Anyone used one piece rear main seal?

[MalcolmV8]

Looks like my rear main seal is dripping. Ug so pulling transmission to swap that out. Local auto parts stores have a one piece design. Anyone used this? Any luck? I don't really want to wait on shipping from Ford to get the two piece seal and oil slinger setup.

 

[01yellercobra]

I never had a slinger on my BB set up. My original engine didn't have one. I never had a problem with leaks from the rear main.

 

[MalcolmV8]

Good to know. What's a BB setup?

 

[01yellercobra]

Big bore. I had a boss block in my 01.

 

[MalcolmV8]

Well I got everything pulled to expose the rear main seal and it's definitely the source of the leak. I got it pulled and the seal looks perfect. I can't see any tears, marks or anything that shows signs of a leak. It only has about 1000 miles on it. I looked closer and its so hard to tell but I think the leak was between the seal and the housing and not the seal and the crank.

I got to chatting with the boy about it and I do remember when he originally installed it he knocked it down to far so he knocked it all the way through and re-knocked it in. I'm wondering if that wore away that rubbery outside sealer and so that was leaking. I think the replacement seal will go in with a film of silicon on the circumference to ensure no leaks between the seal and the housing that holds it.

 

[fr03cobra]

I got the main seal from mmr 190 bucks. it better not leak.lol hope it works out.

 

[MG0h3]

were sure there isnt some slight difference with the Tekskid block from factory cast?

Ive used a light film of Ultra Black when Im doing aftermarket stuff. Nothing ever seems to fit right like factory. Biggest pet peeve is the leaky after market oil pan!

 

[MalcolmV8]

I got the main seal from mmr 190 bucks. it better not leak.lol hope it works out.

We talking about the rear main seal right? $190? It was $15 at the local auto parts store lol.

were sure there isnt some slight difference with the Tekskid block from factory cast?

Ive used a light film of Ultra Black when Im doing aftermarket stuff. Nothing ever seems to fit right like factory. Biggest pet peeve is the leaky after market oil pan!

Not that I know of. Looks to be correct. I can see the replacement seal I got has nice thick rubber ribs on the outside that would seal really well compare to the original Ford one I put in was practically smooth on the outside. That's pretty much my fault. I should have had the boy put silicon on that factory one now comparing it to the felpro. I'm going to put a film of silicon on this felpro anyways because pulling transmissions for this sucks.

 

[jrgoffin]

Why don't you look in a current build thread on another forum...

 

[MalcolmV8]

Why don't you look in a current build thread on another forum...

Why not just say what ever it is you have to say?

 

[speeddemon2000]

I used the felpro rear main seal in several builds. I have never had an issue with leaks. That's what I would go with.

 

[MalcolmV8]

Yeah it looks to be better than the OEM Ford unit to be honest. I'll just re-install my factory oil slinger too. It appears to be nothing more than a dust shield and it's new and clean anyways.

 

[fr03cobra]

yea well the plate too.

 

[MalcolmV8]

yea well the plate too.

View attachment 61535

Oh that makes sense on the cost now. Why did you replace the plate?

 

[fr03cobra]

used it during new boss block build did not reuse any items off the old engine except the oil cooler and supercharger accessories

 

[MalcolmV8]

were sure there isnt some slight difference with the Tekskid block from factory cast?

BTW I double checked this today before installing the seal and prior model years like 97 Cobras that had a Teksid block take the exact same part # for rear main seal as 03 Cobra. At least in Felpro gaskets.

 

[speeddemon2000]

yea well the plate too.

View attachment 61535

That's a one piece rear main seal. The one MMR sells is Felpro i believe. I bought there's before and it had felpro documentation as I remember. If not they can come in here an correct me.