Owner's Manual Maintenance Schedule</title<link href="/diplomat.css" rel="stylesheet" type="text/css"> </head> <body><div id="content"> <table border="0" cellpadding="6" bgcolor="#99CCFF" align="center"> <tr class="menus"> <th><a href="/index.html">Home</a></th> <th><a href="/info/index.html">Diplomat Info</a></th> <th><a href="/registry/index.html">Registry</a></th> <th><a href="/upgrade/index.html"> Upgrades</a></th> <th><a href="/photo/index.html">Photos</a></th> <th><a href="/links.html">Links</a></th> <th><a href="/farley/index.html">Farley</a></th><th><a href="/tools/index.html">Site Tools</a></th> <th><a href="/svcman/index.html">Manual</a></th> <th><a href="https://www.dippy.org/forum2/">Forum</a></th> </tr> </table> <p> </p> <p align="center"><img src="/graphic/site/diplomat-cars.jpg" alt="Dodge Diplomat cars banner" width="792" height="77"></p> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-7865546952023728" data-ad-format="auto"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <table border="0" cellpadding="2" width="800"> <tr> <td width="175"> <style type="text/css"> @import url(http://www.google.com/cse/api/branding.css); </style> <div class="cse-branding-right" style="background-color:#000000;color:#FFFFFF"> <div class="cse-branding-form"> <form action="https://www.dippy.org/search-results.php" id="cse-search-box"> <div> <input type="hidden" name="cx" value="partner-pub-7865546952023728:5994239894" /> <input type="hidden" name="cof" value="FORID:10" /> <input type="hidden" name="ie" value="ISO-8859-1" /> <input type="text" name="q" size="31" /> <input type="submit" name="sa" value="Search" /> </div> </form> </div> <div class="cse-branding-logo"> <img src="http://www.google.com/images/poweredby_transparent/poweredby_000000.gif" alt="Google" /> </div> <div class="cse-branding-text"> Custom Search </div> </div> </td> <td width="250"><table border="1" cellspacing="1" width="100%" bgcolor="#52ABD6"> <tr> <td width="25%" bgcolor="#000000"> <p align="center"><font size="2"><a href="../index.html"><b>HOME</b></a><br> <nobr><a href="dipmschm.html">Next</a></nobr><br><a href="../tools/whatsnew.html">New</a><br> <a href="../tools/sitemap.html">Map</a></font></td> <td width="75" bgcolor="#000000"><font size="2"><nobr><a href="dipmsch.html">Up</a></nobr><br><nobr>Owner's Manual Maintenance Schedule</nobr><br><nobr><a href="dipmschm.html">Service Manual Maintenance Schedule</a></nobr><br><nobr><a href="dipmschh.html">Haynes Guide Maintenance Schedule</a></nobr> </font></td> </tr> </table></td> <td width="375"><table border="1" cellspacing="1" width="100%" bgcolor="#52ABD6"> <tr> <td bgcolor="#000000"> <table border="0" cellpadding="3" cellspacing="1" width="100%"> <tr> <td width="10%"><font size="2"><img src="../graphic/site/smallhood.gif" alt="smallhood.gif (1323 bytes)" width="30" height="45"></font></td> <td width="90%"><font face="Arial"><font color="#999999" size="1">www.dippy.org</font><br><strong><font color="#FFFFFF" size="3">Owner's Manual Maintenance Schedule</font></strong></font></td> </tr> </table> </td> </tr> </table></td> </table> </td></tr></table> </td><td valign="top" width="24"></td><td valign="top"> <p> </p> <p><font size="2"><b>This schedule is from the 1979 Dodge Diplomat/Magnum Owner's Manual. See bottom of page for Severe Service schedule items.</b></font></p> <p><font size="2"><b>Every 7,500 miles (12,000 km)</b><br> Apply solvent to carburetor choke shaft (or every six months)<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Change engine oil (or every 12 months)<br> Replace engine oil filter (or every 12 months)<br> Check and adjust clutch pedal free play as required</font></p> <p><font size="2"><b>Every 15,000 miles (24,000 km)</b><br> Apply solvent to carburetor choke shaft (or every six months)<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Check and adjust idle speed and air-fuel mixture as required<br> Replace oxygen sensor<br> Check operation of positive crankcase vent valve, replace if necessary<br> Replace spark plugs (without catalytic converter)<br> Check and adjust tappet adjustment as required (six cylinder engines)<br> Inspect all fuel system & underhood rubber and plastic components (emissions hoses) and replace if necessary<br> Change engine oil (or every 12 months)<br> Check and service cooling system (or every 12 months)<br> Check condition and tension of drive belts<br> Check and adjust clutch pedal free play as required</font></p> <p><font size="2"><b>Every 22,500 miles (36,000 km)</b><br> Apply solvent to carburetor choke shaft (or every six months)<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Change engine oil (or every 12 months)<br> Replace engine oil filter (or every 12 months)<br> Check and adjust clutch pedal free play as required</font></p> <p><font size="2"><b>Every 30,000 miles (48,000 km)</b><br> Check and adjust automatic choke as required<br> Apply solvent to carburetor choke shaft (or every six months)<br> Replace carburetor air filter<br> Clean crankcase inlet filter<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Replace fuel filter<br> Check and adjust idle speed and air-fuel mixture as required<br> Apply solvent to manifold heat control valve<br> Replace oxygen sensor<br> Replace positive crankcase vent valve<br> Replace spark plugs (with or without catalytic converter)<br> Check and adjust tappet adjustment as required (six cylinder engines)<br> Inspect all fuel system & underhood rubber and plastic components (emissions hoses) and replace if necessary<br> Replace vapor storage canister filter element<br> Change engine oil (or every 12 months)<br> Check and service cooling system (or every 12 months)<br> Drain, flush and refill cooling system at 24 months, and every 12 months thereafter<br> Check condition and tension of drive belts<br> Inspect brake linings<br> Inspect front wheel bearings<br> Lubricate ball joints and tie rod ends<br> Check and adjust clutch pedal free play as required</font></p> <p><font size="2"><b>Every 37,500 miles (60,000 km)</b><br> Apply solvent to carburetor choke shaft (or every six months)<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Check operation of positive crankcase vent valve, replace if necessary<br> Change engine oil (or every 12 months)<br> Replace engine oil filter (or every 12 months)<br> Check and adjust clutch pedal free play as required</font></p> <p><font size="2"><b>Every 45,000 miles (72,000 km)</b><br> Apply solvent to carburetor choke shaft (or every six months)<br> Apply solvent to fast idle cam and pivot pin (or every six months)<br> Check and adjust idle speed and air-fuel mixture as required<br> Replace oxygen sensor<br> Replace spark plugs (without catalytic converter)<br> Check and adjust tappet adjustment as required (six cylinder engines)<br> Inspect all fuel system & underhood rubber and plastic components (emissions hoses) and replace if necessary<br> Change engine oil (or every 12 months)<br> Check and service cooling system (or every 12 months)<br> Drain, flush and refill cooling system at 24 months, and every 12 months thereafter<br> Check condition and tension of drive belts<br> Check and adjust clutch pedal free play as required</font></p> <p> </p> <p><font size="2"><b>SEVERE SCHEDULE<br> </b>For trailer towing, taxi, police and limousine vehicles</font></p> <p><font size="2"><b>Engine Oil</b><br> Change every 3 months or 3,000 miles (4,800 km)<br> <b>Engine Oil Filter</b><br> Replace at initial oil change and r\every other oil change thereafter<br> <b>Transmission Fluid</b><br> Change automatic every 15,000 miles (24,000 km), change filter, adjust bands<br> Change manual every 30,000 miles (48,000 km)<br> <b>Axle Oil</b><br> Change every 36,000 miles (58,000 km)<br> <b>Front Wheel Bearings</b><br> Inspect and lubricate every time drums or rotors are removed for service or inspection, and every 9,000 miles (14,000 km)<br> <b>Brake Linings</b><br> Inspect every 9,000 miles (14,000 km)<br> <b>Ball Joints and Tie Rod Ends</b><br> Lubricate every 18 months or 15,000 miles (24,000 km)<br> <b>Universal Joints</b><br> Inspect at every oil change<br> </font></td><td valign="top" width="24"></td><td valign="top" width="1%"> <table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td> </td> </tr> <tr> <td width="250"><table border="1" cellspacing="1" width="100%" bgcolor="#52ABD6"> <tr> <td width="25%" bgcolor="#000000"> <p align="center"><font size="2"><a href="../index.html"><b>HOME</b></a><br> <nobr><a href="dipmschm.html">Next</a></nobr><br><a href="../tools/whatsnew.html">New</a><br> <a href="../tools/sitemap.html">Map</a></font></td> <td width="75" bgcolor="#000000"><font size="2"><nobr><a href="dipmsch.html">Up</a></nobr><br><nobr>Owner's Manual Maintenance Schedule</nobr><br><nobr><a href="dipmschm.html">Service Manual Maintenance Schedule</a></nobr><br><nobr><a href="dipmschh.html">Haynes Guide Maintenance Schedule</a></nobr> </font></td> </tr> </table></td> <td width="375"><div style="text-align:center;"> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins 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