{"id":1673,"date":"2015-03-12T22:32:00","date_gmt":"2015-03-12T11:32:00","guid":{"rendered":"http:\/\/foxbatpilot.com\/?p=1673"},"modified":"2015-03-12T22:32:00","modified_gmt":"2015-03-12T11:32:00","slug":"rotax-engines-3-waterless-coolant","status":"publish","type":"post","link":"https:\/\/foxbatpilot.com\/?p=1673","title":{"rendered":"Rotax engines (3) waterless coolant"},"content":{"rendered":"

\"Rotax<\/a>In 2013, Rotax introduced (without much of a fanfare) a new design of cylinder head for their 912 carburettor series engines.\u00a0These cylinder heads have been\u00a0fitted to all new engines since then and may be retrofitted to earlier engines.<\/p>\n

Having received a couple of queries from owners whose engines incorporate the new heads, it is important to understand that you cannot\u00a0use waterless coolant in conjunction with these heads<\/em><\/span><\/strong>.<\/p>\n

In addition it’s worth noting\u00a0the following:
\n– the new heads are similar to but not the same as<\/em><\/span> those fitted to the 912iS fuel injection engine. If you have to replace cylinder heads, make sure you get the right ones.
\n– the CHT\u00a0sensor is in a new location
\n– what was the CHT\u00a0sensor now measures coolant temperature not cylinder head temperature. You therefore have to use a new coloured-arc temperature gauge to reflect the correct coolant (not CHT) temperature limits.
\n– the sensor screw must be sealed with Loctite as the sensor\u00a0is now immersed in coolant; the earlier CHT probe fitted into a dry void in the cylinder head.
\n– the cylinder head bolts must\u00a0be torqued to a different value from\u00a0the old ones, and also in a different order.<\/p>\n

You can access detailed information about these cylinder heads in at least three places:
\n(a) Rotax Service instruction SI-912-020
\n<\/a>(b) Rotax Line Maintenance Manual\u00a0temporary update
\n<\/a>(c) ‘Rotax Minute’ video<\/a>, which briefly describes to differences between old and new design cylinder heads (may be Rotax can change that awful voice over??)<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

In 2013, Rotax introduced (without much of a fanfare) a new design of cylinder head for their 912 carburettor series engines.\u00a0These cylinder heads have been\u00a0fitted to all new engines since then and may be retrofitted to earlier engines. Having received … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[18,318,839,845,1059],"_links":{"self":[{"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=\/wp\/v2\/posts\/1673"}],"collection":[{"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1673"}],"version-history":[{"count":0,"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=\/wp\/v2\/posts\/1673\/revisions"}],"wp:attachment":[{"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/foxbatpilot.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}