MAHLE HS3678 HEAD SET 82-93 GM DIESEL

Product Description

Refresh top-end sealing on your classic GM IDI with the MAHLE HS3678 HEAD SET for 1982–1993 6.2L/6.5L diesel applications. This OE-quality kit includes the critical upper-engine gaskets and seals needed when removing cylinder heads—engineered for reliable compression sealing, clean fluid passages, and long service life on work trucks, restorations, and overland builds.

Mahle HS3678 head set, GM 6.2L 6.5L head gasket kit, 1982-1993 Chevy GMC diesel gaskets, GM IDI V8 head gaskets, CPP Diesel Mahle HS3678, upper engine gasket set GM 6.2 6.5, Mahle Original HS3678 GTIN 725975324462, GM 12516165 14067685 cross reference

Fitment

• 1982–1993 Chevrolet & GMC trucks/SUVs with 6.2L or 6.5L IDI diesel
• 1992–1993 AM General Hummer (H1) with 6.2L/6.5L IDI diesel

Cross-Reference / Alternatives (Mahle on CPP Diesel only)

• MAHLE HS4021 – 1994–1998 GM 6.5L (Standard Output)
• MAHLE HS4021A – 1992–2000 GM 6.5L
• MAHLE JV1134 – Timing Cover Gasket Set (82–02 6.2L/6.5L)
• MAHLE JV971 – Timing Cover Gasket Set (82–02 6.2L/6.5L)
• MAHLE 46467 – Engine Timing Cover Seal (82–02 6.2L/6.5L)

Helpful Notes

Head bolts/studs are not included. Inspect block and head surfaces, check flatness, and follow torque-to-yield/fastener replacement guidelines as specified for your engine. Clean threads and chase as needed.

FAQ

Will HS3678 fit both 6.2L and 6.5L IDI engines?

Yes—this set covers early GM IDI platforms in the 1982–1993 model years, including 6.2L and 6.5L applications.

Does this kit include head bolts or studs?

No. Reuse only if within specification or upgrade to new hardware during reassembly.

What gasket materials are used?

Composite head gaskets with paper/composite intake and exhaust gaskets engineered to OE sealing standards.

Specifications for Mahle HS3678