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Post by MattySoho on Nov 20, 2006 13:28:09 GMT -5
This isn't about my Chevy truck, but I figured since I am the proud owner of a '87 Chevy, then you guys would help me with my '67 Firebird as well...(?)
Anyways, I was recently driving from Star Valley, Wyoming, to Laramie, Wy, when I noticed that the engine temp was steadily climbing. No big deal, I thought, I'll just be easier on the gas. It seemed to help, keeping the engine temp around 180 if I was conservative with the throttle. Upon traveling through Rock Springs, Wy (about 3 1/2 hours from Star Valley AND Laramie, in the middle) a strange knocking noise developed in the engine and steadily became louder, and the temperature skyrocketed for about 3 minutes and was up to about 235 before I could find a place shut her down. The radiator was pouring out steam as well, and I had it towed back to Star Valley where it now sits.
My first thought was that I definitely threw a rod, but would that make it heat up like that really fast? Also, I've been reading a lot on blown head gaskets that heat up slowly when they're about to go, and the excessive pressure is making me think that maybe exhaust is leaking into the cooling system because of a blown head gasket. I've heard that a blown head gasket between cylinders can make a knocking noise similar to a rod, is this true? Also, a third possibility, I have been told, is perhaps a spun bearing. How do I check for a spun bearing? Do I just take off the oil pan and look around?
Any help is greatly appreciated! -Matt
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Post by MattySoho on Nov 24, 2006 16:27:12 GMT -5
Hello, just an update for anyone who might want to know:
Upon tearing apart the whole engine, I found that after I removed the valley pan, there was a broken skirt of a piston sitting in the valley. Not good. Once the heads were off, I discovered that 2 of the 8 pistons had considerable wear from smacking into the head, my guess is that the bearings had so much play in them that they were allowing the pistons to extend farther up in the chamber, thus hitting the head. Probably a inferior rebuild from the previous owner, due to some bad machining on the crank journals. Looks like it's time for a new motor!
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Post by Pontiac1976 on Dec 6, 2006 6:24:39 GMT -5
Wow tat sucks sorry to here that good luck with the motor.
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