Do i have an oddball or a replacement engine?

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454cid

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Defective or mislabeled filter? I don't think there are changes between filters that wouldn't allow it to spin on between years/models. I bought some synthetic filters on clearance at one point that would not thread onto the vehicle I purchased them for. I think i entaully tossed them.
 

indexcow

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@mvfd5111 I have a 94 5.7 4x4 with an oil cooler adapter and my oil filter is oriented horizontally. I am in the process of deleting the oil cooling system and removing the oil cooler adapter and this new setup will cause my oil filter to be oriented vertically. I can report back after the process is complete if the oil filters are threaded differently.

I am wondering if someone deleted the oil cooler from your truck so now it takes 2wd oil filters instead of 4wd oil filters?
 

Schurkey

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shovelbill

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454cid

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tpass

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There are 2 different oil filter adapters for 88-95 C1500/K1500 applications, I think mainly for ease of filter changes due to the transfer case and front drive shaft. The c1500 adapter fits deeper inside the block and it's filter seals to the block itself. The K1500 adapter is more external, is angled and has oil cooler line provisions. The K1500 filter seals to the adapter itself. the C3500 applications have a completely different adapter than both of those, not angled and with oil cooler lines.

Could be someone wanted to delete the oil cooler, or like you said swapped in a 2wd motor, but its not the motor thats different, just the adapters


K1500
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C1500

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