b85Fireman Posted January 16, 2006 Share Posted January 16, 2006 Can someone please give me some detailed instructions on how to time an END-673. I needed to replace the gasket behind it and now need to get it back together. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/715-help-timing-on-an-end-673/ Share on other sites More sharing options...
Joe Cummings Posted January 16, 2006 Share Posted January 16, 2006 Can someone please give me some detailed instructions on how to time an END-673. I needed to replace the gasket behind it and now need to get it back together. Thanks Did you disturb the timing adjustment under that little round cover that is on the top right of the timing cover? If you just took the pump off and are putting the same pump back on you really don't have to time it if the timing is right to begin with. If you want to time it you can "flow time" it but I have to know if you have a Robert Bosch or an American Bosch injection pump. It helps if you can read the tag on the pump because the timing spec is there.Joe Quote Link to comment https://www.bigmacktrucks.com/topic/715-help-timing-on-an-end-673/#findComment-3410 Share on other sites More sharing options...
Phil Posted January 17, 2006 Share Posted January 17, 2006 Did you disturb the timing adjustment under that little round cover that is on the top right of the timing cover? If you just took the pump off and are putting the same pump back on you really don't have to time it if the timing is right to begin with. If you want to time it you can "flow time" it but I have to know if you have a Robert Bosch or an American Bosch injection pump. It helps if you can read the tag on the pump because the timing spec is there.JoeJoe, The pump has not been taken off yet. It is an American Bosch, but we can't read any spec on the tag.Phil Quote Link to comment https://www.bigmacktrucks.com/topic/715-help-timing-on-an-end-673/#findComment-3421 Share on other sites More sharing options...
Joe Cummings Posted January 17, 2006 Share Posted January 17, 2006 Joe, The pump has not been taken off yet. It is an American Bosch, but we can't read any spec on the tag.PhilI take it you are replacing the tappet cover gaskets. They are kind of acommon leak on 6 cyl macks.If you only remove and replace the pump by unbolting it at the 3 bolt flangeyou won't disturb the timing. That engine probably has the injection pumpdrive coupling with the 2 tangs and it should have a pin in it so you can'tget it 180 degrees out.The only way you can disturb the timing is by taking off the little roundcover that is located on the engine's front timing cover and losening the 4bolts that are in slotted holes.Joe Quote Link to comment https://www.bigmacktrucks.com/topic/715-help-timing-on-an-end-673/#findComment-3422 Share on other sites More sharing options...
Phil Posted January 17, 2006 Share Posted January 17, 2006 Joe,Thanks for the good advice. We will just pull that pump back a bit, replace the gasket, and bolt back on.Phil Quote Link to comment https://www.bigmacktrucks.com/topic/715-help-timing-on-an-end-673/#findComment-3423 Share on other sites More sharing options...
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