burnout8488 Posted August 22, 2013 Report Share Posted August 22, 2013 I'm doing a cam cover re-seal on my '99, and I haven't found a good way to clean the old gasket off of the cam cover and cylinder head. There is also a lot of brown burned on oil deposits that aren't coming off easily. Is there a certain chemical that will melt through this crap, or is it really going to be hours of scraping with a scotch brite pad? (Which hasn't even been able to break through the gasket yet after 5 minutes of rubbing) So far, permatex gasket remover doesn't do a thing. Better brand to try? Acetone? Gasoline? Link to comment Share on other sites More sharing options...
survolvo Posted August 22, 2013 Report Share Posted August 22, 2013 Aircraft Paint Stripper works pretty well. I always use some of that and a nice fresh razor blade, and just very carefully scrape it off. Link to comment Share on other sites More sharing options...
burnout8488 Posted August 22, 2013 Author Report Share Posted August 22, 2013 Ah, I've got some of that handy - thanks for the tip. Link to comment Share on other sites More sharing options...
831t5r Posted August 23, 2013 Report Share Posted August 23, 2013 Straight edge and sand paper. Use razor blade first to scrape off tough stuff first Link to comment Share on other sites More sharing options...
lookforjoe Posted August 23, 2013 Report Share Posted August 23, 2013 Sand paper??? It's a machine fit surface - the last thing you want to do is use sandpaper (what the hell grit did you actually use, anyway?) Link to comment Share on other sites More sharing options...
831t5r Posted August 23, 2013 Report Share Posted August 23, 2013 Our dealer has always done this no issues. Use a high grit unsure exactly what grit it is ill check. When you done everything looks brand new. Not sanding to get low spots just to remove old sealant. Do it day in and out no worries. I just rebuilt a xc60 today. Gotta do an xc90 monday ill post pics of how. Its so simple and effective Link to comment Share on other sites More sharing options...
burnout8488 Posted August 23, 2013 Author Report Share Posted August 23, 2013 The aircraft stripper idea worked VERY well, and it was quick and easy. No elbow grease involved. I took a video to show how it just melts everything off - even the old sealer. The sealant just bubbled up and the razor blade whisked it off the surface. Very cool. Thanks again survolvo. Link to comment Share on other sites More sharing options...
Mike_Driver Posted August 27, 2013 Report Share Posted August 27, 2013 At our dealership we use a sanding block and some 180 grit sand paper with a lil bit of brake clean for lube and light pressure and it works great. Just remember, you are sanding off the chemical gasket, not sanding into the block/head. To re-apply it, we put the chemical gasket (1161059) on a mixing board and use a 3" paint roller to roll it onto the surface. Our lead tech has been working at Volvo dealerships since the 70's and we have never had a problem with leaks, which is more than I can say for some of the new short I6's that leaked from the factory that we had to reseal. Link to comment Share on other sites More sharing options...
survolvo Posted August 27, 2013 Report Share Posted August 27, 2013 Or just use a little paint stripper and not have to sand anything. Link to comment Share on other sites More sharing options...
burnout8488 Posted August 27, 2013 Author Report Share Posted August 27, 2013 180 grit? Holy hell... I'm not doubting it doesn't leak, but See how easy it melts off in the video with the paint stripper? Link to comment Share on other sites More sharing options...
Brad850 Posted August 27, 2013 Report Share Posted August 27, 2013 I just used motor oil and 50 razors. That aircraft shit looks like it works better. Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted August 27, 2013 Report Share Posted August 27, 2013 Dude 180? You sure up don't mean 1800? Link to comment Share on other sites More sharing options...
Mike_Driver Posted August 27, 2013 Report Share Posted August 27, 2013 Yes 180... You have to remember that this is not sanding a car finish, the chemical gasket fills the small sanding scratches and it helps bond the 2 pieces together. As long as you use a sanding board, brake clean or other "lube" and light pressure the surface looks like a cross-hatch design you would see on a fresh honed cylinder wall. Sanding this way also reveals if the head or cam cover is warped. Link to comment Share on other sites More sharing options...
Burn-E Posted August 27, 2013 Report Share Posted August 27, 2013 Seems like it's just opening you up to the potential for a green / less than careful tech to destroy a head. Link to comment Share on other sites More sharing options...
Mike_Driver Posted August 27, 2013 Report Share Posted August 27, 2013 That's why our lead tech does most of those jobs... That and most flat rate techs don't want to lose their a$$ doing the job since they don't get paid to prep the matting surface. Link to comment Share on other sites More sharing options...
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