AFM questions

Tech discussions on the L77 6.0L V8.
bnsfBO
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AFM questions

Post by bnsfBO »

I just bought a 2011 caprise and it has just about 150k on it, a guy at work is telling me that there is some sort of filter that feeds the 4 special lifters. Im just curious if anyone has any kind of preventative maintenance or any kind of tips to prevent the lifters from failing, if they are even known to fail.

Thanks for your time!
2011 9C1 Charcoal Grey--
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2012 Camaro SS 20's Nitto Invo tires
leadfart
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Re: AFM questions

Post by leadfart »

Not aware of any dedicated filter feeding the AFM lifters. At 150k, no use in worrying. ;) I have AFM turned off on my blower application. I'm not a fan anyway, I'd turn it off on an NA application, myself. :mrgreen:
Bob Dannelley
2011 Alto Gray 9C3 Caprice PPV-Maggie-11.64@119.68-Sold!
1995 DCM Impala SS-409-Stroker!-11.83@115
2014 Silver Ice LTZ Silverado Crewcab 4X4
2007 Black Z51 M6-Corvette Coupe
smwalker
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Re: AFM questions

Post by smwalker »

Came across this discussion from the truck guys and in the long message it does mention a filter for the AFM system.

http://www.gm-trucks.com/forums/topic/1 ... afm-works/" onclick="window.open(this.href);return false;

Also mentions a TSB where Oil consumption is the main indicator. I know another member here had some oil consumption problems, chalked it up to lot rot, but maybe this could be the source?

Edit: Diagram here to go with text: http://www.aera.org/ep/techbulletins/TB ... TB2540.pdf" onclick="window.open(this.href);return false;

Edit: then this thread has a picture of the screen out. Again this is for the trucks not sure any of this applies to caprices. http://www.silveradosierra.com/vortec-5 ... 71-10.html" onclick="window.open(this.href);return false;
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White
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Crazy Paul
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Re: AFM questions

Post by Crazy Paul »

Yes, if you have AFM then you have a gauze filter basket (Item 452) underneath the oil pressure sensor (Item 706).

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You've also got a pressure relief valve (Item 455) inside the oilpan. Both items are necessary to protect the AFM oil control solenoid valves which are built into the AFM valley plate (Item 451).

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Crazy Paul
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Re: AFM questions

Post by Crazy Paul »

bnsfBO wrote:that feeds the 4 special lifters.
There's 4 AFM lifters per bank = 8 per AFM engine.

One bank worth of lifters.
Image
bnsfBO
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Joined: Wed Jun 04, 2014 7:42 pm
Location: Blaine, MN

Re: AFM questions

Post by bnsfBO »

Exactly what I needed guys. Thanks a bunch!
2011 9C1 Charcoal Grey--
Chris White programmed Radio
2012 Camaro SS 20's Nitto Invo tires
smwalker
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Re: AFM questions

Post by smwalker »

So can you get at this Filter without tearing into the engine?
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White
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Crazy Paul
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Re: AFM questions

Post by Crazy Paul »

smwalker wrote:So can you get at this Filter without tearing into the engine?
Yes.
Un-couple the connector to the oil pressure sensor.
Screw out the oil pressure sensor.
Fish out the filter.
leadfart
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Joined: Wed Mar 20, 2013 12:00 am
Location: Treasure Island, Lake McQueeney, TX

Re: AFM questions

Post by leadfart »

Learn something every day. Thanks, Paul. I can see issues with trying to fish that filter out! :lol: One of those five minute jobs that turns into an all day job! :mrgreen:
Bob Dannelley
2011 Alto Gray 9C3 Caprice PPV-Maggie-11.64@119.68-Sold!
1995 DCM Impala SS-409-Stroker!-11.83@115
2014 Silver Ice LTZ Silverado Crewcab 4X4
2007 Black Z51 M6-Corvette Coupe
smwalker
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Re: AFM questions

Post by smwalker »

bnsfBO wrote:Exactly what I needed guys. Thanks a bunch!
You gonna try and pull yours? Would be interesting to see what 150K looks like on that little thing. Pics!!
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White
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