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#1 |
Registered User
Join Date: Apr 2010
Location: Kelowna, Canada
Posts: 116
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At the end of my rope...
Hey all,
Well some news hit me that shook my foundation on whether to keep the truck or not. Apparently the thrust washer on my Crank is gone causing the crank to move and eat the rear main seal (The cause of my leak i believe) And my mechanic (which is a good friend of mine, i help do most of the work) Anyways he says that ill need to pull the motor and get it machined.... Do you guys think its worth it? I absolutely love my truck but im looking at a hefty bill in the future so i dunno what to do ![]() ![]() Its definately depressing Matt
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1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205 |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: At the end of my rope...
get a quote on fixing it, then get a quote on a new crate motor + labor. You just might be suprized
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#3 |
Registered User
Join Date: Mar 2010
Location: Minooka IL
Posts: 191
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Re: At the end of my rope...
what about getting a new short block and switching everything over. If you've already got a good top end this is what I would look into doing.
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Ben _____________________________________ 1971 Chevy shortbed 350/4-speed sold 2005 Chevy Duramax EC/4x4 Local 597 Pipefitters certified TIG MIG and stick welder |
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#4 |
Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: At the end of my rope...
That sounds like the cheapest route to me. What condition is the motor in other than the crank walk?
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68 3/4 ton ![]() ![]() 41 3/4 ton ![]() 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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#5 |
Registered User
Join Date: Apr 2010
Location: Kelowna, Canada
Posts: 116
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Re: At the end of my rope...
The motor is in good condition...havent really opened it all up but she runs like a deer!
And a short block is simply a block or is it with some components? Im not quite sure which one is which (long block and short block) Matt
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1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205 |
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#6 |
Registered User
Join Date: May 2010
Location: ft smith arkansas
Posts: 131
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Re: At the end of my rope...
A short block is block with internals (pistons crank rods cam etc) and the oil pan. add heads and its a long block. Is it a manual transmission? It must be worn awful bad to eat the seal.
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1972 super cheyenne 1970 Suburb |
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#7 |
Registered User
Join Date: Apr 2010
Location: Kelowna, Canada
Posts: 116
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Re: At the end of my rope...
Yes its a 4 speed SM465 with a NP205 behind it
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1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205 |
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#8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: At the end of my rope...
i would opt for the long block or a GM crate if I was in your shoes. No way would I slap old questionable heads on a new short block.
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#9 |
Registered User
Join Date: Apr 2010
Location: Kelowna, Canada
Posts: 116
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Re: At the end of my rope...
ok so now the question would be...how easy are aluminum heads to strip when putting new plugs in? Ive heard some bad things about them so im just wondering if there a good idea?
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1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205 |
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#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: At the end of my rope...
if it's a stock motor, then there's not much reason IMO. They are a bit lighter, and cool a little better, but no need in a stock engine. If it was, then they would have come that way.
Iron is mega cheaper, doesn't warp as easily, and in a stock engine, works just as well. However, to answer the actual question, as long as you coat the plugs with anti-seize, it'll never happen. |
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#11 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: At the end of my rope...
The SBC crank thrust ring surface being eaten away is a common prob on high mileage engines. The 350 in my 1972 GMC was the same way when I got it. But I was planning on a full on rebuild anyways.
In your case, a good shortblock will be EZPZ to do. Pulling the engine yourself isn't really all that hard. Just labor intensive. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#12 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: At the end of my rope...
Quote:
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 06-23-2010 at 02:58 PM. |
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#13 | |
Registered User
Join Date: Apr 2010
Location: Mobile, AL
Posts: 365
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Re: At the end of my rope...
Quote:
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#14 |
Registered User
Join Date: Jan 2007
Location: Toronto Canada
Posts: 265
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Re: At the end of my rope...
I agree just swap it. You may get a complete 350 ready to go.. Easy to install.
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#15 |
What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: At the end of my rope...
What is your budget for this situation?
That will determine a lot, as to which direction to go next. Fix what you have. Used engine vs new engine. stock vs performance upgrades. Figure out what your budget is, then decide the best route to take after that. Let us know what that budget is, and we can all give you some help on the best direction to take.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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