Thread: General Hemi Info Part 5

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Timing Chains and covers:

A few years ago you could still by the original style wide timing chains for the early Chrysler Hemi’s (which I am using on the 331) but I don’t know if they are still available. Fortunately these engines can use Small Block (LA) style timing chain sets. The 354 is getting a double roller set. As they can use the timing chain sets, I also suspect that a SB MOPAR gear drive could also be installed if you are so inclined.

For the timing chain cover you have a couple of options. If you use the short BB Chevy water pump your pretty much have to use the shallow aftermarket timing cover. Besides the recessed cam bolt, you also have to flatten the oil slinger in order for it not to rub on the inside of the timing cover, and you cannot use a fuel pump eccentric with it. It will provide a bit more engine clearance through.

If you going with a long BB Chevy water pump you can use the stock timing cover (and have a fuel pump eccentric if desired). If you can use this style pump you may be better off in the long run. Besides not having to have the special timing cover, the long pump is more common (and cheaper) and in smaller towns the long pumps are generally stocked on the shelves of most part stores as opposed to having to special order the short pumps. The availability of the long pumps can lead to a lot of piece of mind if you take your Hemi on a long road trip (unless you plan ahead and throw a spare pump in the trunk (like I’ll be doing when I go to Tulsa).