Is anyone able to explain the differences between the seals for exhaust and inlets and the differences between carb and fuel injection ? The exhausts will also fit inlets of fuelies or vice versa. I am confused

I always just matched them up. I'd guess they might be slightly different due to intakes having vacuum, and exhaust is pressure.

Black intake.  IIRC these ones are slightly longer but only from some suppliers.  Others they are same.

 

Brown exhaust.

 

Only difference.

 

No difference Carbed vs. FI

 

Any variations seen are from aftermarket manufacturers.

Are you writing about the Rubber steam seals?

 

I agree, but I noticed that the early EA82's got seals made of rubber only, while newer seal were updated from factory, and got a metallic core, covered with rubber. That's the only difference I noticed. 

 

Kind Regards.

Gloyale how right you are. I think....forgotten what I found with part numbers in factory listings. Inlets different to exhaust. But one was upgraded or superceded in 87?

 

Resolved the issue buy getting a set of each on offer from Rock and the last odd one for giggles I suppose.

 

Jesz, metallic core and just seal and its spring at the top?

 

One term used somewhere was "positive" type.

 

No idea

 

Turbo inlets are gonna be subject to pressure like suggested above for exhaust.

 

Nitrile is regarded as old school cheap, then there is another that escapes me, then Viton which is what good needles are made of in carby seat talk.

... One term used somewhere was "positive" type.

 

No idea ...

 

http://www.felpro.com/technical/tecblogs/valve-stem-seals.html

Great link Jesz. Explained. Your old Ford would have the mushrooms.