Crack in engine, what should i do?
Crack in engine, what should i do?
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Discussion

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
Hello there! I am new to the forum as well for car buying
I purchased a 120i 2008 a few weeks a go with 88k kilometers and everything was fine. A few days a go while i was going to grocery shop (quarantine) i noticed blue smoke, i thought about gaskets, to change them, but yesterday i wanted to look something and i found this....

So, what should i do? This my first car, feeling bad, stupid and sad... hope any comments to see what could it be, if i just should sell that thing for a way lower price, try to repair...
Any way, thanks in advance.

clarkson22

471 posts

194 months

Saturday 4th April 2020
quotequote all
That's just the exhaust manifold ? Is smoke actually coming out of the crack? Either replace the manifold or get someone to weld it pal, it's not a get rid of the car problem mate , easily sorted.

Riggie

182 posts

155 months

Saturday 4th April 2020
quotequote all
clarkson22 said:
That's just the exhaust manifold ? Is smoke actually coming out of the crack? Either replace the manifold or get someone to weld it pal, it's not a get rid of the car problem mate , easily sorted.
What he said

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
clarkson22 said:
That's just the exhaust manifold ? Is smoke actually coming out of the crack? Either replace the manifold or get someone to weld it pal, it's not a get rid of the car problem mate , easily sorted.
Hello clarkson! Thanks for the reply. I am not really sure if is the exhaust manifold, i have not noticed smoke coming out of it.
This is the location of that part

cossy400

3,465 posts

214 months

Saturday 4th April 2020
quotequote all
efra486 said:
clarkson22 said:
That's just the exhaust manifold ? Is smoke actually coming out of the crack? Either replace the manifold or get someone to weld it pal, it's not a get rid of the car problem mate , easily sorted.
Hello clarkson! Thanks for the reply. I am not really sure if is the exhaust manifold, i have not noticed smoke coming out of it.
This is the location of that part
Is the cracked bit closer to the BMW badge on the top. (as you stand in front of the car?)

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
cossy400 said:
Is the cracked bit closer to the BMW badge on the top. (as you stand in front of the car?)
If i stand in front of the car, no sir, it is located like below the 3 stripes before the B


brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
Riggie said:
clarkson22 said:
That's just the exhaust manifold ? Is smoke actually coming out of the crack? Either replace the manifold or get someone to weld it pal, it's not a get rid of the car problem mate , easily sorted.
What he said
I am struggling to work out whether it is the manifold or the heat shield, but if it is the manifold then it is covered in oil which is a pretty likely culprit for the smoke.
I know nothing about that engine but from the position I would guess the cam cover gasket is leaking?

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
brman said:
I am struggling to work out whether it is the manifold or the heat shield, but if it is the manifold then it is covered in oil which is a pretty likely culprit for the smoke.
I know nothing about that engine but from the position I would guess the cam cover gasket is leaking?
What if it is the heat shield?
And yes, i am almost sure it is also leaking oil, but im not sure if it because of the gasket or the crack.

MitchT

17,156 posts

239 months

Saturday 4th April 2020
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brman said:
... from the position I would guess the cam cover gasket is leaking?
If it's a cam cover gasket I wouldn't worry. Seems quite common for them to leak. I had mine changed because it was leaking and the new one started to do the same before long. It never seems to affect the oil level so it must look worse than it actually is.

brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
A thought, you don't say where the smoke was coming from but I assume under the bonnet or you would not be looking there?

Also, what sort of smoke? If the manifold was cracked and leaking I would expect at worse a slight gray haze. It will smell but there should not be clouds of smoke. If a decent amount of more light gray smoke then I would say it is likely oil burning off (or something else burning....). Oil burning would match a leak from the gasket and what is visible in that picture.

You also ask whether you should just sell it on. That is up to you but, if my guess is right, it should be a pretty easy fix (for a competent DIYer) and certainly isn't a sign the car is a dog. Like I said, I don't really know that engine but older bmws have a bit of a reputation for oil leaks from cam covers, oil filters etc.

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
brman said:
A thought, you don't say where the smoke was coming from but I assume under the bonnet or you would not be looking there?

Also, what sort of smoke? If the manifold was cracked and leaking I would expect at worse a slight gray haze. It will smell but there should not be clouds of smoke. If a decent amount of more light gray smoke then I would say it is likely oil burning off (or something else burning....). Oil burning would match a leak from the gasket and what is visible in that picture.

You also ask whether you should just sell it on. That is up to you but, if my guess is right, it should be a pretty easy fix (for a competent DIYer) and certainly isn't a sign the car is a dog. Like I said, I don't really know that engine but older bmws have a bit of a reputation for oil leaks from cam covers, oil filters etc.
No, it does not come from under the bonnet, It is a bluish smoke coming out of the exhaust, yea sorry i did not mention it, it comes from the exhaust.
It smells which i think it could be the oil burning.
I really dont want to sell it as i really like the car. It is just that when i saw that crack i freaked out but if it is an easy fix, i certainly would be keeping it.

I really appreciate your answer smile

brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
efra486 said:
brman said:
I am struggling to work out whether it is the manifold or the heat shield, but if it is the manifold then it is covered in oil which is a pretty likely culprit for the smoke.
I know nothing about that engine but from the position I would guess the cam cover gasket is leaking?
What if it is the heat shield?
And yes, i am almost sure it is also leaking oil, but im not sure if it because of the gasket or the crack.
You should be able to feel around above the manifold. If the gasket at that point is wet with oil then it is the gasket, not the manifold. Maybe clean it well first then drive for a bit so you can pinpoint the source of the leak.

brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
efra486 said:
brman said:
A thought, you don't say where the smoke was coming from but I assume under the bonnet or you would not be looking there?

Also, what sort of smoke? If the manifold was cracked and leaking I would expect at worse a slight gray haze. It will smell but there should not be clouds of smoke. If a decent amount of more light gray smoke then I would say it is likely oil burning off (or something else burning....). Oil burning would match a leak from the gasket and what is visible in that picture.

You also ask whether you should just sell it on. That is up to you but, if my guess is right, it should be a pretty easy fix (for a competent DIYer) and certainly isn't a sign the car is a dog. Like I said, I don't really know that engine but older bmws have a bit of a reputation for oil leaks from cam covers, oil filters etc.
No, it does not come from under the bonnet, It is a bluish smoke coming out of the exhaust, yea sorry i did not mention it, it comes from the exhaust.
It smells which i think it could be the oil burning.
I really dont want to sell it as i really like the car. So if it is an easy fix, i certainly would be keeping it.

I really appreciate your answer smile
Right, if it is coming out of the exhaust then the oil leak is a red herring. Forget that.

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
brman said:
You should be able to feel around above the manifold. If the gasket at that point is wet with oil then it is the gasket, not the manifold. Maybe clean it well first then drive for a bit so you can pinpoint the source of the leak.
Okay, i will do that later today and I will be updating smile

brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
brman said:
Right, if it is coming out of the exhaust then the oil leak is a red herring. Forget that.
When does it do it?
Hot or cold engine?
Stationary at idle?
Driving gentle?
Driving hard?
Only when revving it hard or all the time?

brman

1,233 posts

139 months

Saturday 4th April 2020
quotequote all
and another question. Are there any warnings on the dash? (eg check engine light)

E-bmw

13,524 posts

182 months

Saturday 4th April 2020
quotequote all
It looks like there are a couple of possibly associated problems.

Firstly it is really difficult to tell exactly what the cracked part is, it could, as has been stated, simply be a manifold, I think it looks more likely to be a web at the top of the engine that the cam cover bolts to, but can't be sure.

Secondly as there is oil in what is a VERY common place on these engines it seems that the cam cover gasket needs replacement & possibly if that is the case the both are definitely associated.

Your first port of call if you bought it from a dealer is to take it back & show/tell them the issue.

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
brman said:
When does it do it?
Hot or cold engine?
Stationary at idle?
Driving gentle?
Driving hard?
Only when revving it hard or all the time?
It certainly does not occur when a cold start.
It has happened when it is idle at a traffic light or sit for a minute or 2, when i shift into first and start accelerating, it is when you can see the blue smoke coming out.
It happens almost always when revving light, not when revving hard.

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
brman said:
and another question. Are there any warnings on the dash? (eg check engine light)
None, and and the level of oil is ok,

efra486

Original Poster:

11 posts

78 months

Saturday 4th April 2020
quotequote all
E-bmw said:
It looks like there are a couple of possibly associated problems.

Firstly it is really difficult to tell exactly what the cracked part is, it could, as has been stated, simply be a manifold, I think it looks more likely to be a web at the top of the engine that the cam cover bolts to, but can't be sure.

Secondly as there is oil in what is a VERY common place on these engines it seems that the cam cover gasket needs replacement & possibly if that is the case the both are definitely associated.

Your first port of call if you bought it from a dealer is to take it back & show/tell them the issue.
Not from a dealer, it was bought through some individual. But i will take it to the mechanics as soon as i can.