I NEED Boost... Opinions puh-lease - Page 25 - Toyota Yaris Forums

Focus_Sh1ft · 01-16-2013, 12:56 PM

I did do the test again (throttle open, engine cold) and got 210 across all four. Assuming it is truly the head gasket, it should be interesting to see how it failed. I'm guessing coolant in the cylinder(s) based on what was found.

yaris2010RS · 01-16-2013, 10:57 PM

Thats odd...... if there is coolant getting in it would most likely be on the return (down) stroke so on the compression stroke you should see a loss of pressure.

What made you lean towards coolant in the cylidners?

Focus_Sh1ft · 01-18-2013, 01:24 PM

Ok, head is off. Look at the pictures first...

There's little bits of aluminum everywhere on the gasket. It's also covered in coolant.

I can't find any major cracks or anything wrong with the gasket. However, look at the cylinders. I don't know what they look like normally, but mine look like they could be warped. Each of the corners looks slightly burnt also.

Anything else look out of the ordinary? I still have to check for warpage on the head.

pimp my yaris · 01-20-2013, 10:14 PM

If coolant enters the cylinder the top of the piston will be washed clean and it is very noticable. Your pistons look equally dark with slight carbon deposits. Pretty normal. Did you disconnect the fuel pump or the injectors when you did the compression test? If the injectors are still squirting fuel during the compression test the fuel will create a excellent seal for the rings and give you false readings. The test should be done dry, and then retested with a little oil in each cyl. to compare the difference.

Focus_Sh1ft · 01-21-2013, 11:57 AM

Yep, no cylinder washing...

I removed the two efi fuses when I did the compression tests.

At this point, I'm just going to replace the head gasket, have the head decked, and throw it all back together. It's been almost two months and I still am no closer to solving this... VERY frustrating.

yaris2010RS · 01-21-2013, 11:29 PM

IMO put her back together and see if shes magically back to life

Focus_Sh1ft · 01-22-2013, 12:15 PM

Quote:

Originally Posted by yaris2010RS

IMO put her back together and see if shes magically back to life

At this point, that's basically where I'm at. I'm convinced magic is the only thing that will solve this problem lol...

Hopefully something turns up with the head. On the flip side, at least I'll have completely ruled out any type of mechanical failure.

cali yaris · 01-22-2013, 12:36 PM

^ It's a small club of people who have been able to look at their piston tops.

fnkngrv · 01-22-2013, 01:14 PM

Quote:

Originally Posted by cali yaris

^ It's a small club of people who have been able to look at their piston tops.

Ain't that the truth!

yaris2010RS · 01-22-2013, 01:33 PM

Quote:

Originally Posted by cali yaris

^ It's a small club of people who have been able to look at their piston tops.

http://www.yarisworld.com/forums/showthread.php?t=43412

We will see.....

Focus_Sh1ft · 01-25-2013, 11:25 PM

Got the head back today, no warpage.

Also, big thanks to Adrian (fnkngrv) for sending me an extra timing chain cover.

Should have everything back together early next week...

fnkngrv · 01-25-2013, 11:29 PM

Quote:

Originally Posted by Focus_Sh1ft

Got the head back today, no warpage.

Also, big thanks to Adrian (fnkngrv) for sending me an extra timing chain cover.

Should have everything back together early next week...

No problem man. You have been a great resource for information as I was doing my turbo install and tweaks along the way. Your knowledge helped me immensely along with Carlos, Garm, Scott, and Brian.

Focus_Sh1ft · 01-28-2013, 09:43 PM

^ I wish you did chime in sooner, because it took me tearing into the engine to realize the head gasket wasn't the issue lol.

Made some progress today. However, it all came to a grinding halt when I stripped one of the head bolts...

I got it pretty tight before it happened, the others are only about 1/4 turn tighter and are the correct torque. I'm severely worried that will be enough to cause compression loss though...

Once I get the timing chain back on (and timing aligned), could I possibly run the starter and do a normal compression test? Really don't want to put everything back together just to find it was [even more of] a waste of time.

Focus_Sh1ft · 01-29-2013, 03:39 PM

Did a faux leak down test of sorts. Put 140 psi of compressed air in each cylinder at TDC, valves closed. I don't have the gauges to measure percentage, but all four lost air at a nearly consistent rate, so we're still good to go

Focus_Sh1ft · 01-31-2013, 07:39 PM

Engine is back together and is running the exact same.

So, it's back to the drawing board... At least I didn't make things worse lol.

pimp my yaris · 01-31-2013, 08:59 PM

Quote:

Originally Posted by Focus_Sh1ft

Engine is back together and is running the exact same.

So, it's back to the drawing board... At least I didn't make things worse lol.

That blows, I think all of us that have fucked around with cars long enough know your pain. I know I been their

CTScott · 01-31-2013, 09:13 PM

Quote:

Originally Posted by Focus_Sh1ft

Engine is back together and is running the exact same.

So, it's back to the drawing board... At least I didn't make things worse lol.

Did you ever get a chance to have someone connect up a techstream?

Focus_Sh1ft · 02-01-2013, 11:36 PM

Quote:

Originally Posted by CTScott

Did you ever get a chance to have someone connect up a techstream?

Yes, at the dealership. All we got were P0300-0303 and P0172 (none of which were showing up on my code readers...). Everything else appeared to be working okay with the ECM.

Things are definitely beyond desperate at this point. Let's just say I never thought I'd bring any car I ever owned to a dealership.

I've come up with a few other things to check, but at this point it's just taking shots in the dark...

01-16-2013, 10:57 PM	#2
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,886	Thats odd...... if there is coolant getting in it would most likely be on the return (down) stroke so on the compression stroke you should see a loss of pressure. What made you lean towards coolant in the cylidners? __________________ If it has boobs or wheels sooner or later your gonna have problems with it

01-21-2013, 11:29 PM	#6
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,886	IMO put her back together and see if shes magically back to life __________________ If it has boobs or wheels sooner or later your gonna have problems with it

01-22-2013, 12:36 PM	#8
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,857	^ It's a small club of people who have been able to look at their piston tops. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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01-16-2013, 12:56 PM	#1
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	I did do the test again (throttle open, engine cold) and got 210 across all four. Assuming it is truly the head gasket, it should be interesting to see how it failed. I'm guessing coolant in the cylinder(s) based on what was found.

01-18-2013, 01:24 PM	#3
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Ok, head is off. Look at the pictures first... There's little bits of aluminum everywhere on the gasket. It's also covered in coolant. I can't find any major cracks or anything wrong with the gasket. However, look at the cylinders. I don't know what they look like normally, but mine look like they could be warped. Each of the corners looks slightly burnt also. Anything else look out of the ordinary? I still have to check for warpage on the head.

01-20-2013, 10:14 PM	#4
pimp my yaris C'est la vie Drives: 2009 2 door hatchback Join Date: Aug 2009 Location: chicago Posts: 482	If coolant enters the cylinder the top of the piston will be washed clean and it is very noticable. Your pistons look equally dark with slight carbon deposits. Pretty normal. Did you disconnect the fuel pump or the injectors when you did the compression test? If the injectors are still squirting fuel during the compression test the fuel will create a excellent seal for the rings and give you false readings. The test should be done dry, and then retested with a little oil in each cyl. to compare the difference.

01-21-2013, 11:57 AM	#5
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Yep, no cylinder washing... I removed the two efi fuses when I did the compression tests. At this point, I'm just going to replace the head gasket, have the head decked, and throw it all back together. It's been almost two months and I still am no closer to solving this... VERY frustrating.

01-25-2013, 11:25 PM	#11
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Got the head back today, no warpage. Also, big thanks to Adrian (fnkngrv) for sending me an extra timing chain cover. Should have everything back together early next week...

01-28-2013, 09:43 PM	#13
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	^ I wish you did chime in sooner, because it took me tearing into the engine to realize the head gasket wasn't the issue lol. Made some progress today. However, it all came to a grinding halt when I stripped one of the head bolts... I got it pretty tight before it happened, the others are only about 1/4 turn tighter and are the correct torque. I'm severely worried that will be enough to cause compression loss though... Once I get the timing chain back on (and timing aligned), could I possibly run the starter and do a normal compression test? Really don't want to put everything back together just to find it was [even more of] a waste of time.

01-29-2013, 03:39 PM	#14
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Did a faux leak down test of sorts. Put 140 psi of compressed air in each cylinder at TDC, valves closed. I don't have the gauges to measure percentage, but all four lost air at a nearly consistent rate, so we're still good to go

01-31-2013, 07:39 PM	#15
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Engine is back together and is running the exact same. So, it's back to the drawing board... At least I didn't make things worse lol.