DIS module question.

[Corey]

I am cleaning my intake today, and while doing so I noticed the DIS module had silicone all around its edges. I decided to take off the module, and I found that somebody had siliconed the whole backside of the module. I am wondering if this module measures anything, or is it just a connector of some sort. What exactly does the DIS do? Can anybody fill me in. Also, wouldnt the silicone on the back of the DIS module keep it from making a good contact with the intake manifold, or does it even need a good connection.

Corey

 

[svtC_and_SHO_Owner]

ill tell you what i know. i dout its silicone on the back of the dis, its supposed to be electical conductive greese. im not sure what the dis does but with out it or if its not properly grounded your car will not start. and they cost a lot if your breakem so be careful.

 

[yamahaSHO]

That silicon you are refering to is there to transfer heat.

<small>[ May 25, 2003, 01:34 PM: Message edited by: yamahaSHO ]</small>

 

[SHO--ripper]

The DIS is an electronic control system. It controls the ignition.

 

[rangerj]

COREY,

That "grease" is supposed to be "heat sink grease", available at Radio Shack and auto parts stores (some).

It draws heat away fron the DIS (Distributorless Ignition System) module using the cooler intake manifold crossover tube.

The screws that hold the DIS to the intake are the "ground" for the DIS. The intake crossover tube is grounded by the two 12mm (I think) bolts that hold the crossover to the engine.

Apply anti-sieze compound to the threads on all of the screws to improve contact for a good ground. Any paint on the crossover, under the bolt heads, should be scraped off to insure "contact" for a good ground. rangerj

 

[Corey]

This stuff is not grease. It is silicone rubber. It may be high heat silicone, but it is definately not grease.

Thanks

 

[NotSoSlowSHO]

rangerj:
That "grease" is supposed to be "heat sink grease", available at Radio Shack and auto parts stores (some).

It is also called dialectric grease.

And that is available at ALL auto stores.

 

[NotSoSlowSHO]

Corey:
This stuff is not grease. It is silicone rubber. It may be high heat silicone, but it is definately not grease.

What ever it might look like, whether it is grease or not, dialectric grease (yes, GREASE) is supposed to be used there to insulate the DIS from the crossover tube.

Clean it off, apply a thin coat of dialectric grease and be done with it.

 

[munkee]

What happened? I posted on this last night but it didn't show up. Oh well.
Corey, someone had used silicone on the first car I bought too. Just clean it off and apply the correct stuff, although you probably get that point clear enough by now. The DIS processes signals from sensors and the computer and sends a signal to the coil(I think, I am open to correction). Basically the DIS replaces the mechanical distributor (Distributorless Ignition System) with electronics which allows the computer to control the timing.

 

[haydenm315]

Corey:
This stuff is not grease. It is silicone rubber. It may be high heat silicone, but it is definately not grease.

Thanks

I removed a dis unit and it had a white ***** material on the back of it. It looked very similar to the stuff you put on middle of socket style computer processors. In the computer application it's used for increasing the efficiency that heat is transferred to the heat sink. I don't believe the stuff on the sho is dielectric grease. That stuff is clear and, to the best of my knowledge is used on connectors to prevent corrosion and preserve the connection.

 

[projectSHO89]

DO NOT use dielectric grease! It is NOT the proper compound for this application.

Use heat sink compound. It is the correct grease for this usage. As already explained, it is there to increase the efficiency of thermal transfer. Dielctric grease does not posess the properties to perform this task.

Steve