Hi and welcome to JA. I am Buddy,and i will try and help you out.
It is possible to turn the cam gear on some 60 series and get it a tooth or more out of time. If the thrust plate stayed in the front cover while the cam was replaced and did not fall down any, it would still be in time. If it fell , it is possible to get it out of time. You can check the timing without taking the front cover off. All you need is a dial indicator with a stationary base. What is your engine serial number and i will give you the procedure for checking and the specs.
Thanks for the reply.
I am attaching the procedure on checking cam timing for you from the manual. If you need me to explain anything or need more information just ask.
The timing should be between 5.36 mm (0.211 in.) and 6.76 mm (0.266 in.)
Here is the procedure for checking
Note: The cylinder selected must be on the compression stroke when performing this check.
Note: The spindle should be on the center line of the injector cam follower roller pin in order to get an accurate measurement of cam lift.
Are there inspection plates you can remove on the front of the engine to check for the timing marks? If any are off it will only be the cam gear. Can you check just the cam gear? It was the only one that was removed, the rest should be in place. What else could cause the horsepower issue?
Thanks for the reply. There are no inspection plates to remove to check. Only visual way to check timing is to remove the front cover. When you are checking cam timing, it is checking the cam timing compared to the rest of the timing. Almost everyone i seen that was out of time, when you had a reader or laptop hooked to truck and done a cylinder cutout test, the pw #'s will be alot higher then normal. At idle they run from around 3.5 to 4.0. The ones i have seen that was out of time would run around 5 or 6 on the pw numbers. If cam plate never fell, i would think you would still be good on timing. I would next verify correct camshaft and that the overhead was set correctly. I hope this helps you out. If you have anymore questions, just ask.
That is correct on the injector setting and the valve settings. The cam should have a part number that start off with 2351 or something very similiar.
Here is the part number i came up with. R23521681. I am not a parts guy, so i cant cross that number you gave me. If you call your local freightliner or detroit deisel dealer, they can verify part number for you.
Mine is 2352 1680 I am told that the 1680 is the casting # XXXXX the 1681
I quess I have a timing issue since everything else checks out. Thanks MO
Thanks for the accept. It does not take long at all to check timing. If that was good, i would rerun the overhead just to make sure they are all in specs.