecM]

Are you talking about proper waterpump and thermostat? I think my next purchase is a new thermostat and some of the spark plug rubber boot things because a few are pretty cut up/gunked up w oil that was getting in there before I replaced the valve cover gasket.

-yes I was, and yes you should replace those as well.

[BeirBrennerE30]

screw this replacing... bleed the coolant system. That IS is your problem. and its free!

[Money$hit]

screw this replacing... bleed the coolant system. That IS is your problem. and its free!

Thats the problem. Theres no valve to bleed it, or at least I cannot find one.

[jakeb]

If you are using the m42 or e36 radiator with the built in tank then there is a little bleed screw at the top of the rad.

I am not sure the proper way on a m50 to bleed without that, as the e36 would have that radiator.

In the 2002 world people either lift the front of the car to get the bubble to come out the rad cap(cap off). You can also loosen the top rad hose and let it leak out there. use a little pic to pull the hose off the rad connection a little bit. Not actually take the hose off but just pull it up to let coolant/air escape

[BeirBrennerE30]

what radiator did you use? You should have either a) used an m42 or e36 rad that had the bleeder on the radiator or b) drilled an tapped your thermostat housing. in this case unscrew your bleeder screw. On the e36 and m42 rads its the plastic screw on top.

if you did neither remove coolant resi cap and slightly pull back upper rad hose

start the car and keep the rpm right above idle and blast the heat in your car... full hot. Have extra coolant on hand! when the thermostat opens all the air will rush out of your radiator. ADD EXTRA COOLANT. Keep going until your coolant level settles and there are no more air bubble coming out anywhere. Remember keep the revs higher than idle and keep an eye on your coolant level and yoru engine temp.

for your misfire. If you want to do it cheap buy 1 extra coil and swap coils one by one until you find your misfire and it geos away. Or just replace all of them... its a good idea anyway if they are the originals anyway.

[Money$hit]

Thx BeirBrenn, im gonna go work on it right now.

I cannot identify the radiator, but the numbers 21.766.10.003 appear on the side, along with 17289091723464.

[Money$hit]

Thanks to Justin(GazellebeigeM3dildo), today I was able to get some of the issues sorted out.

• Fan clutch is toast as I kinda suspected
• Pressure test on coolant system revealed a small crack in the radiator
• Testing coils he pulled from his car revealed that one of the coils is definately bad
• Head gasket test revealed no issues with head gasket (thank jesus)

I was pleased to see that blunt had endorsed each one of the coils on his s50 with the blunt tech "penis" emblem. Valve cover and fan were covered in penis grafitti as well.

Again, Justin hooked me up with an extra coil and definately lent a helping hand to a retard like me. Definately a standup guy that I thank, and owe a couple cases of "Buusch" to.