Product Description
MAHLE CS4068 lower engine (conversion) gasket set delivers OE-grade sealing for the bottom end of your 1989–1998 5.9L Cummins 12-valve (VIN D). Built with MAHLE/Clevite materials for long service life, CS4068 covers the critical leak points—oil pan, rear main housing, timing/front cover, and water pump outlets—so your 12V reseal is clean, durable, and ready to work.
Fitment
- Engine: 1989–1998 Dodge/Ram 2500 & 3500 with 5.9L Cummins 12-valve (VIN D).
- What it covers: Oil pan gasket, rear main housing/cover gasket, timing/front cover gasket & seal, water pump & outlet gaskets, and related lower-end seals (contents vary by build; see service manual for exact use).
Cross-Reference / Related MAHLE Items (Internal links only)
- MAHLE HS4068 Upper Head Gasket Set (STD) – 1989–1998 5.9L
- MAHLE OS32139 Oil Pan Gasket – 1989–2002 5.9L
- MAHLE JV1622 Rear Main Seal Gasket Set – 1989–2002 5.9L
- MAHLE JV5072 Timing Cover Gasket Set – 1994–1998 5.9L (12V)
- MAHLE 48383 Front Crank/Timing Cover Seal w/ Wear Sleeve – 1989–2018
- MAHLE 67857 Rear Main Crankshaft Seal (w/ Sleeve) – 1989–2018
Why MAHLE / Clevite
- Application-engineered materials matched to Cummins sealing surfaces
- OE fit simplifies clean, leak-free installs
- Trusted choice for stock refreshes, tow rigs, and work trucks
Install Tips
- Degrease sealing surfaces; check straightedges and fastener torque per Cummins spec
- Align timing cover & oil pan rails; verify crank seal depth/square to snout
- Pair with HS4068 for a complete top + bottom reseal on 12V builds
FAQ
What does “lower engine / conversion set” include?
It targets bottom-end leak points: oil pan, rear main housing, timing/front cover, water pump outlets, and related seals (kit contents may vary by revision).
Will CS4068 fit my 24-valve (1998.5–2002)?
No—CS4068 is for 12-valve (1989–1998). For 24V, use the correct Mahle set for your year; timing/front cover patterns differ.
Do I still need an upper set?
Yes, for a full reseal add MAHLE HS4068 (upper) with the correct head gasket thickness. CS4068 covers the lower end only.
Specifications for Mahle CS4068
| Attribute | Value |
|---|---|
| Brand | MAHLE / Clevite |
| Part Number | CS4068 |
| UPC / GTIN | 00757522711326 |
| Engine Compatibility | 1989–1998 Dodge/Ram 2500/3500, 5.9L Cummins 12-valve (VIN D) |
| Shipping Info | Ships from CPP Diesel; shipping calculated at checkout. Typical pkg dims found on site; standard ground eligible. |
| Prop 65 | This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm. See www.P65Warnings.ca.gov. |
