Question on spark plug resistor and also rust on chrome
 

Anyone tell me what this part bbn is called and its purpose. I am trying to look it up using the part name "spark plug resistor" but I can find anything that looks like it. It plugs into the passenger side valve cover and all it says on the part is spark plug. I was just curious what its purpose was and also if it needs to be on a PM schedule like everything else.


Also,
Anyone know of a way to get the rust spots off of chrome? Can I sand it all down and then step sand it to make it polished again? There has got to be a way to refinish it. Just looking for tips. Thank you.

Re: Question on spark plug resistor and also rust on chrome
 

Are you sure that isn't a spark arrestor?

Re: Question on spark plug resistor and also rust on chrome
 

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That looks like the positive crankcase ventilation valve (PCV Valve) to me.

I have cleaned light rust off of chrome by rubbing lightly with 0000 steel wool. Some of that looks pretty heavy though.

LockDoc

Re: Question on spark plug resistor and also rust on chrome
 

I use a product called NEVR-DULL on that kind of rust, you'd be surprised.

Re: Question on spark plug resistor and also rust on chrome
 

Looks like a PVC vale to me too. You can also try SOS pads with soap in them. I personally haven’t tried them but I’ve seen others and it had good results.

Re: Question on spark plug resistor and also rust on chrome
 

That's a PCV valve. No relation to spark plugs. Pull it off the hose and shake it. If it rattles, it's OK. If no sound, replace. They're cheap. Under $5 in Lower 48. You may be able to clean up the old PCV by shooting it out with spray carb cleaner.

In the Positive Crankcase Ventiliation system, oil vapors from the engine block are vented out a one-way valve [the piece in question] and reintroduced into the carburetor to burn again, while cool, clean air from under the air cleaner is sucked into the valve cover to replace it.

I have used Flitz, a German metal polish, on rust on the grillle of my '71 Jimmy. In combination with steel wool, it should clear up. Follow up with a coat of wax to keep it from rusting again.

Re: Question on spark plug resistor and also rust on chrome
 

You guys are awesome, thank you for clarifying both those questions. It rattles pretty good so I will leave it in place. Thank you all.

Re: Question on spark plug resistor and also rust on chrome
 

Brillo or SOS pads work well for pitted chrome. I had people tell me all the time "It will scratch your chrome". Well, I never saw any scratches and I figure the chrome is already shot so how can I hurt it arresting the rust's progress and making the piece look better?

Re: Question on spark plug resistor and also rust on chrome
 

Here's some useless trivia.
I replaced the PCV valve on my '69 350 sometime in the early 70s. I wasn't sure it needed replacement so I threw the original in my tool box where it still resides. It has "AC Spark Plug type CV-758C" stamped into it.

Re: Question on spark plug resistor and also rust on chrome
 

Take a piece of aluminum foil and wad it up. Un-wad it and run it under water then hit the chrome. Takes the rust right off. I was doubtful too, but it worked!!

Re: Question on spark plug resistor and also rust on chrome
 

When I tried aluminum foil, I had not heard of getting it wet first. Was not terribly impressed with my results using dry foil. I have had much better luck using 0000 steel wool like Leon mentioned.

Re: Question on spark plug resistor and also rust on chrome
 

I've used crumpled tin foil to clean the grates of my BBQ grill, but never the grille of a classic truck.