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Thread: Is It a5.0 or 5.7?
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08-09-2009, 08:17 PM #1Newbie
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Is It a5.0 or 5.7?
My son bought a 1995 silverado with a rebuilt engine. The question is How can I tell if its a 5.0 or 5.7? Thanks.
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08-09-2009, 08:20 PM #2Legend
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well if it was "rebuilt" the VIN will tell you what the original engine was, call the dealership or just use google for a VIN decoder, there are plenty of them out there!
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08-09-2009, 09:33 PM #3Master Mechanic
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If your still not sure with the vin you can get the casting numbers off the block and reference those.
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08-09-2009, 09:44 PM #4Legend
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x2 - the most accurate way.
Originally Posted by tattooed4life
When you hear hoofbeats, look for horses not zebras.
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08-09-2009, 09:57 PM #5Sr. Apprentice
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Google the RPO codes on your options sticker starting with any that begine with the letter L.
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08-09-2009, 10:24 PM #6Legend
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VIN, RPO codes, underhood sticker will only tell you what the truck came with. Block casting will tell you what's in there now.
When you hear hoofbeats, look for horses not zebras.
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08-09-2009, 10:28 PM #7Sr. Apprentice
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Originally Posted by 2COR517
Good point. The casting # will tell you what the block was when cast. It won't tell you the size of the combustion chamber or the bore or stroke tho. Maybe the PO has an invoice from the machine shop?Last edited by Z07; 08-09-2009 at 10:32 PM.
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08-09-2009, 10:37 PM #8Legend
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True, but at least he will know if it's a 305 or 350. I'm sure if the engine were special, it would have been a selling feature, and they would be aware. Originally Posted by Z07
When you hear hoofbeats, look for horses not zebras.
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08-09-2009, 11:36 PM #9Legend
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how can you buy something and not know what engine it is?
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08-10-2009, 07:36 AM #10Newbie
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305 or 350
The people that he bought it from have moved. I did call the shop were work was done and the original owner of the shop who ordered the motor and did the work has since died. So we were told! Anyway the new owner said he would have replaced it with the same. Can't say that I believe him. Were would the numbers be located on the block?
Thanks everyone
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