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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 08-07-2009, 12:47 PM
JPMONKS JPMONKS is offline
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What are the sings of a blown head gasket?? E46

I have a coolant leak I have just discovered..and the car overheated for approx 5 mins! Is is true that the big rubber hose that comes from radiator into engine, if that is hard that means the head gasket is blown!...Is that true? as it felt hard enough it was quite hot.. I havent seen any whitesmoke either from exhaust..


Please help! How much would it be if the head gasket was blown??
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  #2  
Old 08-07-2009, 12:49 PM
akhbhaat akhbhaat is offline
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The most obvious symptoms are "milky" (coolant saturated) oil and white smoke (evaporating coolant/water).

If that's the case, get some lube. It's not a cheap repair and not something that most people can DIY. My buddy paid out something like $2500-3000 USD to have the head gasket replaced on his E36 M3 (I'm sure there are shops that will do it for less, but it's going to be expensive regardless).
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Last edited by akhbhaat; 08-07-2009 at 12:52 PM.
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  #3  
Old 08-07-2009, 12:56 PM
JPMONKS JPMONKS is offline
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I dont know if it is blown but If I started it at anytime would there be white smoke for instance? Would the oil be watery/nilky now for instance if I checked...

I heard its quite expensive..this is the second issue with coolant leaking.

Cheers for the help dude
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  #4  
Old 08-07-2009, 01:09 PM
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Head gaskets are so easy to replace and cost like $20-40s plus the head gasket glue for like $5s....
If you ever need to replace it just DIY it.
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  #5  
Old 08-07-2009, 01:10 PM
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Quote:
Originally Posted by MalibuMafiaV View Post
Head gaskets are so easy to replace and cost like $20-40s plus the head gasket glue for like $5s....
If you ever need to replace it just DIY it.
Um... NO.

I believe you are thinking of a valve cover gasket.

HEAD gaskets are a very involved job.
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Old 08-07-2009, 01:13 PM
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Originally Posted by KrisL View Post
Um... NO.

I believe you are thinking of a valve cover gasket.

HEAD gaskets are a very involved job.
ahh yes.
Valve that is what I was thinking of. thanks kris
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  #7  
Old 08-07-2009, 01:22 PM
akhbhaat akhbhaat is offline
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Quote:
Originally Posted by JPMONKS View Post
I dont know if it is blown but If I started it at anytime would there be white smoke for instance? Would the oil be watery/nilky now for instance if I checked...
Should be, yeah - at least with the milky oil. If your oil is dark and unclouded, you're probably in the clear (at least for now). If that's the case, I'd still keep checking it for several weeks just to be sure. Overheating the engine is no joke - but for all I know, the four pot engines might be more resistant to it than the six pots.

From what I remember with my friend's M3, there was a little smoke at first, and it became progressively worse over time. The smoke/exhaust fumes should also have a "sweet" rather than pungent (e.g. burning) odor.
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Last edited by akhbhaat; 08-07-2009 at 01:26 PM.
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Old 08-07-2009, 02:00 PM
JPMONKS JPMONKS is offline
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Cheers as checked car there and there is no smoke nor is there milky consistency in the oil..and there is no white smoke..thank god..but will keep a very close eye on it..it gave me a kick up the a@s no doubt as will get it sorted asap..


Cheers guys!
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  #9  
Old 08-07-2009, 02:04 PM
JPMONKS JPMONKS is offline
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Originally Posted by akhbhaat View Post
Should be, yeah - at least with the milky oil. If your oil is dark and unclouded, you're probably in the clear (at least for now). If that's the case, I'd still keep checking it for several weeks just to be sure. Overheating the engine is no joke - but for all I know, the four pot engines might be more resistant to it than the six pots.

From what I remember with my friend's M3, there was a little smoke at first, and it became progressively worse over time. The smoke/exhaust fumes should also have a "sweet" rather than pungent (e.g. burning) odor.

Cheers appreciate the answer it has relieved my fears somewhat knowing that the car is showing no signs of the above..


Thanks again,

JP
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  #10  
Old 08-07-2009, 02:05 PM
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Originally Posted by MalibuMafiaV View Post
ahh yes.
Valve that is what I was thinking of. thanks kris
haha

THIS is a DIY for the headgasket...

http://www.pelicanparts.com/bmw/tech...ead-Gasket.htm
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  #11  
Old 08-07-2009, 02:30 PM
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SJ this stuff is great but I think, if this gets screwed up. It will be even more expensive to repair. Pro is the way to go.
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Old 08-07-2009, 02:36 PM
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SJ this stuff is great but I think, if this gets screwed up. It will be even more expensive to repair. Pro is the way to go.
Yup. My headgasket went on my Land Rover Discovery. I paid 900 to get it done.
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  #13  
Old 07-11-2014, 01:03 PM
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please help me...

sorry but I think this post is worth being brought to life.


Is constant low coolant a sign of bad head gasket? my e61 needs 750ml of coolant mix every 650 miles, about a week worth of driving...

no other symptoms of issues, made an appointment with dealer for end of month, but currently I just add more coolant.

thanks a lot.



Quote:
Originally Posted by KrisL View Post
Um... NO.

I believe you are thinking of a valve cover gasket.

HEAD gaskets are a very involved job.

Last edited by silverbimmer3; 07-11-2014 at 01:20 PM.
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  #14  
Old 07-11-2014, 01:59 PM
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Quote:
Originally Posted by silverbimmer3 View Post
sorry but I think this post is worth being brought to life.


Is constant low coolant a sign of bad head gasket? my e61 needs 750ml of coolant mix every 650 miles, about a week worth of driving...

no other symptoms of issues, made an appointment with dealer for end of month, but currently I just add more coolant.

thanks a lot.
No. Just sounds like you have a coolant leak some where.
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Old 07-11-2014, 02:26 PM
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What are the sings of a blown head gasket?? E46

Quote:
Originally Posted by MalibuMafiaV View Post
No. Just sounds like you have a coolant leak some where.
Agree. May only leak when it comes up to temp and if its out of sight, you won't see it without getting under it, and it can drip off while moving and/or evaporates on the car while stopped.


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Old 07-11-2014, 02:31 PM
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Thats one of the drawbacks with that shield being there under the engine. It can hold a very large amount of fluids. So if its leaking somewhere that shield can catch it from your not going to see a leak on the ground at all.
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  #17  
Old 07-11-2014, 05:51 PM
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thanks guys, maybe i shall jack up the car and check the under cover for more...
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