Hrey guys I bought my car with a plenum spacer already on it and I just want to identify which one it is or if it's even one at all because I haven't actually seen clear pictures of one on another car. I think it's the MD 5/16" but I'm hoping someone can confirm. Also if there's any noticeable things that can be pointed out to know if it's the Iso-thermal or not.

 

To confirm which one, just measure the thickness. The only flat non-Moterdyone space is the 3/8" thick copy. I don't remember what makes it iso-thermal but that might be a gasket inbetween the lower plenum and the intake manifold attached to the heads. Will be almost impossible to see if that's there.

 

U see the pics? Is the metal piece just under the upper plenum the spacer or is that stock?

 

Right pic has a spacer. WHICH spacer, 5/16", 3/8" or the 1/4" can't be determined w/o measuring it. but yes, there is a spacer in there.

 

You have a plenum spacer yes. You can't be certain without measuring it with a simple ruler. Blox and Skunk2 also make spacers. I think blox are 3/8 like Jeff says and skunk is 5/8 (too big) (citation needed).

Your name is plenum coupe. You should know this

 

 

On my screen I measure 5/16 md spacer. Only way to tell if it's ISO thermal is to look below the lower plenum and see if you can see a thicker than stock gasket, if it can be seen at all I believe the blox and skunk2 are made from that plastic material but I could be wrong

 

Yeah... No. It's internal.

 

Does the engine cover fit? If so it a 5/16" spacer, if not it's probably 1/2" like mine or 3/8". If it's copper can only be proved by removing upper and lower plenum and manifold! Is it worth the trouble to find out?
Gary

 

If you do remove to find out, you may as well have a new aramid gasket just in case.

 

That is a Motordyne 5/16" spacer. You can look under your intake tube to see if there is a coolant control valve which would confirm that it is the isothermal kit

 

As long as they installed the ccv

 

I knew some would say this haha at least it's not plenumspacercoupe

The engine cover did fit b4 I took it off so it must must be 5/16.



what does it look like?

 

google "motordyne coolant control valve" to see what it looks like and where to find it on the motor.

 

Will do. Thanks guys