Crusty pistons
Thread Starter
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Outstanding HDF Member
Joined: May 2005
Posts: 2,525
Likes: 4
From: Montreal, Canada
Crusty pistons
Well the top of my engine is off and is going to be shipped
tomorrow to Doug over at Head-Quarters. One thingI
noticed, is that the top of my stock pistons is covered with a
black, oily residue about 1/32 to 1/16 of an inch thick. My tech
told me that it's caused by faulty valve seals. Can this be so.
P.S. I'm so excited....[sm=bounceybounce.gif][sm=happy046.gif][sm=yeahsmile.gif]
tomorrow to Doug over at Head-Quarters. One thingI
noticed, is that the top of my stock pistons is covered with a
black, oily residue about 1/32 to 1/16 of an inch thick. My tech
told me that it's caused by faulty valve seals. Can this be so.
P.S. I'm so excited....[sm=bounceybounce.gif][sm=happy046.gif][sm=yeahsmile.gif]
Cruiser
Joined: Sep 2007
Posts: 157
Likes: 0
From: South Carolina
RE: Crusty pistons
I had the same thing. I'm not so sure it's not just a normal thing to have. Doug said I might have been running rich. Doesn't matter though, you are getting new pistons, heads, and cylinders anyway.
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
Likes: 3
From: TX
RE: Crusty pistons
It's great to see progress, eh Mike? 
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!
Road Warrior
Joined: Dec 2006
Posts: 1,530
Likes: 0
From: Diamond Bar, California
RE: Crusty pistons
ORIGINAL: PhilM
It's great to see progress, eh Mike?
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!
It's great to see progress, eh Mike?
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!
Ultimate HDF Member
Joined: Feb 2007
Posts: 5,578
Likes: 4
From: Northern California
RE: Crusty pistons
ORIGINAL: Crazy Canuck
Well the top of my engine is off and is going to be shipped
tomorrow to Doug over at Head-Quarters. One thingI
noticed, is that the top of my stock pistons is covered with a
black, oily residue about 1/32 to 1/16 of an inch thick. My tech
told me that it's caused by faulty valve seals. Can this be so.
P.S. I'm so excited....[sm=bounceybounce.gif][sm=happy046.gif][sm=yeahsmile.gif]
Well the top of my engine is off and is going to be shipped
tomorrow to Doug over at Head-Quarters. One thingI
noticed, is that the top of my stock pistons is covered with a
black, oily residue about 1/32 to 1/16 of an inch thick. My tech
told me that it's caused by faulty valve seals. Can this be so.
P.S. I'm so excited....[sm=bounceybounce.gif][sm=happy046.gif][sm=yeahsmile.gif]
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
Likes: 3
From: TX
RE: Crusty pistons
ORIGINAL: mentor70
Meztler and Dunlop are going to love you guys!!
Meztler and Dunlop are going to love you guys!!
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Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
RE: Crusty pistons
CC - good luck with the build !
Yeah, and I used to think if I got anything less than 10k miles out of a rear tire that something was wrong.....
Yeah, and I used to think if I got anything less than 10k miles out of a rear tire that something was wrong.....
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Thread Starter
|
Outstanding HDF Member
Joined: May 2005
Posts: 2,525
Likes: 4
From: Montreal, Canada
RE: Crusty pistons
It's a 2005. My plugs always read ok. I'm thinking my tech
is probably right. The build up is kind of oily. I can't wait to
get my heads back to see Dougs work first hand.
is probably right. The build up is kind of oily. I can't wait to
get my heads back to see Dougs work first hand.
ORIGINAL: PhilM
It's great to see progress, eh Mike?
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!
It's great to see progress, eh Mike?
What year is you Duece? The 05s & some 06's had crummy vavle seals and many were prone to leaking. If the build up was wet, it could be from the seals or it could be from running extra rich too. If it's dry, it's just normal carbon build up. They ALL do that.
You won't have to worry about leaky valve seals when you get them back.
I have mine apart now too!