smoke after idling

[Vegeta]

I vote for water. Head gasket. Replace it its not that expensive to do if you dont go to the D..Stealers

 

[MFour]

White smoke can also be an indication that your brake booster is leaking brake fluid into the engine.

hmm never heard of that. How would the brake fluid get into the engine, please explain? Surely the brake booster, brake lines, in fact the entire brake system is separate from the engine. I have never seen a brake system on any vehicle where it is integrated into the actual engine block, it is a entirely separate and closed system.

If this has changed with new vehicle models I would really like to learn more.

 

[OomD]

hmm never heard of that. How would the brake fluid get into the engine, please explain? Surely the brake booster, brake lines, in fact the entire brake system is separate from the engine. I have never seen a brake system on any vehicle where it is integrated into the actual engine block, it is a entirely separate and closed system.

If this has changed with new vehicle models I would really like to learn more.

If the brake fluid leaks past the piston inside the brake's master cylinder then it can leak back into the vacuum booster, which is connected to the inlet manifold via a pipe (the inlet is what helps create the vacuum in the bake booster) and that way it could make its way into the engine.

However, this would signify the need for a new masterbrake (either whole cylinder or just seal kit) as well as the booster drum, as the booster drum is supposed to be sealed off from the master cylinder too. But both have rubber components that can wear.

This is very unlikly though on any vehicle younger than a couple of years.

 

[D3x!]

I vote for water. Head gasket. Replace it its not that expensive to do if you dont go to the D..Stealers

but no water in oil or oil in water that i can see and no bubbles in radiator, also surely then it would do it all the time?

 

[I.am.Sam]

Valve stem seals would be my guess

Best way to check it without opening the engine is the fact that there is little smoke at low refs but once refs pick up the smoke is gone.

i would also think its this cos the car does not lose any power or anything ...happened to my previous car where if i take off or put petrol then you would get white smoke ....

 

[I.am.Sam]

but no water in oil or oil in water that i can see and no bubbles in radiator, also surely then it would do it all the time?

if thats fine then i doubt its the gasket ...i blew 2 in 6 months ...

 

[D3x!]

i would also think its this cos the car does not lose any power or anything ...happened to my previous car where if i take off or put petrol then you would get white smoke ....

i am just confused why then not a darker smoke

if thats fine then i doubt its the gasket ...i blew 2 in 6 months ...

yeah apparently a head gasket will show quickly

 

[I.am.Sam]

yeah apparently a head gasket will show quickly

1st time i dont know how cos water was fine and everythign was fine but just blew and 2nd time well my fan switch and thermostat gave in ....

best to take to a mechanic and to check it out

they will immediately tell you

 

[D3x!]

1st time i dont know how cos water was fine and everythign was fine but just blew and 2nd time well my fan switch and thermostat gave in ....

best to take to a mechanic and to check it out

they will immediately tell you

taking to a buddy who is a mechanic this afternoon, gonna show him what it does and hook it up to computer hopefully.

 

[Pitbull]

i am just confused why then not a darker smoke



yeah apparently a head gasket will show quickly

Not always the case but true in most cases:

It depends on the amount of oil being burnt during combustion. Let's say you have a worn piston ring and lots of oil gets through it will burn black if not even with a worn piston ring and it only gets a little oil it will burn white.

 

[D3x!]

Not always the case but true in most cases:

It depends on the amount of oil being burnt during combustion. Let's say you have a worn piston ring and lots of oil gets through it will burn black if not even with a worn piston ring and it only gets a little oil it will burn white.

ok but wont it do this all the time then?

sorry not trying to dismiss your idea just trying to understand.

 

[MFour]

If the brake fluid leaks past the piston inside the brake's master cylinder then it can leak back into the vacuum booster, which is connected to the inlet manifold via a pipe (the inlet is what helps create the vacuum in the bake booster) and that way it could make its way into the engine.

However, this would signify the need for a new masterbrake (either whole cylinder or just seal kit) as well as the booster drum, as the booster drum is supposed to be sealed off from the master cylinder too. But both have rubber components that can wear.

This is very unlikly though on any vehicle younger than a couple of years.

Interesting, never heard of this happening before, and totally did not think about vacuum pipe. Thanks for the reply! Something I need to learn more about, quite clearly

 

[Pitbull]

ok but wont it do this all the time then?

sorry not trying to dismiss your idea just trying to understand.

Yes it will, if it is a piston ring. If not it only does it when the oil accumulate at the top of the valves under the tappet cover. Like when the car is at low revs. If the car picks up revs the oil is sucked to the sub-assembly so you won't get the smoke all the time since the oil isn't leaking into the valves from the top of the head when at high revs.

 

[D3x!]

Yes it will, if it is a piston ring. If not it only does it when the oil accumulate at the top of the valves under the tappet cover. Like when the car is at low revs. If the car picks up revs the oil is sucked to the sub-assembly so you won't get the smoke all the time since the oil isn't leaking into the valves from the top of the head when at high revs.

ok thanks

hopefully it is something small and not a huge repair

 

[OomD]

Interesting, never heard of this happening before, and totally did not think about vacuum pipe. Thanks for the reply! Something I need to learn more about, quite clearly

Another telltale sign of leaking master cylinders, off course would be that your brake pedal depresses deeply the first time or two that it is used, so whenever you need to brake you will have to pump the brakes a bit. Or a slow leak could cause you to have to pump the brakes say, every morning or so. But if your brakes never need pumping then there's no leak there.

 

[Pitbull]

Another telltale sign of leaking master cylinders, off course would be that your brake pedal depresses deeply the first time or two that it is used, so whenever you need to brake you will have to pump the brakes a bit. Or a slow leak could cause you to have to pump the brakes say, every morning or so. But if your brakes never need pumping then there's no leak there.

On this topic...

My Bakkie's ABS breaks, when it was a cold evening they are extremely hard in the morning and i have hardly any breaks. I need to push it hard a couple of times and then it's fine. Do you have any idea what that could be?

 

[D3x!]

Another telltale sign of leaking master cylinders, off course would be that your brake pedal depresses deeply the first time or two that it is used, so whenever you need to brake you will have to pump the brakes a bit. Or a slow leak could cause you to have to pump the brakes say, every morning or so. But if your brakes never need pumping then there's no leak there.

no brakes are solid, car drives like a beaut in fact

 

[SaiyanZ]

Does your dad mostly do short trips with the car? If so, it is most likely steam. I get steam coming out from my exhaust due to staying close to work and mostly doing short trips. Apparently moisture builds up in the engine due to it not always having time to warming up completely. Doing a long trip every now and again will clear up the smoke.

 

[D3x!]

Does your dad mostly do short trips with the car? If so, it is most likely steam. I get steam coming out from my exhaust due to staying close to work and mostly doing short trips. Apparently moisture builds up in the engine due to it not always having time to warming up completely. Doing a long trip every now and again will clear up the smoke.

just got the car, the car used to do very short trips, we drove it around 100km's yesterday and still did it afterwards after idling

you can literally stop car, rev no smoke, leave to idle a bit, rev smoke.

 

[D3x!]

JUST FYI

I found a very nice site to get manuals etc if you own a hyundai

http://www.hmaservice.com/

you have to register though, and use IE to register