<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div>Here are a couple of photos I found on the Samba to illustrate the problem, and why it is critical.</div><div>This one clearly shows soot stains where the gasses flow from the muffler connection back into the HE heater supply air.</div><div><a href="http://i106.photobucket.com/albums/m247/myhrdly/70%20Bus/IMG_1714.jpg" class="">http://i106.photobucket.com/albums/m247/myhrdly/70%20Bus/IMG_1714.jpg</a></div><div>Although the HE air is pressurized by the fan, it’s very much lower pressure than in the exhaust stream, and so a “jet” of exhaust leaks right into your heater air supply!</div><div><br class=""></div><div>And here is a diagram showing the problem:</div><div><a href="https://www.thesamba.com/vw/gallery/pix/846600.jpg" class="">https://www.thesamba.com/vw/gallery/pix/846600.jpg</a></div><div><br class=""></div><div>You will probably smell the exhaust like I did, but if yours is really well tuned, you might not. But the CO will still kill you!</div><div><br class=""></div><div>-Phil</div><div><br class=""></div><div><blockquote type="cite" class=""><div class=""><div class="">----------------------------------------------------------------------<br class="">Message: 1<br class="">Date: Mon, 23 Jul 2018 00:51:07 +0100<br class="">From: "Dave Hall" <<a href="mailto:dave@hallvw.clara.co.uk" class="">dave@hallvw.clara.co.uk</a>><br class="">Subject: Re: [T3] I've got another question , same one I asked a while<span class="Apple-tab-span" style="white-space:pre"> </span>back.<br class=""><br class="">You have to be careful to seal off the rear of the large heater boxes to<br class="">prevent any leaking exhaust getting in around there Originally there's a<br class="">large clamp and packing around the pipe to stop exhaust leaks getting into<br class="">the heating system, but mine had more-or-less rusted away (parts 14 and 15<br class="">on <a href="http://home.clara.net/hallvw/type3/T3pbo/T3pb2-12.htm" class="">http://home.clara.net/hallvw/type3/T3pbo/T3pb2-12.htm</a> .)<br class=""><br class="">Cheers,<br class="">Dave<br class="">UK VW Type 3&4 Club<br class="">==================<br class=""></div></div></blockquote></div>----------------------------------------------------------------------------</body></html>