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so i have a eaten up cylinder on a newer engine, 302 so i need to know what to do about it. do i try and get the cylinders bored over and get bigger rings if so what size rings do i get
Last edited by KingProvince; Aug 5, 2017 at 09:58 AM.
Reason: presentation
A machine shop will handle boring as needed. You'll need new pistons with an over bore, just rings won't do it. If it doesn't need to be bored, you can replace rings and rehone.
so i just broke it down its all the way to the block and pistons. took the heads off oil pan all that good stuff so i spun it and that is the only cylinder that was scarred so.....
its for my ford f250 4x4 302 aod bw1356.
the new engine came outta 88 mercury or something like that but it only has 49k miles so its a good motor so why is the one cylinder scarred what do i do to fix this.
what would make it run lean other than some stuff on the other car it came out of and how can u tell
The pictures don't show much of a scar, certainly not a wrist pin gone bad. What kind of scar do you have? A deep groove in the side of the cylinder? That's what comes to mind when we are talking wrist pin failure, at least for me.
There's some confusion here. You title your thread about a wristpin and show pictures of the cylinder and top of the piston. Then you talk about it's all tore down but you still didn't get to a wrist pin.
What does this have to do with a wrist pin? When are you going to get to the wrist pin?
Are we talking about the weird looking scuff marks in the cylinder?
And why on earth would you put a 302 back in a blocky, heavy truck?
You'll have to pull the damaged piston and see how much damage has been done... if you're doing a budget job it looks like you will at least need one new piston and ring set along with honing that cylinder.
I'd suggest finding a reputable machine shop and take that engine to them and get their opinion... then you'll know what exactly you need to do.
Fixing what's broken without doing an entire rebuild is OK.... but you'll be wasting money if it has other issues besides that one cylinder damage.
There's some confusion here. You title your thread about a wristpin and show pictures of the cylinder and top of the piston. Then you talk about it's all tore down but you still didn't get to a wrist pin.
What does this have to do with a wrist pin? When are you going to get to the wrist pin?
Are we talking about the weird looking scuff marks in the cylinder?
And why on earth would you put a 302 back in a blocky, heavy truck?
302 is what was in it when i got it, its all i have as a choice right now.
i was told by many people it was probably a bad wrist pin the scaring is like a topography map it kinda steps up, its not a vertical scar along the wall its 4 or 5 horizontal to the cylinder scars like the edge of the piston kinda scooped into the wall
i dont want to have to break it all the way down to that stuff if i donmt have to so i have less to put together so if u guys dont think its a wrist pin then i wont go all the way to it, hell this is my first engine for me so if u guys think that is normal scaring for the engine ( even tho its only in the one cylinder) id probly just put it back together and put it in
And why on earth would you put a 302 back in a blocky, heavy truck?
well how much and what would it take to get the 302 to a stroker is this the right block to get bored and stroked to a 373 or 383 (cant remember which one is the ford one)
That piston needs to come out to see what it looks like, and if not too bad, do a slight hone on the cylinder.
It still looks like the piston rattling around from running lean/spark knocking. Could be caused from timing too high or maybe an intake gasket or vacuum hose bad at that cylinder runner.
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