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Author Topic: Motor ready to pop BOOOOO!!!!  (Read 5717 times)

Offline Uno99

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Motor ready to pop BOOOOO!!!!
« on: August 28, 2009, 12:42:41 pm »
Well the time is near.  I was driving my truck and out of nowhere, I started to here a light knock.  I pulled into a gas station and popped the hood and gave a listen.  When idling and at a 2000-3000rpm rev in park there is no knock.  However when it's under a load and I get up around 2300 she start to knock.  I got it home and yanedk the valve covers off to see if maybe a rocker arm was loose. "WISHFUL THINKING" and everything was just fine. However, I drained the oil and there was a good amount of metal shaving in the oil.  WAH WAH WAAAAH. :o  Looks like i have some work ahead of me.  At least i got a good amount of driving out of it this summer. Man I hate SBO engines.  Maybe now it the time to do it right and drop in a BBC baby!!!
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1981 GMC High Sierra SBO 350 LT Headers 2.5" Tru Duals, H-pipe, Flowmaster SUPER 44 Mufflers 2000 TCI Stall PICS http://www.cardomain.com/ride/2410355

Offline eventhorizon66

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Re: Motor ready to pop BOOOOO!!!!
« Reply #1 on: August 28, 2009, 06:26:43 pm »
Sorry to hear that.
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'85 C10 SWB 350 700R4 TKO600

Offline DnStClr

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Re: Motor ready to pop BOOOOO!!!!
« Reply #2 on: August 29, 2009, 12:25:45 am »
Yeah, it seems like it's when you're not lookin for trouble is the best time for it to find you!
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Don
87 Chevy Silverado

Offline VileZambonie

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Re: Motor ready to pop BOOOOO!!!!
« Reply #3 on: August 29, 2009, 08:58:20 am »
sbo?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline joesgarage71

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Re: Motor ready to pop BOOOOO!!!!
« Reply #4 on: August 29, 2009, 11:33:07 am »
oops been hammering on it huh?
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78' K-20 355/SM465/twin stick 205 6" on 36's
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92' GMC C-1500 454/4L80E/14 bolt

Offline eventhorizon66

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Re: Motor ready to pop BOOOOO!!!!
« Reply #5 on: August 29, 2009, 11:34:21 am »
Quote from: VileZambonie on August 29, 2009, 08:58:20 am
sbo?

He's got an Olds 350 under the hood.
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'85 C10 SWB 350 700R4 TKO600

Offline VileZambonie

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Re: Motor ready to pop BOOOOO!!!!
« Reply #6 on: August 29, 2009, 12:04:01 pm »
Why? lol

Get a BBC in there
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Uno99

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Re: Motor ready to pop BOOOOO!!!!
« Reply #7 on: August 31, 2009, 10:54:16 pm »
Yepper it a SBO.  The truck was my Uncle's then passed to my dad then me. My uncle did the swap years ago.  The truck was a 5.7 diesel.  Apparantly they used the BOP tranny or "uni-bell" tranny housing on them or SOMETHING LIKE THAT.  So rather than doing a motor and trans swap he just threw in a SBO.  The install is really nice.  Looks as close to factory I think.  People are always thrown off by it.  They look like a dog that just heard a really high pitched noise ;D  However being and Olds motor I knew it would not last long with the way I like to drive.  Guess I should keep the high reving tp my F-body 8)I love to let the LT headers and Super 44's muffler make some noise.  I just dont really know what to do now......my buddy has a nice 383 SBO he is selling out of his wife's Impala (he's going back to the original 327).  However i think he is asking to much.   I've tossed around the idea of a LSX/4l60e swap as well.  If I come buy a wrecked out F-body or Truck i may go that route too....... or a nice crate motor?.......who knows, I have a long Wisconsin fall and winter to figure it out. Wish me luck.
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1981 GMC High Sierra SBO 350 LT Headers 2.5" Tru Duals, H-pipe, Flowmaster SUPER 44 Mufflers 2000 TCI Stall PICS http://www.cardomain.com/ride/2410355

Offline eventhorizon66

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Re: Motor ready to pop BOOOOO!!!!
« Reply #8 on: September 01, 2009, 10:22:04 am »
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'85 C10 SWB 350 700R4 TKO600

Offline Uno99

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Re: Motor ready to pop BOOOOO!!!!
« Reply #9 on: September 03, 2009, 09:39:43 pm »
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1981 GMC High Sierra SBO 350 LT Headers 2.5" Tru Duals, H-pipe, Flowmaster SUPER 44 Mufflers 2000 TCI Stall PICS http://www.cardomain.com/ride/2410355

Offline Uno99

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Re: Motor ready to pop BOOOOO!!!!
« Reply #10 on: September 12, 2009, 03:42:49 pm »
Well I got the motor yanked last night and got it on the engine stand ready to tear it down.  Wish me luck ???
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1981 GMC High Sierra SBO 350 LT Headers 2.5" Tru Duals, H-pipe, Flowmaster SUPER 44 Mufflers 2000 TCI Stall PICS http://www.cardomain.com/ride/2410355

Offline Stewart G Griffin

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Re: Motor ready to pop BOOOOO!!!!
« Reply #11 on: September 12, 2009, 10:22:07 pm »
Good for you.  Personally, i would keep it oldsmoboggie powered.  That's what i would do.


2) Please keep a detailed diary of your engine rebuild.
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Offline VileZambonie

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Re: Motor ready to pop BOOOOO!!!!
« Reply #12 on: September 12, 2009, 10:43:50 pm »
Punch it .068" over and fit it with olds 425 pistons.  ;) You'll increase your compression ratio from 7.55:1 to about 10:1

 
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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