Deere 1

Thanks

I have a 1990 mack ch613 with a e6 300 mack engine in it. it recently ran off and bent exhaust valves and pushrods. I had the heads fixed and got new pushrods. when I went to adjust valves, I did it according to the timing marks on the dampner. They adjusted out fine, but i did notice that while adjusting other cyl, the exhaust side of the cyl. I already adjusted would have too much clearance in them at a certain point. The intake valves however, are fine at all points after adjusting. the bridges on the valves are adjusted correctly, and the adjusters on the rockers are all even. the engine does not have an exhaust brake. the lifters all look to be fine. Every time i bring it back to the correct adjusting position on the dampner, the clearance is fine. .016 intake and .024 exhaust. The truck does seem to run fine. I have not driven it down the road yet, but it revs fine in the shop so far. Could the cam timing be off causing this, or is this normal?

Thanks for the bolt info. It does raise a couple more questions for me though. Have you guys had any luck putting used head bolts on and are the torque values and pattern the same on e6 and e7 engines. I have the values for a e7 engine. Im pretty green on these mack engines and appreciate all the info!

Can anyone tell me a place to get mack parts aftermarket or a little cheaper than from the dealer? I am looking for head bolts for a 1990 ch613 with 300 mack.

Thanks, Lee

Thanks for the help

Lee

Can someone tell me the torque spec and pattern for the head bolts on a 1990 Ch613 with a 300 Mack in it?

Thanks, Lee