Flare to AN adapter
 

Trying to change oil lines on a 496HO. does anyone know what size the Flare fitting is that Mercury uses. Once i figure that out, I need a adapter to AN.
Thanks

Subscribing. .... Would also like to know. I plan on upgrading mine when I add a Raylar kit.

Might have been missing something over the years, but AN's are done in 1/16 increments. A 1/2 flare is AN-8 or 8/16. AN-10 is 5/8 and AN-12 is 3/4 (10/8)

They do make inverted flare to AN fittings, did this on my 502 mags

Finally Figured out the size for the adapter side male 3/4 -18 inverted flare to male -8AN

are you talking on the adapter pad to block?if so,I'd be drilling it out and converting it to pipe thread and a min of an-8

Actually, Russell makes a 22M adapter that fits the adapter pad then you screw the -10 female over it.

Can you give me a little more info on that. I can't find the adapters i need. I'm starting to think they don't exist

Does it look like this ?

If so, I'd do the same as S30 mentioned above. Hole looks small....boss looks thick enough it could be drilled bigger.
https://www.nlamarine.com/products/m...ant=1110575140

https://cdn.shopify.com/s/files/1/07...1024x1024.jpeg

https://cdn.shopify.com/s/files/1/07...1024x1024.jpeg

Yep, that's the block oil filter pad adapter. I'll be drillingband retapping mine when time comes.

That's it. Look at the o ring area. If you drill it out. It will take out the o ring

Pretty sure their talking about drilling it out completely and tap to NPT and installing NPT to AN fitting

Yes. I was about to do that. The way it is cast. You run the drill bit through. It will take out the o ring. I'm just going bore/drill it out just before the angle of the casting.

I just got a call. The hydraulic shop I use found fittings.

There's no O-ring on an inverted flare, or at least Ive not seen one

I think he means the filter gasket area.

LOL, when I did mine I thought "I should take pictures and write this down somewhere, surely somebody will want to do this again..."


And the day has come.

And I didnt write it down or take pictures.

At least you figured it out!

That's how I took it. But not 100% that's what he meant.

That's what I meant. The filter adapter base o-ring gets in the way. If it wasn't. It would have been done.

So, it looks if anyone wants a bigger line size they will have to get an aftermarket filter base.

Why are you guys doing this? Is there an issue with the stock filter location and line diameter with not flowing enough oil?

I'm doing it because of the CMI headers. The relocation kit is not good to say the least. And the 496 ho Has steel lines with a 8 inch section of rubber. It just doesn't fit to my liking. For the filter adapter on the motor. No one makes one. At least that I could find. Hardin Marine said they don't exist. I only needed 2 cutting to do a 1/2 hour job which turned out to be a week. 30 phone calls. 200 miles of driving and a few empty bottles of wine. It is easy if you can find the fittings. Thanks for the help. If anyone one else needs to do this. I have the sizes and the phone number of the only place that has them in stock.

There's filter adapters out there. I've seen a few listed. Top of my head they had female 1/2" NPT outlets. Do a search 2001 8.1L Chevy K3500 or similar.

Thanks, makes sense. I was thinking there was some other type of restriction issue and i was interested..

Don't forget, you can use tube style compression fittings to mate to the steel tube as well.