Found : head gasket oil leak on 2 used 2010 YARIS ...

[sickpuppy1]

Possibly it is a two piece gasket that is backed to a harder/metal sheet like material, and the pressure of torquing down the bolts makes it separate. Not necessarily a defect, but a byproduct of pressure makes it flare out a bit......Or I could be full of crap! LOL

[Hershey]

O.K.. . Was told the splitting can be common because of no pressure being applied at that area between 2 masses ( head / lower block ) . Live and learn . Torque can be issue too . Just trying to get to the source .

[Nu18F]

It's not uncommon to see a multi layer steel gasket split on the overhang however, if my eye's aren't deceiving me,that is a gap between the H/G , head and block, in post #143.

Not trying to start anything - just going by the photo posted.

[Hershey]

" It's not uncommon to see a multi layer steel gasket split on the overhang however, if my eye's aren't deceiving me,that is a gap between the H/G in post #143. "

Yes , there's a small gap ( circled w/ RED ) in the M.L.S. head cylinder gasket of the #1 cylinder that was installed the 1st few days of Sept. , 2010 with 23,747 miles on it . That part of gasket does stick out from the block as you can see in the photos . Need to ZOOM in for a better look . The digital camera we have isn't that great .

[yaris2010RS]

toyota put that black gasket maker in there? really? they made a mess of a job. the most recent pic i couldnt see the red circle. from what i saw it looks like the same type of gasket as the exhaust header

[Hershey]

" toyota put that black gasket maker in there? really? they made a mess of a job. "

Yes , this was the way we found it after the repair of H.C.G. at the TOYO service center . They also did not tighten the oil filter enough . Luckily I decided to look at it a few days after getting it back and it was so loose it had leaked to the bottom of the filter . I also was able to spin it off buy hand . Cleaned it off and retightened by hand along with a 1/4 turn of the cup / wrench . This is why we got TOYOTA to give us the free extended warranty , due to the shoddy work done on the engine .

[Hershey]

This is also the reason why we and our friends ( told them of our experience ) are hesitant to get the M.L.S. h.c.g. of the 2010s' replaced under warranty . He has 65,000+ miles on his 2010 3 door . He bought the 4 year / 125,000 PLATINUM extended warranty at time of purchase . So , he's keeping his fingers crossed for the car not to develop any issue with the oil leak of his YARIS after the warranty runs out . We're using his car as a guinea pig since we only put on about 15,000 miles a year , which is well below his yearly average .

[Hershey]

This picture is of a 2007 YARIS engine torn down at 102,000 miles , said to be due to an external oil leak and internal coolant leak . Good to know the PLATINUM extended warranty with 0 deductible is there as the mileage / years pile on .

[Hershey]

Top view of the black M.L.S. h.c.g.. The area circled in BLUE is where the gasket is split ( gap ) . The area in RED is where the h.c.g. leaks oil from underneath the gasket of the #1 cylinder . Picture below shows the split in H.C.G. , circled in RED .

[CB900F2]

Add me to the list of leaking head gasket

Checked about three weeks ago when I came across this thread, and cleaned up the area and oil is slowly coming back in the same area.

Anyone consider getting a coolant fluid analysis as there is a coolant passage just to the top left of the cyclinder#1 and wondering if the oil is making its way also in to the coolant in addition to leaking out?

[bronsin]

Originally Posted by CB900F2

Add me to the list of leaking head gasket

Checked about three weeks ago when I came across this thread, and cleaned up the area and oil is slowly coming back in the same area.

Anyone consider getting a coolant fluid analysis as there is a coolant passage just to the top left of the cyclinder#1 and wondering if the oil is making its way also in to the coolant in addition to leaking out?

Im curious if you could give an estimate of how much oil this is? Is it measureable on the dipstick? The question isnt is oil going into the coolant but is coolant burning in the combustion chamber? Which should be apparent from white smoke and lowered coolant level. Also if there IS oil in the coolant it will be seen in the radiator when you take the cap off. (engine cold please)

See any?

[Hershey]

If there's an internal coolant leak it would be very slight within the cylinder and most of it is likely to burn off within the cylinder . You'll notice there's more deposits in the #1 cylinder of the torn down engine above . We've just posted a U.O.A. in this section for the 2010 and no signs of coolant were present in the analysis . Plan to do oil analysis for it every 35 > 40,000 miles . Might get a compression test for the 2010 as well . Yes , there is some drop of the oil on the dipstick .

[Hershey]

There's been a few other members that claimed to have or possbily have the oil leak , but they've disappeared . . One said they found out through CARFAX that the head cylinder gasket was replaced on their used '09 and another discovered the oil leak when working under the car while installing fog lights . Maybe they're just playing with our heads .

[Hershey]

Originally Posted by CB900F2

Add me to the list of leaking head gasket

Checked about three weeks ago when I came across this thread, and cleaned up the area and oil is slowly coming back in the same area.

Anyone consider getting a coolant fluid analysis as there is a coolant passage just to the top left of the cyclinder#1 and wondering if the oil is making its way also in to the coolant in addition to leaking out?

Sorry to see that . You could get a U.O.A. to see if any coolant is present , like we did .

[Hershey]

THIPHIL , is the one that supposedly found oil on the back of the block while installing fog lights on his 2010 ( posted March 24 , '11 ) and then on MARCH 26th posted he was taking it to the dealer the following week . No word since .

[Hershey]

Then these's a post with a few pictures by GONZO452001 of possible oil leak in this thread on page 7 , post #123 . Never heard from again .

[Hershey]

Then there's this post ( 1/8/'11 , post # 83 , page 5 this thread ) by TXyaris finding the head cylinder gasket was replaced on his used 2009 by using CARFAX . Nothing since .

[Hershey]

Yesterday we stopped by the friends for a visit and to get pictures of the extent of the oil leak from the H.C.G. of their 2010 3 door bought new in October , 2009 . The last time I thoroughly cleaned the exposed part of the black M.L.S. head cylinder gasket and the surrounding area was October 19 , 2010 with around 49,000 miles on it . So , it's been close to 7 months since last inspection . There's now over 65,000 miles on it . There was no oil leaking from the valve cover gasket and no oil on the top or the back of the valve cover from oil changes done at a TOYO dealer . I've posted pics from our 2010 3 door of same areas that were recently cleaned as his was in October , 2010 to give the BEFORE ( cleaned ) and AFTER ( around 16,000 miles later ) . Here's what was discovered :