SKU: M77MPG1-12
UPC: 027067625755
MPN: M77MPG1
Plastigage is the no-guesswork way to verify rod and main bearing clearance during an engine build, and this MAHLE ORIGINAL/CLEVITE green strip covers the .001in to .003in range that handles most performance and rebuild work. Engine builders lay a strip across the journal, torque the cap, then read the crushed width against the supplied scale to get clearance in thousandths. No micrometers, no telescoping gauges, no math. This is the green-grade strip (Clevite M77MPG1-12), sold here as a 12-pack so you have enough material to check every journal on a V8 in a single session.
Each strip reads clearances from .001in through .003in, which matches the spec window for a lot of small-block and big-block bearing setups. You place a length of the soft plastic thread along the bearing surface, install and torque the cap to spec, then remove it and compare the flattened strip to the printed gauge on the package. The wider the crush, the tighter the clearance. Because the material deforms predictably, the read is direct and repeatable without instruments that need calibration. The 12-count pack (SKU M77MPG1-12) gives you redundancy for re-checks and odd journal counts. Keep it alongside your other measurement tools so it's on the bench when the crank goes in.
Reach for this green Plastigage when you're setting bearing clearance on a fresh rebuild, diagnosing wear in a high-mileage engine, or confirming a machine shop's numbers before final assembly. If your target clearance runs wider than .003in, step up to the red-grade strips instead. Builders who keep their bench stocked tend to pair this with a dial indicator and a feeler gauge for the rest of the assembly checks. Browse the full engine tools selection for the supporting gear that rounds out a bearing job.
The green-grade strip reads bearing clearance from .001in to .003in. That range covers the spec window for many small-block and big-block rod and main bearing setups. If your target clearance runs wider, the red-grade strips handle .002in to .006in instead.
Lay a strip across the clean bearing journal, install the cap, and torque it to spec. Remove the cap without rotating the crank, then compare the flattened strip to the printed scale on the package. A wider crush means tighter clearance. Read the matching number directly in thousandths.
This Clevite part ships as a 12-pack, which gives you enough material to check every journal on a V8 in one session plus extras for re-checks. SKU M77MPG1-12 reflects the 12-count quantity.
No. The soft plastic thread deforms predictably under torque, so you read clearance by comparing the crushed width to the printed gauge on the package. There's no micrometer, no calibration, and no math required to get a usable number.
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