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73-87chevytrucks.com
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73-87 Chevy _ GMC Trucks
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350
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Topic: 350 (Read 5960 times)
str8bloc
Registered Users
Posts: 122
MISTRESS
350
«
on:
November 27, 2011, 07:45:08 am »
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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FaTbOy
bake74
Senior Member
Posts: 5871
Re: 350
«
Reply #1 on:
November 27, 2011, 09:52:32 am »
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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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
74 k10, 77k10 Tom
str8bloc
Registered Users
Posts: 122
MISTRESS
Re: 350
«
Reply #2 on:
November 27, 2011, 10:21:22 am »
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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FaTbOy
Engineer
Senior Member
Posts: 1402
Re: 350
«
Reply #3 on:
November 27, 2011, 12:11:24 pm »
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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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454
Dad of an Eagle Scout, and a Life Scout
Blazin
Blazin new trails!
Senior Member
Posts: 6130
Re: 350
«
Reply #4 on:
November 27, 2011, 12:56:35 pm »
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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Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs
bake74
Senior Member
Posts: 5871
Re: 350
«
Reply #5 on:
November 27, 2011, 02:14:14 pm »
See, I knew there be some great answer's.
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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
74 k10, 77k10 Tom
str8bloc
Registered Users
Posts: 122
MISTRESS
Re: 350
«
Reply #6 on:
November 27, 2011, 03:15:57 pm »
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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FaTbOy
jdl71
Registered Users
Posts: 145
Re: 350
«
Reply #7 on:
November 27, 2011, 04:17:14 pm »
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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str8bloc
Registered Users
Posts: 122
MISTRESS
Re: 350
«
Reply #8 on:
November 29, 2011, 05:26:11 am »
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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FaTbOy
jdl71
Registered Users
Posts: 145
Re: 350
«
Reply #9 on:
November 29, 2011, 07:17:28 am »
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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1980c10
Senior Member
Posts: 1205
Re: 350
«
Reply #10 on:
November 29, 2011, 06:24:08 pm »
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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str8bloc
Registered Users
Posts: 122
MISTRESS
Re: 350
«
Reply #11 on:
November 29, 2011, 07:43:36 pm »
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
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FaTbOy
Engineer
Senior Member
Posts: 1402
Re: 350
«
Reply #12 on:
November 29, 2011, 08:56:01 pm »
Do it right this time to avoid headaches later on.
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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454
Dad of an Eagle Scout, and a Life Scout
str8bloc
Registered Users
Posts: 122
MISTRESS
Re: 350
«
Reply #13 on:
November 30, 2011, 05:33:03 am »
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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FaTbOy
1980c10
Senior Member
Posts: 1205
Re: 350
«
Reply #14 on:
November 30, 2011, 08:13:36 am »
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).
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