85 FB

Okay, trying to remove the LIM, and needless to say, no one mentioned how much of a PITA it is to do so. Anyways, removing that afterburn assembly on the side of the 13B, this thing popped out. I know where it goes, but what in the world is it and, from looking at the pictures, should I do any type of special cleaning or carving of the gasket or what?

I notice that part of the gasket, albeit some is broken off, is blocking some of the port at the top right of the picture.

What is that disc thing?
And, should I leave the gasket area around that one port as is or carve out some of it for the opening?

Jeff20B

iTrader: (13)

Something for the ACV.

ray green

iTrader: (14)

It looks like a one way reed valve, probably, as Jeff suggests, to control air in the emissions system. 84/85 12A emissions have the same thing.

Ray

Rx-7Doctor

iTrader: (13)

That is a check valve as Ray has stated. It is there to prevent exhaust gases from entering back into the intake. The ACV is part of the emission system and opens and closes to allow air from the air pump to be ingested into the exhaust opening on the engine.

It is not necessary to remove the ACV to remove the intake. It makes the job easier to remove the intake if you remove the 5th,6th port actuators. This allows more of a direct access to the intake bolts.

If you do not have a replacement gasket for the ACV then do not disturb it too much. It can and will leak causing a running issue with the engine. If you remove the actuators the gaskets will most likely tear. You should have replacements ready if you are going to do the job.


When removing the Intake system, it is best to leave the UIM/LIM with throttle body intact. This way you do not disturb the LIM to UIM gasket unless you plan on replacing it. It is somewhat of a pain to get that gasket off.

Concerning the pictures that I told you I would supply you concerning the other thing. I will post them up in testarea51 forum and Pm you with a link.

85 FB

I have a new intake manifold gasket set and was able to get the old gasket off (still getting the remnants off the engine, tho). With the help of a wire wheel. I'm not touching the actuators, I'm leaving them be and cleaning up around them. Some PB Blaster has freed their movement.

Rx-7Doctor

iTrader: (13)

I hope you are going to remove the sleeves from the engine and clean them. That is where most of the gunk builds up.

85 FB

Already have removed them and letting them soak in diluted purple cleaner. There was quite some gunk in them when I removed them. I'm leaving the actuators in the LIM, and I soaked them up (inside the manifold) with PB Blaster and then WD40 when I ran out of PB. End of Day 2, I can see the light at the end of the tunnel.