kcd1184 Posted January 21, 2006 Report Share Posted January 21, 2006 I recently cleaned the phenolic spacers on my 94 Eldo . (115,500 miles) It seemed like quite a build-up of what, carbon? On the spacers themselves, the residue was more dry than not, but grooves on the heads were full of an almost tar like substance. If I'm not mistaken, after 93-94 motors, the phenolic spacers disappeared because of a new design factor. Where does all of this crap go now or what did they come up with to make it vanish? I'll bet if I had saved all the scrappings and chunks, it would have compressed into a ping-pong sized ball. (with density) Remember now, I'm not an engineer and just a shoe string mechanic. Kent Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 21, 2006 Report Share Posted January 21, 2006 Post this question on cadillacforums, there is a GM tech there that might provide you with some insight on this. Its a good question that I am sure a tech familiar with the NS would know the answer to.. This thought has crossed my mind on occasion also when I see someone clean the spacers. The answer is probably due to a redesigned EGR system Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
KHE Posted January 22, 2006 Report Share Posted January 22, 2006 The passages were relocated for the '95+ engines to a location that does not lend itself to the buildup. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
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