Question about 2001 Volkswagen Passat

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VW Caddy - black oil in coolant tank. Runs fine, no smoke, no froth. Is it the oil cooler - is it safe to drive as does not appear to be overheating

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  • 298 Answers

This is the transmission cooler,it feeds off of the coolant system.get it fixed right away,because the next problen will be in all of the coolant lines.
Sorry to say but this happened to me before,I ended uup with a fried vr6 and 8,000 bucks of parts and labor for a 58 dollar part that went bad.
please flush the transmission as well as the cooling system.I just about gurantee that this is your problem, believe me I know volkswagens.Gary

Posted on Oct 23, 2013

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Posted on Jan 02, 2017

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  • 234 Answers

SOURCE: oil in water resovour vw 2002 passat

This is probably a head gasket problem and not an oil cooler problem.

The oil cooler is fairly easy to test.

Remove the cooler from the engine but do not disconnect cooling lines and then pressurize the cooling system. You can use a radiator test tool to put pressure on the cooling system and look for leaks. If it leaks, replace it.

You may also be able to bypass the oil cooler altogether if it leaks.

The head gasket is another story.

Get a 1/4" pipe to spark plug fitting and put a male air coupling fitting in it.

Then you can charge the cylinders with air from your compressor.

Make sure each cylinder that you test is at top dead center so that the valves are closed.

If air bubbles into your coolant, you found your problem.

If air leaks out your intake you have a bad intake valve

If air leaks out your exhaust you have a bad exhaust valve etc.


If you find this useful, please take the time to rate it.

Tim

Posted on Apr 15, 2009

  • 225 Answers

SOURCE: 2006 VW tdi black smoke while accelerating

Hi
The only sensible way forward is to get a list of fault codes from the onboard diagnostic system and take it from there. You could either go to a VW dealer, or if you are technically minded you could buy a £15 interface cable, download some free "VAG diagnostic software" and run it on a portable computer.
There are lots of possible reasons for the problem and guessing will not really help. If these suggestions turn out to be sound, please give my reply a "Fixya!"rating, If they do not, please hold off rating and add a comment with more details so I can try to help you further. Cheers, D

Posted on Dec 02, 2008

Selvol
  • 115 Answers

SOURCE: oil in water resovour vw 2002 passat

Could be just the OIL COOLER. VW IS CORRECT.
If the oil cooloer fails internely you will have a mix of coolant and oil. In the engine and in the Radiator,

But not to say the other guys were wrong...

Posted on Jun 18, 2009

  • 44 Answers

SOURCE: smoking caddy van 1.9 tdi

Check the oil fill cap and the radiator cap, see if you have a milky scum accumulation on either one, can indicate a blown head gasket or a cracked cylinder where the oil is burning and allowing water intothe hot cylinder which causes white smoke to be emmitted from tailpipe.

Posted on Sep 29, 2009

steve_e_uk
  • 1675 Answers

SOURCE: I have a vw caddy tdi diesel van blowing smoke

a couple of things it could be , 1 it might be leaking valve guides+seals if they are leaking the oil drips on the pistons and when started it smokes for a while but eventually clears. 2 piston rings, if the bore is scored or you have a broken piston ring this will cause it to smoke, when engine gets to presure and the oil is thin due to being warn it can seep past either the broken ring or through the score on the bore, you can get it presure checked for that one to see if its 2. 3, being a diesel if the timing is slightly out this would cause smoke and it would be getting to much fuel in the pots to burn and you get a build up of fule that does not burn correctly, but you get other problems with that one, slow acceleration, jerkiness, that sort of thing....anyway hope that helps

Posted on Feb 08, 2010

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