{"id":448,"date":"2026-09-28T11:59:09","date_gmt":"2026-09-28T11:59:09","guid":{"rendered":"https:\/\/stepgradesmotor.com\/product\/1984-mack-em6-300-turbo-diesel-engine\/"},"modified":"2026-09-29T20:30:56","modified_gmt":"2026-09-29T20:30:56","slug":"1984-mack-em6-300-turbo-diesel-engine","status":"publish","type":"product","link":"https:\/\/stepgradesmotor.com\/pl\/product\/1984-mack-em6-300-turbo-diesel-engine\/","title":{"rendered":"1984 Mack EM6-300 Turbo Diesel Engine"},"content":{"rendered":"<p>1991 (REMAN) 1984 (ORIGINAL MODEL YEAR) Mack EM6-300 diesel truck engine, 300 HP rating, Maxidyne torque setting, mechanical fuel system, charge air cooled, manual transmission, as pictured. May interchange w\/ some E6-300 series engines and others.<\/p>\n<p>TEST RAN CLEAN, 80 LBS OIL PRESSURE AT IDLE, 100 LBS AT MID\/FULL THROTTLE. NO SMOKE OR BLOWBY OBSERVED DURING COLD TEST RUN.<\/p>\n<p>HARD TO FIND ENGINE AND A CLEAN RUNNER &#8212; IF YOU NEED ONE, BUY THIS ONE!<\/p>\n<p>Specifications<\/p>\n<p>Manufacturer<br \/>\nMack<\/p>\n<p>Model<br \/>\nEM6-300<\/p>\n<p>Year<br \/>\n1984<\/p>\n<p>Stan<br \/>\nUsed<\/p>\n<p>Stock Number<br \/>\n18471<\/p>","protected":false},"excerpt":{"rendered":"<p>Genuine imported 1984 Mack EM6-300 Turbo Diesel Engine \u2014 an inspected, quality-checked truck engine from Stepgrades Motor, ready to ship UK-wide with fast dispatch and our quality guarantee.<\/p>","protected":false},"featured_media":2827,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[20],"product_tag":[],"class_list":["post-448","product","type-product","status-publish","has-post-thumbnail","product_cat-truck-engines","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/product\/448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/comments?post=448"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/media\/2827"}],"wp:attachment":[{"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/media?parent=448"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/product_brand?post=448"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/product_cat?post=448"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/stepgradesmotor.com\/pl\/wp-json\/wp\/v2\/product_tag?post=448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}