|
By 55courier - 16 Years Ago
|
|
Well I pulled the engine out of the Courier. I was going to fix the rear main leak, and have the heads redone. It was a very good running engine just leaked a lot of oil. So I get the heads pulled and find the drivers side rear cylinder has a crack about half way around the cylinder. I know we could have it sleeved but now is not the best time for me to do a complete rebuild. Iam thinking about just replacing the rear main and running it till she goes, but that could ruin a lot of other parts that are still usable. I wish now I had not promised the wife she would be driving her wagon when spring gets here. Anyone one want to volenteer to tell her for me?
|
|
By MikeLongIsland - 16 Years Ago
|
|
If your gonna run it as is, clean the crack up a bit and jam some JB Weld in it, fixed a Vega Block with it when I was a kid, it held.
|
|
By jepito - 16 Years Ago
|
|
A buddy of mine was changing head gaskets on a mini van. got a little carried away cleaning the surface of the block with scotbrite sander and gouged the block. He put it back together and it leaked water. took it back apart, a little JB Weld and carefully filled back smooth. Reassemble and no problems. Not saying I would do it, but if you really need it running.....
|
|
By Unibodyguy - 16 Years Ago
|
|
On cracks, if you can, take a drill with the smallest bit you have and drill a small hole on the end of each crack so it won't go any further. Then JB weld it and it should hold. I always heat up the area around the crack with a torch first before appling the JB so it sets into crack better. Thats how I was shown to fix it and always worked for me.
|
|
By 55courier - 16 Years Ago
|
|
Thanks for the replies, I agree with the thought of drilling the ends of a crack to stop it. But this crack is in the cylinder wall about half way down. even if we could JB weld it that would play heck with the rings.
|
|
By MoonShadow - 16 Years Ago
|
|
Use a right angle drill adapter to get in the hole. After heat/JB weld you could run a cylinder hone through it. Should take car of the ring problem unless the crack has a lip on it. Chuck in NH
|
|
By PF Arcand - 16 Years Ago
|
|
You've got an oil leak problem & a cracked cylinder and the engine is already out. So, If the engine is alright other wise, maybe you should spring for a sleeve job. Then clean it up well & re assemble it. Just a thought...
|
|
By crenwelge - 16 Years Ago
|
|
If its a 272, those blocks can usually be bought at scrap iron price. You might consider starting with a fresh block.
|
|
By Ol'ford nut - 16 Years Ago
|
|
Do yourself a favor and don't go any further. Any time or money spent is wasted. You need to go with another block or sleeve it. Fixing it is the only answer.
|
|
By mctim64 - 16 Years Ago
|
|
crenwelge (10/19/2009)
If its a 272, those blocks can usually be bought at scrap iron price. You might consider starting with a fresh block.This is true! and you'll be a lot happier in the long run. You have the engine out already, don't 'rig it, do it right. 
|
|
By 55courier - 16 Years Ago
|
|
You guys are right, The search has started for a new motor. Thanks
|
|
By John Mummert - 16 Years Ago
|
|
Are you sure it is really cracked? If you're not getting water in the oil or steam in the exhaust it might be an actual crack. Does it run in a straight line? Cracks are jagged. If it is perfectly vertical in could be a scatch. If horizontal It is likely a stain from fuel. If it is really cracked best to start over.
|
|
By 55courier - 16 Years Ago
|
|
It is a crack that runs close to horizontal. It has a ridge on one side where it has seperated. I had no indication there was a problem with the motor. I have not pulled the pistons yet, but you can see where the rings or piston sides have been wearing on the lip of the crack. My cheap camera will not take good enough close up pics or I would post one for you.
|
|
By Ted - 16 Years Ago
|
|
Like John, I question if this is a crack if there’s no evidence of water getting into the cylinder. If you can get an adequate camera for a picture, be sure to set the camera to the ‘macro’ mode so that any details will be clear. The description thus far just sounds like a badly worn cylinder at the top of the bore and potentially a broken top ring or badly worn top groove in the piston as well. Definitely interested in what you find when you remove the piston.
|
|
By MikeLongIsland - 16 Years Ago
|
|
Maybe it's a crack and the engine had been sleeved at one time?
|
|
By MoonShadow - 16 Years Ago
|
|
How far down in the cylinder is the crack? Top, Middle, Botton etc.? If you do replace the block go for a 292 or bore/sleeve yours to 292+. The parts all fit but the 272 rings and pistons are getting hard to find. Chuck in NH Where are you located?
|