1966 Porsche 912 Motor Bearing Kit Rebuild Parts: A Complete Guide

Restoring a 1966 Porsche 912 engine requires careful selection of quality parts. The motor bearing kit is critical—it includes main bearings, rod bearings, and often thrust washers. Getting the right set ensures proper oil clearance and long engine life. This guide covers what to look for, compatibility, and where to source reliable bearing kits for your 912 rebuild.

Understanding the 1966 Porsche 912 Engine Bearings

The 1966 Porsche 912 uses a 1.6L flat-four engine derived from the 356. Its bearings are similar to early 911 units but with specific dimensions. The bearing set typically consists of:

• Main bearings (5 sets for the crankshaft)
• Rod bearings (4 sets for the connecting rods)
• Thrust washers (for crankshaft end play)

Material and Standards

Original bearings were tri-metal (steel-backed, copper-lead, and a lead-tin overlay). Quality aftermarket bearings use similar materials. Look for brands like Glyco, Mahle, or Kolbenschmidt (OEM suppliers). Avoid cheap no-name bearings—they may fail prematurely.

OEM vs. Aftermarket Bearing Kits

OEM Porsche Bearings

Pros: Exact fit, known quality, correct metallurgy. Cons: Higher cost, sometimes difficult to find. Part numbers for 1966 912 include 616.101.201.00 (main bearing set) and 616.101.202.00 (rod bearing set). However, Porsche has superseded many of these with later part numbers.

Aftermarket Bearings

Many reputable manufacturers produce bearing sets for the 912. Glyco (Federal-Mogul) offers sets under part numbers H1160/5 (main) and H1165/4 (rod). Mahle also makes high-quality ones. These are often identical to OEM but at a lower price.

Key: Ensure the bearing set matches the 1966 912’s specific crank journal sizes. Early 912 cranks may have slight variations. Always measure journal diameters and plastigauge clearance during assembly.

What’s Included in a Typical Bearing Kit?

A complete motor bearing kit for 1966 912 should include:

• 5 main bearing shells (upper and lower halves)
• 4 rod bearing shells (upper and lower)
• 2 thrust washers (upper and lower)
• Sometimes a camshaft bearing set (if included)

Check kit descriptions: Some kits are “engine bearing sets” that include cam bearings; others are just crank bearings. Verify before buying.

Compatibility Notes

The 1966 model year is the first for the 912. Some parts interchange with early 1965 911 but not all. Key differences:

• Main bearing width: 1966 912 uses narrower main bearings than later 2.0L engines.
• Rod journals: 56mm diameter, same as 356C and early 911.
• Thrust bearing location: #3 main (center).

If you have a later crankshaft (e.g., from a 1969 912E), it may require different bearings. Always verify by measuring.

How to Choose the Right Bearing Kit

1. Determine Bearing Clearance Grade

OEM bearings come in standard and undersize (to match reground cranks). Common undersizes:

• Standard (blue/red codes)
• 0.25mm undersize
• 0.50mm undersize

For a rebuild, if your crank is within spec, use standard. If it’s been turned, order the correct undersize.

2. Check Brand Reputation

Stick with established brands:

• Glyco – Most common aftermarket; good quality
• Mahle – Premium; often used in racing
• King Bearings – Lower cost but acceptable
• Clevite – Rare for Porsche but sometimes available

Avoid unbranded or “Porsche replica” bearings from unknown sources.

3. Confirm Part Numbers

Cross reference factory numbers with aftermarket:

• Main set: OEM 616.101.201.00 = Glyco H1160/5
• Rod set: OEM 616.101.202.00 = Glyco H1165/4

Verify with your engine’s serial number or measurements.

Installation Tips

• Clean all oil passages thoroughly.
• Measure bearing bore with case torqued.
• Plastigauge each bearing—clearance should be 0.0015” to 0.0025” for mains, 0.001” to 0.002” for rods.
• Use assembly lube on bearing surfaces.
• Torque main bearing bolts and rod bolts to spec (not given here—refer to shop manual).

Where to Buy

Specialty Porsche restoration suppliers like Sierra Madre Collection, Stoddard, or Pelican Parts offer bearing kits. Also check with engine builders and online forums. Always buy from a source that guarantees fitment for 1966 912.

Common Mistakes

• Mixing rod and main bearings.
• Using bearings for a later 911 (wider mains may not fit).
• Not checking for proper crush height.
• Skipping plastigauge—russian roulette.

Final Recommendation

For a 1966 Porsche 912 motor rebuild, choose a Glyco main bearing set (H1160/5) and rod set (H1165/4) in standard size if your crankshaft is unground. These match the original specs and are affordable. If you want a single kit, look for a bundled “912 engine bearing kit” that includes both sets and thrust washers. Always measure clearance—it’s the best $10 insurance you can buy.

A rebuild is a big investment. Using the correct bearing kit from a reputable brand will keep your 912 running smoothly for another 50 years.