Many of you do not have access to, or have confidence in a repair facility in your immediate area. As a result, we have seen a remarkable number of you doing something you once thought impossible, working on your own ZR1. We highly recommend the purchase of the appropriate service manual which will usually assist you in performing the basic repair procedures you might attempt. Be sure to carefully read ALL of the procedure before beginning especially any notices or warnings.

Although intimidating at first glance, the LT5 engine is really a somewhat technically friendly design. The plenum can be removed by a novice in less than an hour (be sure to first drain the coolant prior to plenum removal). Physically attached to the plenum's underside, you will find four electrical connections leading to the ignition module. It is highly advised that these be treated with care as they can be damaged and can lead to a host of secondary problems.

On the top of the LT5 engine, you will find the AC compressor, alternator, injectors, ignition coils, spark plug wires, coolant sensors, numerous vacuum lines and fittings related to the secondary throttle system, and of course, deep within the valley, the starter.


Helpful hint: So you're broken down on the side of the road and need emergency access under the plenum? Maybe need to tighten a cam cover? In an emergency, you should know that your targa top ratchet is the same size Torx tool as many fasteners on the LT5 engine including the plenum and camcover screws.


Remember, this is just in case of an emergency.

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