Question about 2006 Mercedes-Benz B-Class

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Air is getting into the oil system and the moisture is causing white sludge like a blown head would

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  • Mike Butler
    Mike Butler May 11, 2010

    Are you making a lot of short trips with this vehicle?



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Blown head gaskets and cracked blocks allow water to escape from the coolant system into the bores and then into the sump.

The mix of oil and water produces mayonaisse or salad cream like gunk.

It also pressurises the cooling system and water will be blown out of the radiator header tank .

Only fix is a head off job

Posted on Sep 26, 2009

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Replace you PVC value

Posted on Sep 26, 2009


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2002 Dodge neon Problems with the head leaking?

It leaks what... coolant or exhaust gas?
If it's exhaust gases it's more likely to be the exhaust manifold gasket at fault.

If it's coolant leaking out somewhere it could be a hose/radiator/coolant tank, though coolant can also leak from the head gasket area.

A classic sign of a leaking head gasket is a creamy white/grey sludge on your oil dipstick. This is caused by coolant finding its way via a blown head gasket into the oil system

2002-dodge-neon-problems-head-leaking-drn4r4jcf5cpqfgonvky3zim-5-0.jpeg A creamy sludge on the dipstick - caused by coolant finding its way into the oil system because of a leaking head gasket.

Other indications of a leaking head gasket/head is overheating and rough running.

You can also try removing the cap from the coolant bottle and letting the engine idle. If bubbles continually appear this may be due to the exhaust gases finding their way into the cooling system via a leaking head gasket.

In most cases replacing a head gasket requires the cylinder head to be skimmed as well. This is because the alloy of the head tends to warp slightly.

A workshop would be able to diagnose a faulty head gasket within minutes. Having a head gasket replaced and the head skimmed isn't a cheap job.

Nowadays there are 'guaranteed head repair' additives available. Just follow the instructions on the can if you decide to use one. I personally haven't used such an additive.


Nov 06, 2015 | 2002 Dodge Neon


Oil Sludge In Rocker Box and Pipes

Oil sludge found in Air Cleaner, replaced PCV and filter and cleaned and had to replace filter in 6 months due to yellow oil sludge

Yellow sludge found in system, cleaned hoses replaced filter and PCV and six months later had to repeat process
Posted by xxxx on
Oil sludge can be caused by a few different things including a clogged pcv valve, which you say you have changed. I don't think you have head gasket/head problems as you say you've been using the vehicle for 6 months.

However, do check your oil dipstick and see if the same sludge (also known as 'mayonnaise') is on it. Mayonnaise on a dipstick is a symptom of a defective head gasket that is allowing coolant into the oil system.

If your vehicle looses/uses coolant this may be a sign of a faulty head gasket/head.

Very short- repeated - journeys can allow sludge to form , simply because on short journeys the engine does not reach its normal operating temperature. The engine is 'cool'.

It can also be caused by a faulty thermostat. If the thermostat is jammed in the open position it can take a long time for the engine to reach normal operating temperature. Other than changing the thermostat (maybe for one that opens at a higher temperature - a ' winter' thermostat) there's no practical way of checking it. Replacement is the easiest and cheapest option. It's not a difficult job.

It's not unknown for a thermostat to have been removed by a previous owner (for various reasons..). If you're going to check if there's a thermostat there - replace it anyway.

If you're not losing/using coolant and there's no mayonnaise on the dipstick it may well be due to repeated short journeys where the engine doesn't reach normal operating temperature - or the thermostat.

The reason that sludge - or 'mayonnaise' forms is because of water content/moisture. For every gallon of fuel your vehicle uses in the combustion process, it produces 1 gallon of water. The water vapour will condense in the coolest place - and in the engine this is the rocker box and pipes. If the engine is at normal operating temperature the sludge should not form in modern engines (it happened commonly on engines in the 70s and 80s..).

Another cause of sludge - though it is black sludge - as opposed to a creamy colour, is an egr valve that needs cleaning.

on Feb 05, 2016 | Cars & Trucks

2 Answers

1series 2005 bmw white smoke comes out of the tail

Either you have a head gasket problem or oil consumption problem

Sep 21, 2014 | Cars & Trucks

1 Answer

My 2007 Dodge Grand Caravan started to release a haeavy white smoke through the exhaust system for the first time. What could be the cause and the diagnosis?

sounds like a blown head gasket , have a compression check done, and check your oil dipstick and inside the radiator,, look for water droplets on the dipstick or a milky white sludge

Jul 13, 2011 | Dodge Caravan Cars & Trucks

2 Answers

There is white smoke coming from the exhaust shooting out a watery substance. the white smoke gets worse as i drive it. there is no water in the oil or milky sludge build up and dont need to add water.

This acts and sounds suspiciously like a blown head gasket. You can't fix it if it is. I suggest you check your oil for water (pull the dip stick, is the oil milky white?). Get your car to your mechanic as soon as you reasonably can before you cause much more damage if this is a blown head gasket.

Thanks for visiting today

Mar 05, 2011 | 1999 Mitsubishi Montero Sport

2 Answers

In my 2004 gm sierra there is no oil pressure. when i took the oil filter off it was filled with a sludge. the valve covers are also coated with an oil sludge. i have been loosing antifreeze but it could...

its usualt from lack of oil changes sometime in its life there are some sludge removers on the market. change it and run it and change it do not let it run with no psi tho

Feb 01, 2011 | 2004 GMC Sierra

2 Answers

Replaced heater but now losing coolant. Pelleted oil filler cap off & noticed a yellowish sludge inside. Normally this would be caused by blown head gasket but, its there any other cause for this?...

it means your coolant is getting into your lubrication system. generally but not always a bad gasket. you could have a crack somewhere too. this is not good.

Dec 23, 2010 | Dodge Durango Cars & Trucks

1 Answer

Fuel injectors were repaired for 400 bucks and white smoke is till pouring out of my exhaust and my gas usage is still above normal did I get ripped off. The mechanic at the garage said it would smoke...

I am corncerned about the smoke being white.
White smoke usually is from moisture in your exhaust system.
The moisture comes from water getting your engine cylinders by one of several ways.

1 Blown Head Gasket
2 Cracked Head
3 Cracked Cylinder

A rich gas condition causes black smoke
Oil burning causes blue smoke

Check your coolant level to make sure your not losing it into the engine vis a crack or bad gasket.

Good luck

Nov 26, 2010 | 1994 Ford Thunderbird

2 Answers

Excessive engine noise, 70lbs of oil pressure, moisture and white smoke coming out of exhaust on 1992 Isuzu Amigo 2.3

Coolant is mixing with the engine oil.Blown head gasket,or cracked,or warped head.

Feb 12, 2010 | 1992 Isuzu Amigo

1 Answer

I have an 89 jimmy with a 350v8 i noticed alot of moisture in ehaust lately i removed valve covers to install new aftermarket ones and both covers were coated across the top with white milky sludge what...

What you've got is most likely a leaking cylinder head gasket. When the water gets hot in the engine it can steam up and the white foamy stuff is the result..
The head gasket is most likely leaking between the water and the oil passages ...
You may want to run a pressure check on the cooling system. If you can pressurize it with the valve covers off, you may be able to hear a leak, but the pressure guage on the tester will show you for sure...
Head gasket replacement is an involved process,'s wise to have the heads checked for warpage (believe it or not they will warp a little). Even a warpage of a few thousandths of an inch (checked with a feeler gauge) can allow a head gasket leak to reoccur... A local auto machine shop can check and re surface if needed..

Oct 17, 2009 | 1998 GMC Jimmy

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