Smokin'...Heads Responsible?

[750H.P.V6]

Hi Terry,

Sorry to hear you're having problems. I have to agree with some of what's been stated above. If you're using 3 quarts of oil in 1500 miles and the oil turns black almost overnight you've got problems. This is an indication of a ring seal problem.

Another issue with all the Champion GN 1 heads is the crappy exhaust guides they come with. The problem with the first version heads was that the guides couldn't handle the heat of the exhaust gasses and fell apart. Champion went to steel guides with K- line liners shortly there after. These guides suck.

Basically a K-line type insert isn't designed for long term use and is not correct for the application. If you have a set of Champion GN1's with over 1500 miles on them the exhaust guides will already be well worn and the car will smoke at an idle and under decelleration. We change out all the guides prior to installing the heads. As usual Tom at Champion will deny there is a problem.

Back to the original post, I think you have a ring problem. I'd say you should do a leak down and see what you find.

Good luck.
Neal

 

[ThikStik]

Originally posted by Terbro
Well, with 6K original miles, you kind of think it'd have to of...sat up.

TK

Well alrighty then....Just trying to help.

 

[Terbro]

Rick - I'm not into the faces cool: ), in fact that one there is the first, and probably the last one I'll ever post. But one would have worked well after my answer to your question. It wasn't trying to be snotty...just sarcastic.

I'm pretty confident that the motor (bottom end) was in pristine condition when I bought it. The ultra high-temp cam break-in may have fried the rings? From a totally cold motor, the headers were 100% red within 60 seconds during the initial break-in. Exhaust temps were so hot the entire exhaust system, all the way to the tips was smoking from the outside due to the heat. Coolant temp rose to 205º by 10 minutes with my HE 3 row radiator and dual spal fans in 50º ambient temp. I shut it down at 10 minutes. After discovering the disconnected T+ wire to the coil, the coolant never rose above 165º during the resumed cam break-in. Of course I know one shouldn't do this, but I had no choice but to abort it initially.

Though it's been theorized that most of the heat stayed in the heads, produced by an ultra lean condition, who knows what it did to the motor. It may have fried the valve guides?

I don't resolving this problem as long as it doesn't cost me any money or inconvenience in any way.

Terry

 

[ThikStik]

Yea. Im just trying to get info-it may seem mundane. Ironically, now you come up with a biggee. I saw the lean idle info but did not know about the overheat info on cam break in. That info may change things. Maybe some Champion gurus will chime in. i know that alum doesnt like heat. The big engine guy around here says all alum heads have a degree of valvelrecession at 15k miles or more. And that is just from normal use. Could the orings have just hardened and gone away? Localized warpage on some intake guides like ya said? It shouldnt have hurt motor at all. And now I bet it's heads.
Good Luck