Check and set ignition timing against a clear degree scale with the MR. GASKET timing tab, part number 4593. It fits many Chevrolet, GMC, Buick and Oldsmobile V8 vehicles, among them the 1988-1995 Chevrolet C1500 5.0L / 5.7L. Engine codes across the listed vehicles are V8-4.3L, V8-4.6L, V8-5.0L, V8-5.3L, V8-5.4L, V8-5.7L, V8-6.6L and V8-7.4L. See the "Vehicles it fits" section for the full list of applications.
This engine timing tab mounts at the timing cover and gives a fixed reference scale. The timing mark on the balancer is read against that scale, typically with a timing light, when checking or adjusting ignition timing.
- Installs with stock bolts: mounts using the stock timing cover bolts.
- Chrome-plated steel: makes a much better match for a chromed timing cover.
- Timing markings: the scale runs from 16 degrees before top dead center (BTDC) to 8 degrees after top dead center (ATDC).
- Balancer size: for use with an 8 in. balancer.
A timing tab may need replacing if it is bent, if its markings are worn or unreadable, or if it has gone missing after timing cover work.
Quantity per application: 1. Skin packaged. Country of origin: China.
Frequently Asked Questions
What does this timing tab do?
It gives a fixed degree scale at the timing cover. The timing mark on the balancer is read against that scale, typically with a timing light, when checking or setting ignition timing.
What timing range is marked on the Mr. Gasket 4593?
The markings run from 16 degrees before top dead center (BTDC) to 8 degrees after top dead center (ATDC).
How does it install?
It installs using the stock timing cover bolts.
What balancer size is it for?
It is made for use with an 8 in. balancer. See the "Vehicles it fits" section for the listed vehicles and engine codes.
What is it made of?
It is chrome-plated steel, which makes a much better match for a chromed timing cover.
