Bliue dm Posted December 9 Share Posted December 9 Ok. Here we go. Rocker arm broke where the shaft goes thru it. No bent push rod. It seems to have broke at idle. The truck has over 700k on it. The keepers seem to be in great shape as if heads where redone. I'm wondering if there is another issue that cause rocket arm to break. Driver doesn't rev high ( actually he is very easy on truck) and not heavy on Jake brake. It was the exhaust rocker that broke. Is there anything else I should be looking for. There was a lot of banging noise and I can't see what was hitting what after removing Jake head and rocker shaft. I drained oil only to find 2 or 3 small flat pieces of metal. With 700k on bottom end I don't know if I should be alarmed with that I've seen worst in oil. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/ Share on other sites More sharing options...
Geoff Weeks Posted December 9 Share Posted December 9 If it is yours and you are doing the work yourself, there are two way you can go, You can gamble and just replace the rocker and push rod and hope for the best, or you can go conservative, and pull the head. Depend on your risk adversity. If you go the cheap way, it may do it again and worse. Inspect the rocker shaft for galling, and if any is found, suspect oiling problem on the rocker. I had one crack/break on a Cummins injector rocker. I took the gamble and replaced just the rocker and pushrod, never had any further trouble. It is a gamble. If you are being paid, the only real answer is to pull it down and get to the source as why it happened. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-563562 Share on other sites More sharing options...
Joey Mack Posted December 9 Share Posted December 9 Definitely check the shaft for gauling, common issue was the hold down bolts would loosen or break, and the plugs on the ends of the shaft would pop out and affect oil pressure. Is there anything loose in the top that may have gotten wedged in the valve spring? 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-563564 Share on other sites More sharing options...
Bliue dm Posted December 9 Author Share Posted December 9 23 minutes ago, Joey Mack said: Definitely check the shaft for gauling, common issue was the hold down bolts would loosen or break, and the plugs on the ends of the shaft would pop out and affect oil pressure. Is there anything loose in the top that may have gotten wedged in the valve spring? Not that i can see but o did notice a burnt smell up top which was weird. I took a rubber mallet and popped top of springs; everything seemed to be fine. What's gauling and how can I spot it? Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-563565 Share on other sites More sharing options...
Bliue dm Posted December 9 Author Share Posted December 9 The truck has 700k plus. Don't know if that matters. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-563566 Share on other sites More sharing options...
Joey Mack Posted December 9 Share Posted December 9 Where the rockers pivot on the shaft. Deep scratches can happen, putting the rocker in a bind. You can here them chirping at times, keep in touch.. jojo 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-563567 Share on other sites More sharing options...
Bliue dm Posted Monday at 02:14 AM Author Share Posted Monday at 02:14 AM So I decided to drop pan. Found what I was looking for 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564054 Share on other sites More sharing options...
Joey Mack Posted Monday at 10:48 AM Share Posted Monday at 10:48 AM Sorry bud. Keep in touch. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564055 Share on other sites More sharing options...
Geoff Weeks Posted Monday at 01:01 PM Share Posted Monday at 01:01 PM Well that sucks! Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564058 Share on other sites More sharing options...
Joey Mack Posted Monday at 01:24 PM Share Posted Monday at 01:24 PM What is the plan now? Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564060 Share on other sites More sharing options...
Bliue dm Posted Monday at 02:30 PM Author Share Posted Monday at 02:30 PM 1 hour ago, Joey Mack said: What is the plan now? Motor has 700k on it. I think I'm gonna due full rebuild. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564062 Share on other sites More sharing options...
Bliue dm Posted Monday at 02:32 PM Author Share Posted Monday at 02:32 PM I have the pan down so I'm gonna check a rod and main bearing to see wear. Do you guys think I should replace all lifters or just the 1? Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564063 Share on other sites More sharing options...
Joey Mack Posted Monday at 02:41 PM Share Posted Monday at 02:41 PM I would be concerned that another lifter is about to fail. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564065 Share on other sites More sharing options...
Joseph Cummings Posted Monday at 02:42 PM Share Posted Monday at 02:42 PM 9 minutes ago, Bliue dm said: Motor has 700k on it. I think I'm gonna due full rebuild. I wouldn't replace a cam without all new followers. You got the pan down already, roll rods and mains in it. Cheap insurance Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564066 Share on other sites More sharing options...
Bliue dm Posted Monday at 02:56 PM Author Share Posted Monday at 02:56 PM 11 minutes ago, Joseph Cummings said: I wouldn't replace a cam without all new followers. You got the pan down already, roll rods and mains in it. Cheap insurance I had a little more blow by than I liked. There is a few more things that I saw that was concerning. I will get you guys some more pics for your thoughts and opinions. Just figured out how to download pics. 😅 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564069 Share on other sites More sharing options...
Bliue dm Posted Monday at 02:59 PM Author Share Posted Monday at 02:59 PM 16 minutes ago, Joey Mack said: I would be concerned that another lifter is about to fail. I with you on that 1. At this point I'm leaning towards total rebuild. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564070 Share on other sites More sharing options...
Bliue dm Posted Monday at 06:07 PM Author Share Posted Monday at 06:07 PM So does anybody have suggestions on were to get parts from. PAI is talking 4300 for complete kit. Cam , lifters, front cover gasket etc. Sounds a little expensive if you ask me. I don't know any better tho. Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564078 Share on other sites More sharing options...
Joey Mack Posted Monday at 06:10 PM Share Posted Monday at 06:10 PM Is that a piston and liner kit too? Or just a cam job kit? Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564080 Share on other sites More sharing options...
Bliue dm Posted Monday at 07:15 PM Author Share Posted Monday at 07:15 PM 1 hour ago, Joey Mack said: Is that a piston and liner kit too? Or just a cam job kit? Just cam job kit Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564086 Share on other sites More sharing options...
Joey Mack Posted Monday at 07:18 PM Share Posted Monday at 07:18 PM Oh hell... Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564087 Share on other sites More sharing options...
Joseph Cummings Posted Monday at 07:38 PM Share Posted Monday at 07:38 PM 20 minutes ago, Bliue dm said: Just cam job kit That is crazy. How much does Mack want? Which E7 is this? Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564090 Share on other sites More sharing options...
Joseph Cummings Posted Monday at 07:42 PM Share Posted Monday at 07:42 PM 26 minutes ago, Bliue dm said: Just cam job kit Mack E7 Camshaft Remanufactured Reman (all #s) - $650.00 exchange and a core deposit of $300.00 https://atldiesel.com/pages/camshaft-service Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564091 Share on other sites More sharing options...
Bliue dm Posted Monday at 08:24 PM Author Share Posted Monday at 08:24 PM 45 minutes ago, Joseph Cummings said: That is crazy. How much does Mack want? Which E7 is this? It's a 2000. Non spring loaded push rods Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564094 Share on other sites More sharing options...
880joe Posted Monday at 09:32 PM Share Posted Monday at 09:32 PM Where are you located blue DM 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564100 Share on other sites More sharing options...
Joey Mack Posted Monday at 09:35 PM Share Posted Monday at 09:35 PM JC.. He has an E-Tech... A different cam then an E-7.. Not sure if you knew that .. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74845-2000-mack-e7-rocker-arm/#findComment-564103 Share on other sites More sharing options...
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