| Tony Radford |
11-10-2010 08:10 AM |
Oil consumption through heads
I read somewhere in the past that TFS heads were notorious for valve guide wear. Do worn guides and seals typically have a big impact on oil consumption? Leakdown test shows ring integrity is great. I have a separator in the PCV line, so that's covered. I'm running synthetic, but the degree of consumption hasn't really changed since I switched from 50W Valvaline.
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| blykins |
11-10-2010 08:23 AM |
Are they Twisted Wedge heads?
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| Tony Radford |
11-10-2010 08:38 AM |
Yes. They're the Twisted Wedge heads.
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| blykins |
11-10-2010 08:47 AM |
How do the plugs look?
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| Tony Radford |
11-10-2010 12:01 PM |
Brent,
The last time I changed them, they really didn't look bad. I seem to recall that one or two were a bit gunky. It doesn't smoke noticibly, but it didn't smoke much when my rings were shot on an earlier engine that drank a quart every fifty miles. The wall in my garage stays covered with soot from where I start her up. She doesn't leak. I don't know where else it could be going.
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| blykins |
11-10-2010 12:08 PM |
Excessive valve guide wear or bad valve seals can cause an engine to use a little oil...
How much is it using?
A leaky valve seal will show up as a puff of smoke when you first start it up in the morning, or when you lift off the throttle to shift.
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| Tony Radford |
11-10-2010 12:23 PM |
Maybe a quart every 150-200 miles.
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| Barry_R |
11-11-2010 05:36 PM |
How old is the engine? Has it always burned oil or did it start slowly and get worse? Or did it happen all of a sudden? A leakdown or compression test will not address or identify worn or broken/failed second or oil rings. Bad guides or seals will defintely cause oil use - you are using a LOT if it goes through a quart that fast....
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