StoneandSteel
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Quick question on the advice you gave me about my ai400 cam/lifter replacement kit.
would you have a rough estimate on the time it would take to do the actual replacement with kit? I have everything removed I’m just ready to open up the front of the engine and get to the cam. Thanks- Show previous comments 12 more
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Good evening , well I’ve got the camshaft out and sure enough it’s shot. #1 and #6 lobes are scored up pretty bad. Any tricks to getting the drive gear off the end of the old cam to put it onto the new one?
forgot to ask- is there any way to line up the h-ring and tap it back in without pulling the head? The only one that’s out is on cylinder #1 and I would really rather not pull the head for just that one h ring.
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If you have an h-ring that moved, it must be replaced. You have to pull the head. Sorry ,bud but you will need the tool, and new h-rings. I usually use the smallest over sized ring. There are only 2 oversizes. I sure hope you have the book for this work. It must be followed..
Since the cam is junk, are you going to keep it and have it re- ground or just scrap it ? The gear presses off in a shop press. PO putting the gear on the new cam Must be done by the book. The gear can not pressed on or driven on. You must bake it in an oven to 450 degrees and drop it on quickly.. if you heat it with a torch it will warp.. i wish you were posting this in the forum rather than my profile..
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‘07 Mack ai400
StoneandSteel replied to StoneandSteel's topic in Modern Mack Truck General Discussion
You are correct, so any input or advice are much appreciated. Someone said that the E7 and the ai400 were actually the same engines. I only ask as I begin my search for the rebuild kit for cam and lifters. Any thoughts on this question? -
‘07 Mack ai400
StoneandSteel replied to StoneandSteel's topic in Modern Mack Truck General Discussion
Thank you for the info. I’ll get started ordering the parts and tearing her down. -
‘07 Mack ai400
StoneandSteel replied to StoneandSteel's topic in Modern Mack Truck General Discussion
Found the problem today. It’s for sure 2 bad lifters and I would expect the cam should be replaced as well. My question now is, does the engine need to come out or can I do the repair in-frame? -
‘07 Mack ai400
StoneandSteel replied to StoneandSteel's topic in Modern Mack Truck General Discussion
I followed the valve adjustment procedure per the manual and a video off of YouTube on an ai400 with a Mack mechanic. I did pull the push rods and roll them across a flat surface. They seemed fine. I’m going back into the engine today to start all over from the beginning and try it again. I’ll check all the suggestions so far. Thanks -
On my ai400 the valve bridge on cylinder #1 and #6 keeps jumping off even after doing a full valve adjustment. It will run for a few days but eventually I notice a decrease in power and a lot of white smoke which tells me the bridge came off again. I don’t see any noticeable damage to the valve springs or rocker arms. Any idea why this is happening?
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2007 Mack Granite trailer harness
StoneandSteel replied to StoneandSteel's question in Mack Truck Q & A
Thank you for the info!!! -
I’m trying to find out if there is a specific trailer wiring harness for my Mack Granite cv713? Hopefully a plug and play hookup.
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My 2007 Mack CV713 engine has AI400 and 2006 on the valve cover id tag. My question is: are the AI400 and an E7 the same engines in 2006 if you were swapping the engine assembly out? My vin number shows that I have an E7 from the Mack dealership. Any help would be appreciated.
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