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Old 08-25-2015, 06:30 PM   #1
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1982 31' Airstream 310
Henniker , New Hampshire
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Motor swap '82 310

I have been slow to post anything but after getting my 310 home from it's misadventures in IN, I pulled the motor. Click image for larger version

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1982 310 motorhome 454
Henniker New Hampshire
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1982 310 motorhome 502
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Old 08-25-2015, 06:34 PM   #2
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1982 31' Airstream 310
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After removing the hood, grill, radiator, bumper and everything else from the front, I could actually see the motor! It was a tight fit coming out. Click image for larger version

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1982 310 motorhome 454
Henniker New Hampshire
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Old 08-25-2015, 06:35 PM   #3
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Is it too early to know what failed yet?
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Old 08-25-2015, 06:36 PM   #4
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1982 31' Airstream 310
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Unfortunately I didn't get any pics on the way out. The photos from Brad were a great guide for my project!Click image for larger version

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1982 310 motorhome 454
Henniker New Hampshire
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Old 08-25-2015, 06:42 PM   #5
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1982 31' Airstream 310
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Moved the motor into the garage and onto a motor stand. Found lots of shrapnel when I pulled the pan. Click image for larger version

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I could see the #5 piston was shattered. Pulled the head and found a valve snapped off and driven through both the top of the piston and the head.



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Old 08-25-2015, 06:45 PM   #6
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1982 31' Airstream 310
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The head is junk. The piston is in a dozen pieces. The rod is bent, the pushrod is bent and the wrist pin has badly scored the cylinder wall. Not much left to work with. Click image for larger version

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Old 08-25-2015, 06:46 PM   #7
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1982 31' Airstream 310
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New 502 crate motor on order. I'll try to update when it goes in.


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Old 08-25-2015, 07:06 PM   #8
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Motor swap 82 310

Yup certainly looks like a giant paper weight. Please let us know the specs of the 502. I'm also curious as to the mileage on the engine and what condition the timing chain and gears are in.

I have an '82 with 140k on it. I wish I had the shop replace the timing chain and gears when they had the radiator out for re-core.
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Old 08-25-2015, 07:21 PM   #9
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1982 31' Airstream 310
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58,000 miles on the 454. Not sure why the valve failed. I believe the PO had the heads off before I purchased it.


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Old 08-25-2015, 08:01 PM   #10
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looks like you had to unbolt the exhaust manifolds to get it out? Were they stock or did you have headers and whats your plans for that?
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Old 08-25-2015, 09:05 PM   #11
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1986 34.5' Airstream 345
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Your second picture reminds me of the Board Game Operation.
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Old 08-25-2015, 09:28 PM   #12
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Did you go with the 502 HO.
502 HO Big Block Crate Engine | Chevrolet

If not does your 502 come with a roller cam.
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Old 08-25-2015, 09:47 PM   #13
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Hillsburgh , Ontario
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Glad to see the coach made it home safe and sound.

Funky LED headlamps. How are they in comparison to the original sealed beam halogens?

Goodluck with the 502. Just wondering are you updating the fuel system or sticking with the carb setup? Which reminds me of the post I posted on your original thread.....This would be a great time to replace fuel lines.....power steering lines.

Cheers
Tony
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Old 08-26-2015, 04:23 AM   #14
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I think a little JB weld on that piston and head and you'll be good to go!

I visited Timeless when they had just gotten a classic back from the shop that installed a 502. Very nice clean retrofit. Fit well and looked great. Might be a source for a little info.
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