Another Engine Failure Thread....
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Postmaster
Joined: Dec 2005
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I made a mistake in my posts, being a bit pissed was making me not think too well, it was number 7 and now that I looked at it more, it was also number 4 or 6(can't remember). Got the head off the one side, I know what the other side is going to look like...
Oh yeah, the piston has a crack on the top(hard to see in the picture) that is at 12 oclock and goes all the way from the bowl to the end of the piston. There seems to be no damage to the cylinder wall, Ill have a picture later. Might not be as bad of failure as I thought.
Oh yeah, the piston has a crack on the top(hard to see in the picture) that is at 12 oclock and goes all the way from the bowl to the end of the piston. There seems to be no damage to the cylinder wall, Ill have a picture later. Might not be as bad of failure as I thought.
Posting Guru
Joined: Feb 2007
Posts: 1,146
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From: Bradenton FL
Sorry John, doesnt look as bad as initially thought though
From the start i thought it was pretty loud to be a rod. Good luck with the repair im sure it will run twice as good and strong when you get it put back together
From the start i thought it was pretty loud to be a rod. Good luck with the repair im sure it will run twice as good and strong when you get it put back together
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Shoots the skirt clearance explanation all to hell, doesn't it?
I still "worry" about my slapping, however, and hope it doesn't turn out like this someday.
If you get out of this with just broken aluminum, you've got to be the luckiest man in North America today!
Are you going at least .010-over, or putting back stockers?
I can offer absolutely no explanation for THIS kind of break-up. Doesn't look like they got hot, even.
Since you've got the pan off, how many pistons can you see broken up in there?
Pop
I still "worry" about my slapping, however, and hope it doesn't turn out like this someday.
If you get out of this with just broken aluminum, you've got to be the luckiest man in North America today!
Are you going at least .010-over, or putting back stockers?
I can offer absolutely no explanation for THIS kind of break-up. Doesn't look like they got hot, even.
Since you've got the pan off, how many pistons can you see broken up in there?
Pop
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
Yes, stock pistons, and even Mahle's are cast. You want to use a cast piston for anything except hardcore racing. Arias and a few other companies make forged pistons, however they are very expensive, wear quick, and shouldnt be daily driven as i think the rings are different, designed for racing.
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
Correct. They're not a keystone type of ring. No good for DD work.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
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Lead Driver
Joined: Jan 2006
Posts: 6,267
Likes: 5
I thought titanium burns easily?
IMHO the pistons should be white metal, pressed into a stainless steel sleeve.
White metal for superb heat transfer capability, and SS for longer wear time...
The white metal expands faster than SS, so once she'd warm up, any chances of cracking or losing the wrist pin are gone. The SS sleeve would also attach somehow to the wrist pins, adding strength.
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
Alot of OTR truck engines (one's ive had experience with are the 3406's), that use a two piece piston. The skirt is lightweight aluminum since it doesnt need to be heavy and strong, and the piston crown and the center that connects to the wristpin is steel, to withstand the heat and combustion forces. The rings are in the steel section, its a great idea.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
You are thinking of magnesium.
Doesn't need to be strong? Isn't that what this thread started out as? Broken, weak, skirts?
Just razzin' ya', Kris.
Pop
Just razzin' ya', Kris.
Pop