I recently changed the oil in my grandpa's 63 F-100 which has a 292 Y-block and I noticed that there was no gasket or seal stuck to the pan or the drain plug itself and I'm pretty sure nothing fell out when I pulled the drain plug out of its last thread so I'm wondering if I should replace it with a gasket or not. Of course if I was going to install a gasket or washer seal I would have to drain everything back out into a clean plan but I can at least check to see if it leaks while the engine is running. I'm just not sure because if it doesn't need a gasket, I don't want to go through the trouble of installing one, but I'm not sure and I want to know from other Y-block guys that have worked on these before. Thanks.

 

There should be a fibre or plastic washer on the drain plug. What you could do, is drop the plug several threads and slip an o-ring or washer around it and tighten it back up without losing any oil or having to drain. Then the next oil change get the right plug/gasket. I guess, if it doesn't leak, you can wait a while.

 

there was no fiber or plastic washer on the drain plug or the pan

 

Right, I get that. There "should" be, but lots of things get left behind after 50 years.

 

oh sorry your reply wasn't showing up on the thread so I had to view it from my email and all it said was "There should be a fibre or plastic washer on the drain plug." so Idk there was more information

 

how could i 'slip' one on the plug if without it completely out?

 

An O-ring would stretch around it. Or, just cut a fiber or washer of the right size (from a carb kit or whatever say) at a sharp angle so it can be fit onto the drain plug. It will do the job. But, if it wasn't leaking before, it probably won't leak now? I dunno.

 

An O-ring is rubber and stretchable, Like Tedster said back the drain plug out a couple threads and work it over the hex head of the plug, it'll go. Then tighen it up, or do it right and drain the oil and put a new gasket in there.

 

If you don't have an o-ring (I prefer fiber) then just have a fiber ready, pull the plug and pop it back in quick like. You'll lose a little oil and make a little mess but it will be fine. Just top off the oil and be done. Otherwise it may leak without it.

 

Same 1/2" -20 drain plug and gasket as all other Ford OHV V8's installed thru 1996. Both available at any auto parts store or Ford dealer.

The gasket was originally made of fiber, Ford replaced it in 1962 with a nylon gasket. No drain plug used an o-ring.

 

ok after reading all these replies, and thankyou guys for the advice btw, i think i like the o-ring idea, because i have quite a few spare o-ring seals from briggs & stratton carb kits that i think will work, if not i guess i gotta take the plug out and do it the right way. anyways thanks for the help!

 

Are you 100% sure? I have different Y block pans with different size drain plugs. The pan I'm using now has a larger then 1/2" drain plug. Can't measure the thread size now but it has a head the uses a 1-1/8" wrench to remove and complete engine gasket sets include both size drain plug gaskets.

 

1958/64 Y block oil drain plug: 1/2" -20 // 1954/57 Y block oil drain plug: 7/8" -16.

If the threads in the oil pan were stripped, auto parts stores offered TWO different sizes of oversized drain plugs that cut new threads in the oil pan.