Blown Plug On V10
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From: Matthews,GA.
Blown Plug On V10
Had ask about a rebuild kit couple wks ago but wonder if maybe I could save some money. We fixed the plug by using an insert but ever since we replaced it it seems to have a vaccum leak that we can't find and it smokes on startup which it did not do before any help would be great. The info on rhino engines last time was also helpful.
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From: Matthews,GA.
yea thats what i'm afraid of I was doing some work on it earlier and took the oil cap off while the engine was running and the truck immediately shut off that freaked me out. anyone know why could it be an cracked piston?
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From: Burnsville, MN
Well that's so insane I just had to check it out. No, removing the oil filler cap won't kill your engine. Its fundamentally unrelated to anything. However, just in case these new computer controlled engines did things differently, I just did it on my 2005 V10, and it made absolutely no difference. I even laid my hand over the opening to see if I could detect any vacuum, which I didn't.
Don't know why you immediately are wondering about a cracked piston, as opposed to a leaky head gasket, etc., but yes, if in the process of removing the old debris when you put in the insert, you dropped debris into the cylinder, then you could certainly have screwed up the piston and cylinder walls. Seems to me though before reaching this conclusion maybe you could run a compression test on the cylinders, which wouldn't cost you much more than just your time.
Obviously I'm assuming you have an older V10 which is out of warranty...
Don't know why you immediately are wondering about a cracked piston, as opposed to a leaky head gasket, etc., but yes, if in the process of removing the old debris when you put in the insert, you dropped debris into the cylinder, then you could certainly have screwed up the piston and cylinder walls. Seems to me though before reaching this conclusion maybe you could run a compression test on the cylinders, which wouldn't cost you much more than just your time.
Obviously I'm assuming you have an older V10 which is out of warranty...
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From: Matthews,GA.
yea its in a 99 F-350 and the compression was 5% less in that cylinder before the plug issue. I was just have learned to assume the worst. But you are right i do need to check it again. The oil cap thing just threw me all off. thanks for the input
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From: Burnsville, MN
Okay, I know I'm going to get flamed for this, so I'm going to offer some information first that might apply here.
My son has a 19-yr-old Buick LeSabre that he's committed to driving until it quits, but it just "keeps on keeping on". Probably has a zero re-sale value, but it just won't quit. I noticed on one visit that it was well over a quart low on coolant, and a quart overfilled on the oil stick. Obviously not wanting to put any money into it, I went the el-cheapo Stop Leak route just to get him where he was going. Well that was about twenty thousand miles and 3 years ago.
My point is, if you're not married to the truck, you could throw one of those chemical additives in for stopping head leaks, etc., and if it works, (1) you'll know you don't have a piston problem, and (2) you'll buy yourself some time to decide what you want to do.
Now of course if it doesn't leak, you'll have at least figured out for about ten bucks that you have a problem that will cost you some serious money.
Okay, flame away....
My son has a 19-yr-old Buick LeSabre that he's committed to driving until it quits, but it just "keeps on keeping on". Probably has a zero re-sale value, but it just won't quit. I noticed on one visit that it was well over a quart low on coolant, and a quart overfilled on the oil stick. Obviously not wanting to put any money into it, I went the el-cheapo Stop Leak route just to get him where he was going. Well that was about twenty thousand miles and 3 years ago.
My point is, if you're not married to the truck, you could throw one of those chemical additives in for stopping head leaks, etc., and if it works, (1) you'll know you don't have a piston problem, and (2) you'll buy yourself some time to decide what you want to do.
Now of course if it doesn't leak, you'll have at least figured out for about ten bucks that you have a problem that will cost you some serious money.
Okay, flame away....
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From: Burnsville, MN
Good point. Never hasn't been much discussion of why he suspected a vacuum leak. Also, V10's are known for putting out a puff of blue (I think) smoke whenever the last use was just to move it in the driveway.
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From: Matthews,GA.
I suspected a vacuum leak because of the rough idle and the engine changes idle speeds while sitting at an idle. The engine will smoke white on startup and is a pretty good quantity of smoke then will not smoke anymore until it is off for a several hours. Coolant levels are normal along with no extra in the oil pan. Another question when they normally blow a plug will it commpletly blow it out of the cylinder like mine did. It came completely out and broke the eyelet off the coil where you bolt it down. It is a 5spd and is rough through 1st and 2nd and then will smooth out at road speeds.