View Full Version : Opinions on what I'm looking at

04-10-2015, 08:56 PM
I've got a pretty good idea of what I'm looking at here but I wanted a second opinion.

The shot with the nut is on the back side of the manifold where it bolts to the turbo. The other shot is from the top of the manifold.

I do appear to have some unexplained coolant loss.

http://i304.photobucket.com/albums/nn195/gowron100/e3b01ed7-b084-4a5c-9ec3-86876546761c_zps4hr9ziv2.jpg (http://s304.photobucket.com/user/gowron100/media/e3b01ed7-b084-4a5c-9ec3-86876546761c_zps4hr9ziv2.jpg.html)

http://i304.photobucket.com/albums/nn195/gowron100/caab6c7f-9a0a-40fb-83c0-1e554bc09746_zpspqzqk58x.jpg (http://s304.photobucket.com/user/gowron100/media/caab6c7f-9a0a-40fb-83c0-1e554bc09746_zpspqzqk58x.jpg.html)

04-10-2015, 09:24 PM
I would agree that it seems you have coolant loss. Second pic is that a crack?

04-11-2015, 12:09 AM
How is the coolant getting there tho? Turbo need a rebuilds?

04-11-2015, 04:40 AM
Is it through the turbo or is the coolant coming through the exhaust/cylinder? Do your plugs look fine?

04-11-2015, 01:18 PM
Tim, yes, I'm afraid that's a crack. It wasn't there a couple of weeks ago when I did the oil change. There wasn't any of the white residue on the top of the manifold. I don't think there was anything on the back either but I didn't pay a lot attention to it either.

I haven't pulled the plugs yet. Just fount this yesterday so I'll have to do that. The oil looks OK. It's not milky or anything like you'd expect with a blown head gasket leaking into the coolant passages. I did the exhaust gas test on the coolant system about 6-8 months or so ago and that was OK at that time.

I read a couple of places about the coolant seals in the turbo being a possible source. I'm not sure though how the leaking coolant would go up into the top flange or into the manifold though.

Looks like I've got more work to do.

04-12-2015, 07:19 PM
I didn't have a chance to pull the plugs but I did bypass the coolant lines to the throttle body. I read that sometimes coolant gasket in the throttle body will leak. I don't really figure that is the problem but I thought I'd try it since it was a pretty simple thing to do.

I didn't notice this till recently and I did have the throttle body apart when I did the 3rd gen electronics conversion to change out the fuel rail and injectors. I'll run it for a few days and see what the coolant level looks like.

04-13-2015, 06:09 PM
Id compress air into my cylinders with my rad cap popped to see if I get any bubbling. Hows your turbos shaft play? It looks like its coming from the engine into the turbo through the exhaust, whatever it is.

04-14-2015, 02:39 AM
When I changed the downpipe out last year I checked the shaft play then and it was good.

I've got pull the plugs and see what they look like and I'll try the compressed air test too. I'm like you Luni, I think it's coming through the engine and not the turbo seals. More checking though.

04-23-2015, 09:38 PM
OK, I had time to day to pull the plugs. As my luck has been running, only #1 & #3 came out easily. #2 & #4 would budge and I didn't want to take a chance on screwing up the head.

So here are pics of 1 & 3.

http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/2015-04-23%2016.59.46_zpsei2exbk9.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/2015-04-23%2016.59.46_zpsei2exbk9.jpg.html)
#1 plug

http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/2015-04-23%2016.58.30_zps6pmrgpug.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/2015-04-23%2016.58.30_zps6pmrgpug.jpg.html)

#3 looks about right to me. There are probably 20K on the plugs. They're iridium. #1 looks a little funny but I'm not sure that it's related to coolant. The oil still looks good but I've gone through about 1/3 of gallon of coolant this week in about 250-300 miles so there's something going on. I found that I've got oil in the spark plug tubes for #1 and #2.

On top of this problem I started getting a popping noise in the front when turn left. It sounds like it's coming from the right side. Pretty sure in this case it's the CV joint. So I guess I had that bastard to the list of things that have to be fixed.

04-25-2015, 12:04 AM
Well I got plugs #2 & #4 out this evening.

Here's what they looked like. Disregard the oil on #2. There's oil leaking into the spark plug tube.

http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/20150424_185047_zpswebeskvf.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/20150424_185047_zpswebeskvf.jpg.html)
http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/20150424_185038_001_zpsbeb5rj4n.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/20150424_185038_001_zpsbeb5rj4n.jpg.html)
Plug #2

http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/20150424_190152_zpsdjh90fnq.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/20150424_190152_zpsdjh90fnq.jpg.html)
http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/20150424_190148_zpsiwdv6ubm.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/20150424_190148_zpsiwdv6ubm.jpg.html)
Plug #4

I'm rather concerned that plug 2 is a little too clean compared to the other three. I couldn't find any good pictures when I Googled for spark plugs burning coolant. Several posts I did find on the web did talk about the plugs being very clean looking in the cylinders burning the coolant. The other three are ashed up pretty good which makes sense since the engine runs pretty rich it seems. I think that would also account for the coolant showing up around the joint between the manifold and the turbo.

What do you guys think?

04-25-2015, 04:04 AM
Whats the gap on those?

04-25-2015, 04:53 PM
I only checked one of them, #2 I think. It was around 0.035. They're probably blown out a bit. They've been in there a while.

04-28-2015, 09:34 PM
Is this why you think you need a head gasket?

You might, but a couple of things here;

There are NO coolant seals in the turbo, it's a separate water jacket around the shaft housing. Like the water jackets around your cylinder. So unless the water jacket cracked you're not leaking coolant from the turbo.

I doubt that's coolant on your manifold, looks more like ash from running lean/hot.
Same for cylinder 2 plug; looks hot/lean. If you had coolant leaking into it the plug should be sparkling clean. Yours looks too dirty for a coolant leak [even aside from the oil]. And the electrode looks more worn than the others from the pic.

Any bubbles in the coolant?
Pull the radiator cap, let the car run and see if you get big bubbles bursting out of the radiator.

Have you done a compression check?
Have you pressurized the coolant system?
Recheck the coolant for exhaust gas?

Good stuff to do before you pull the head.
Coolant can leak from anywhere and won't always be visible/obvious unless you catch it leaking [can leak intermittently].

04-29-2015, 01:25 AM
Thanks for taking a look Jeremy.

I'll go back and do some more checking. I looked up a drawing of the turbo the other day and say that there were no seals. I had written that one off.

I haven't checked the compression so I'll do that. I also haven't rechecked the exhaust gas in the coolant or repressure tested the system. I'll do that this week and see what things look like.

The residue on the manifold is what threw me. If that cylinder is running lean/hot, what could cause the problem for just than cylinder?

Thanks again. As always you're a wealth of information and a major asset to the community!

04-30-2015, 02:15 AM
Hey Jeremy,


05-03-2015, 03:29 AM
Finally got a little time to follow up on some of Jeremy's suggestions.

Evidently I've had or possibly still have a hell of a lot of air in cooling system. When I first pulled the cap and let it run for a while, I was getting a lot of big bubbles coming through. I probably let it run an hour to an hour and half and was still getting a lot of bubbles coming out. Even jacked the front end up bit to try and help. I ran it again this morning for probably another hour and half and the bubbles aren't nearly as prevalent as they were. I'm still getting some small ones coming through but it's better I hadn't really paid attention before but the follow through radiator is fast and high volume. At least I know the water pump is working. I'm going to let it run some more tomorrow and see if I can get any remaining air out of the system.

I went to Autozone last night and borrowed the exhaust gas tester. I've had a bit of time getting the coolant level done in the radiator so that I'm not getting coolant up in the tester but I got this lined out for while this evening. I was able to let the tester work for about 5 minutes after things were good and hot before I a got surge of coolant that contaminated the tester fluid. Prior to that, no color change in the test fluid so apparently no exhaust gases in the coolant. I'm going to do it again tomorrow and see if I can the coolant level to stay down and not contaminate the test. I'd like to have the tester in place and working for another 10 minutes or so. The instructions say you only need 2 minutes but I'd like to have it on there longer just to make sure.

I'll report back tomorrow.

05-03-2015, 02:46 PM
Ran the exhaust gas test again this morning. Had the tester in place for 10 minutes and it doesn't look to me that there is any color change. Looks blue to me. Here's a picture.

http://i304.photobucket.com/albums/nn195/gowron100/Mobile%20Uploads/20150503_100945_zpsyd2661wc.jpg (http://s304.photobucket.com/user/gowron100/media/Mobile%20Uploads/20150503_100945_zpsyd2661wc.jpg.html)

It looks like I've still got a good bit of air in the system. I'm still getting bubbling.

05-04-2015, 01:17 AM
Hey Jeremy,


hahahaha Thanks
If only I could kick like that....

05-04-2015, 09:16 AM

05-04-2015, 05:27 PM
Those tests dont always work on these things.

You should get a leak down tester and pressurize the system that way. Have the rad cap popped, and listen for bubbling in the system. Look in each cylinder. Thats how I do it. Im not horribly concerned with lead down percentages for this test, Im just trying to force air into the system.