73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: str8bloc on November 27, 2011, 07:45:08 am
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i have a 350 in my garage it lost oil pressure. do i need to replace the main bearings i kinda need this motor asap. im just hopin the crank looks good the walls still look great. i will pull the pan tomm and see how it looks. im figuring i need a new oil pump. what else should i do just in case.
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WOW, now that is a loaded question. First off I am not a engine builder, but I know a lot of people who are and a lot of people on here know what they are talking about.
I do not know anybody who would give you a complete answer without seeing the engine torn apart. (if they did I would not trust them too much) Common since says the easiest would be new oil pump, then the question, did you run it, or someone told you it lost oil pressure before it sat in your garage, did it smoke or start making noise ? Was it running rough when it came out, loss of power ?
I am sure you will get several answer's, there are a lot of members here who know their engines, I just gave you some things to think about so you can prepare.
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sorry had a little too much coffee this morning. Yes i did run it when it loss oil pressure. i drove it for a mile to get home when it did. it sounded like a typewriter when i stopped it. when i restarted it it had a knock so i shut it off and pulled it.
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The typewriter is the lifters.
The knock is a bearing. I have never seen a situation like yours that didn't need a crank afterwards. Only way to know for sure is to pull it down, and see.
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If it knocked at the very least it would need bearings. More than likely it will need the crank turned or replaced.
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See, I knew there be some great answer's. ;D
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ok well its gonna a long nite here at work so tomm itll have to see i hope just new bearings.
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Unless you're really, really short on time/money I would have the crank ground. It's relatively inexpensive especially when compared to doing all this again.
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well # 1 and 2 rod bearings went out crank will need to be reground. my new question is the head gasket blew should i just rebuild the whole thing or just fix what i need?
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If I had it that far apart, I'd just rebuild it. You can get a master kit for under $250. Then you're just looking at machine work if needed and whatever the heads need.
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Rebuild it and get the heads checked for sure. Its also a good time to consider upgrades if they are in the budget.
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well the wife said rebuild it (you know how they are the boss lol).so im gettin a bigger cam and just make it good and reliable. i have 2 blocks this one is gonna hopfully be built by feb. the other is gonna b my stroker.these are my bearings
(http://i838.photobucket.com/albums/zz301/martinezfatboy/bearings.jpg)
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Do it right this time to avoid headaches later on.
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i do im gonna have the machine shop build my shortblock full rebuild. heads im lookin at some vortecs or rhs
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Consider some flat top pistons as well to up the compression ratio for some more hp and mpg. This is my combo and it dynoed at 393 hp, 432 tq and I get 16-21 mpg depending on my driving(w/vortech heads).