In this video i'm going to show you what you should do if you have oil in your coolant or Antifreeze
there's a few different things that can cause this and before you can jam a head gasket
i'll go over some stuff you can check in this video
Okay we need to figure out, why we have oil in the coolant on this volkswagen?
customer complained that the
coolant light was flickering on and off and
upon further inspection we found the coolant reservoir was full of oil or transmission
fluid no thermos unsure at this point but as you can see there that does not look like coolant
So it's got a oil mixture in there the coolant overflow reservoir so we need to find out how oil
is getting in this engine coolent system there's only a few ways that it can get in here on this vehicle would be the oil cooler
transmission cooler or the head gasket on some other vehicles it can be also be caused by intake gasket but not
on this vehicle so
most likely caused on this volkswagen
seeing how this customer is not complaining that with any overheating issues or anything like that would be this oil cooler so
what we're gonna do is we're gonna go ahead and pull this thing off and test it today
and
Be able to show, you how to tell if that is what's causing
all this oil in this coolant reservoir
So that's definitely a problem i've checked the
engine oil dipstick and i've also checked the transmission fluid and there's no signs of antifreeze in the engine oil and
there was no signs of coolant in
The transmission fluid itself so that's where we're at, so far
Let's go ahead and show you how to get this oil cooler off so we can test it
First i'm gonna remove yet two coolant hoses that go to the cooler itself
this vehicle uses the coolant to actually cool the oil
so the antifreeze is flowing through this housing as it enters the oil filter in turn cooling the engine oil off
now not all vehicles have oil coolers but if yours does which you can find out by doing a quick google search
That's gonna be the first thing you probably
are going to want to check.
if your vehicle doesn't another very very common cause of oil in the corn would be through your transmission cooler
and normally your transmission cooler runs through the radiator now on this particular
volkswagen working on it has its own cooler that actually bolts on top of the transmissions so
By tab i'll go more into that and some of my other videos so be sure to subscribe to my channel
well this is probably something i a
DIY could do themselves you know at home in their driveway it's relatively easy to check
there's only one bolt that holds this cooler on you'll see
later on the video here
So now i'm gonna reach the vehicle and just take an oil filter off
this can get a bit messy you're definitely gonna wanna walk you're definitely gonna want a lot some kind of
catch pan or drain bucket
now that we got this oil filter off you can see there's
a 27 millimeter nut
You're gonna have to remove
broke it free when i spin it out by hand
So the only tools you're gonna need are some new nose pliers and a 24 millimeter socket with a wrench
Now leave links to everything you need in the video description below then once you have that?
24 millimeter bolts off you should be able to pull the cooler
right down
from there so we can take this oil cooler out and
Test it and see if that's a reason why we're getting oil in the engine coolant?
there's a gasket between the cooler and the engine block
And here's a little better view of where that cooler wilts up to the engine block
alright now that we got this cool arlo i'm going to cap the ends of it
because what we're gonna be doing is we're gonna be
applying air
into this cooler to see if it's leaking and we're gonna submerge it in water just check for any bubbles now another thing
you can do with this as well is
Just, cover one end with a finger and then suck through it and see if see if it holds vacuums
just, be sure you clean and good cuz obviously coolant is
poisonous i actually did this before i
Did this test and i wasn't able to feel any leaks so i'm gonna proceed with pressurized air to see if it leaks
basically coolants running through these passages and leaking
into the oil
this is what we're suspecting here
So here i'm just putting compressed air
in one side with the other side cap now i'm gonna place it in a game bin and syllables water
So we can
you can put compressed air inside this underneath the water to see if it's bubbling to check for any leaks
i'm gonna go ahead and speed this part up real quick
all right our bucket is full of water and
We're gonna go ahead and play air and this and see if we see any bubbles coming out
Okay so i get about
120 psi of pressure in this oil cooler and i'm not seeing any bubbles so
as far as this test goes this cooler is actually passing
Now, i'm not sure this is 10% reliable test because temperature conditions change?
There's a lot of variables you know so if this thing gets hot or cold
it could be leaking under certain
circumstances right now underneath this water i'm not finding any leaks
So this would be a good time to go into some of the other things we'll check
I'm gonna go ahead and get this engine oil cooler reinstalled so we can
hopefully find a definitive answer as, to why there is oil in this coolant reservoir
So next we're probably gonna try and do a we're gonna do a co test on this to test ahead gaskets
so what i have here is just a
It's a co tester basically what it's gonna do is test for a combustion gas i have another video on this?
On testing for a bad head gasket i'll leave that in the video description below
That goes into good detail on how to tell if you have a bad guy to gasket so we just want to make sure
We have no combustion gas and if we do this tester is the fluid and that's gonna turn yellow
and i'm doing this with the engine running would like to say this checking for combustion gas so
and from the looks of it we're not having any head yet i'm not picking up any
combustion gas in this cooling system which is a good thing
she wasn't complaining of any overheating issues
The fans and everything seem to be working fine so i wasn't really suspecting a head gasket issue
The only other thing i did check on this vehicle?
was the transmission
fluid itself now normally you'll have a dipstick you can pull the dipstick out and
if your transmission cooler is leaking
typically your transmission fluid gentle look very similar to the way this court looked in this engine it's gonna be all frothy frothy looking and
you, know you can tell it's mixed with a liquid
corn so
On this one i actually had to pull the drain plug and the fluid was nice and clean there was no evidence is there any
kind of mixture of any sort so i'm not concerned with a transmission cooler at this point and
The way this test is the ceo test is going on the head gaskets i'm not really that concerned
With that guys could see there this is a nice strong running engine it's not what we're eating there's no external leaks from the head
Guys, here that i can see so?
We're gonna go ahead and go with the oil cooler on this i'm suspecting probably when it gets hot or in the certain conditions it's
leaking and i'm pretty confident that's what's gonna fix this vehicle it's pretty common problem on
volkswagens but every car is different and transmission coolers are very common on gm's and other makes and models
Any question of the comments be sure to leave them below i'll answer all of them
Subscribe to my channel and if this was helpful be sure to hit the thumbs up button
appreciate it thanks Flat Rate Mechanic
 
