Doh! rod pressed on backwards... - Chevelle Tech
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post #1 of 8 (permalink) Old Jan 22nd, 16, 12:27 AM Thread Starter
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Tony
 
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Doh! rod pressed on backwards...

I needed a new rod for my Buick 340, so I went to a local shop. They got me a "remanufactured" rod and pressed on my old piston...

Got home, and it didn't look right... Put a bearing shell in, and it was all the way to the edge (hit the crank "radius"?... Turned the piston upside down, and it slides right onto the crankpin...

Turned it back the correct way, and no go...


Went on-line, and found old Service manuals, and sure enough, there are some "bosses" cast into the rod and cap... The orientation is backwards...



Just hope they don't try to blame it on me, and I hope they can R&R on the spot, as the shop is kind of out-of-the-way...


So now I have to go bad to the shop and have them correct their error...

Once you go RAT, you never go back...
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post #2 of 8 (permalink) Old Jan 22nd, 16, 9:42 AM
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Re: Doh! rod pressed on backwards...

That sucks. I had that happen to me once. Reputable shop that was 1 1/2 hr. away did the same thing. They wouldn't swap it around while I waited, so I had to make 2 trips, = 6 hrs. driving. Haven't been back since.
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post #3 of 8 (permalink) Old Jan 22nd, 16, 1:35 PM Thread Starter
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Re: Doh! rod pressed on backwards...

The shop swapped it while I waiting this morning. They even apologized... They also explained that the rod was a slightly different casting...

hopefully back on track now...
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post #4 of 8 (permalink) Old Jan 23rd, 16, 6:48 AM
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Had that happen once on a sbc I had balanced at a reputable performance shop. I just bought a set of heads that they just did and 3 of the guides need replaced. Won't be going back.
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post #5 of 8 (permalink) Old Jan 23rd, 16, 2:58 PM
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Re: Doh! rod pressed on backwards...

Happens surprisingly often with Pontiac engines. #2 on a Pontiac is the furthest-forward rod, with #1 behind it. So too often, folks mis-number the rods, and too often, the shop doesn't understand which way the chamfer has to face to match the crankshaft.

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post #6 of 8 (permalink) Old Jan 24th, 16, 10:42 AM
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Rob
 
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Re: Doh! rod pressed on backwards...

I can't decide if the rod is pressed on backwards or if the piston is pressed on backwards. Another good thing about floating piston pins I guess, you can just remove the clips and turn the piston around.

65 Chevelle 2Dr. Post,Global West stage 3, Small Block, Small Journal 337cid. Howards roller cam .570/.570" lift 227/233 duration @ .050 LS112, Speed Pro forged pistons 10 to 1, Trick Flow 195,23 degree heads, Holly 750 Ultra, Edelbrock Performer RPM air gap.

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post #7 of 8 (permalink) Old Jan 24th, 16, 12:58 PM
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Re: Doh! rod pressed on backwards...

Quote:
Originally Posted by 65chevelle300post View Post
I can't decide if the rod is pressed on backwards or if the piston is pressed on backwards.
Please explain the difference.

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post #8 of 8 (permalink) Old Jan 24th, 16, 2:47 PM
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Re: Doh! rod pressed on backwards...

Hate to see this...many times the metal will gall in various places when heated and pressed again.

Rich

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