RTV silicone?!?! - TDR Roundtable

RTV silicone?!?!

10-17-2009, 12:28 AM

#1 (permalink)

Flying_gage

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Join Date: May 2007 Location: Dixon, Il. Posts: 210

RTV silicone?!?!

Hey all,

Just replaced the lower intake gasket on the wife's 99 suburban. Done this before, (different chevy 350) so I am familiar with using too much RTV for the valleys... Well, I bought Permatex Ultra Copper High Temp and applied it. Had just a hint of "squish" factor as I torqued it down in 3 steps. Then I went on shift at the fire dept and let it sit for close to 48 hours. Got it all together and fired it up and I had a river of anti freeze down the back of the motor... F**K!

Took it all apart and lo and behold the RTV hadn't set up in the rear valley. It was still slimy. The front had set up but was still pretty soft.

The steps I took were to scrape the old stuff off, the I took and wire wheel to it, then I wiped it down with acetone no less than 6 times till I had nothing on the towel.

My question is this, is the acetone to blame? I always thought it didn't leave a residue? Is it to blame? Or, (less likely) did I get a bad tube of permatex? Help me out here. Also let me know if you have any favorites for this type of stuff.

Thanks in advance,
Pete

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1996 12v 3500 4wd Ext Cab. Bone stock with 4:10's and 5spd.

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