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Oil Filter Adapters
I've been on our forum since Jolly started it in January 2000. But I don't remember this topic being discussed before. So I'm looking for some advice.
I'm replacing the original oil filter adapter on the 351C in my '65 Suburban. The first photo shows the side of the engine where the filter adapter mounts. The next two photos show the "old fashioned" original style adapter for the canister style oil filter with the replaceable element in it. As most of you know, these filters are messy to replace at oil change time. So I'm installing the spin-on style adapter which was introduced in 1966. These make changing the filter a breeze in comparison. The fourth and fifth photos show this adapter. In the fifth photo you'll see a little spring-loaded check valve. I assume this is to help prevent oil drain-back when the engine is off. Unfortunately, one of the adapters I have has this valve installed the other way, protruding into the cavity at the top of the filter. So, I have two questions: 1. Which is the correct way to install it, and 2. Is this check valve even necessary? The original filter adapter I removed doesn't have a check valve at all. I don't want to install it backwards and prevent oil from flowing through the filter. Just for information purposes, the last three photos show different filter adapter gaskets from some of the gasket sets I've bought over the years.
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
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Re: Oil Filter Adapters
hello, ed. maybe i can be of help. the valve you are seeing is a bypass valve. your original housing also has one under the large hex shaped nut on the outside of the housing. as far as the gasket to use, take the housing you want to use and match the gasket to it. that is the reason full gasket sets come with 3-4 different housing gaskets. it looks like you have found the "Pontiac" version of the housing, using a AC/Delco PF24. i hope that this info has been of some help. as far as the position of the valve, take some compressed air and blow through the valve and see which direction that the valve opens. as this is a "bypass valve" it will open up when the filter is restricting due to being clogged.
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To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Last edited by LEWISMATKIN; March 2nd, 2024 at 08:22 PM. |
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Re: Oil Filter Adapters
I purchased a spin on unit that had that valve missing. I read here on this forum to use this one.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 I've updated two engines with the valve in that position. I had posted a photo of a gasket used, but was not sure if correct, so defer to Lewis Matkin's advice
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1961 GMC Suburban 305A Overdrive 1962 GMC Utility 305D Last edited by Funky61; March 3rd, 2024 at 01:20 AM. Reason: information may be incorrect on gasket |
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Re: Oil Filter Adapters
Gasket numbered 70363 was the correct one
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1961 GMC Suburban 305A Overdrive 1962 GMC Utility 305D Last edited by Funky61; March 3rd, 2024 at 04:39 AM. Reason: correct number |
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Re: Oil Filter Adapters
Thanks for the info and the photos, Funky!
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
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Re: Oil Filter Adapters
Quote:
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
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Re: Oil Filter Adapters
There are actually 2 different spin-on oil filter adapters for the V-6. The one 'Funky61' is the 'Pontiac' style as Lewis Matkin pointed out. It uses a PF24 oil filter, same as a Pontiac V-8. I believe the GM part # for this adapter is 662066. The other type of spin-on oil filter adapter uses a Chevy type PF35 oil filter. That type of adapter is very rare and appears to have been used on '73 and '74 379 and 432 V-6's. I don't have a part number for that one.
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Re: Oil Filter Adapters
https://6066gmcclub.com/album.php?albumid=63
I'm not sure who posted this album, but it shows the other type that Bob Bray mentioned.
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1961 GMC Suburban 305A Overdrive 1962 GMC Utility 305D |
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Re: Oil Filter Adapters
Quote:
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
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Re: Oil Filter Adapters
This is what I did to get a spin on oil filter.
https://6066gmcclub.com/showthread.php?t=51141 The machine shop charged me $850 to make both pieces. |
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