3856961 Thermostat Kit 160F for Volvo Penta OMC 4.3 5.0 5.7 5.8 L V6 V8 Marine Engine — Germany Local Warehouse
3856961 Thermostat Kit 160F for Volvo Penta OMC 4.3 5.0 5.7 5.8 L V6 V8 Marine Engine — Germany Local Warehouse
Product Overview
Thermostat kit opening at 160 °F (71 °C) for Volvo Penta and OMC 4.3, 5.0, 5.7 and 5.8 L V6 and V8 marine engines, packed at 150 x 100 x 50 mm. It replaces Volvo Penta 3856961, 3852216 and 383307 (listed as 0383307), plus OMC 379754, and crosses to Sierra 18-3677, GLM 13060 and Mallory 9-43021 and 43021. Shipped from our Germany local warehouse.
The kit ships with the thermostat, its O-ring and its housing gasket, so the housing can be resealed in one go instead of hunting three separate numbers. These GM and Ford based blocks use the 160 °F thermostat because they run raw water through the manifold, and the cooler setting keeps the engine from heat soaking the exhaust after a long run at cruise.
It fits the V6 and V8 range only. The four cylinder engines take a different housing and a different thermostat, and that mistake shows up as a leak at the cover rather than an overheat.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Thermostat kit |
| Opening Temperature | 160 °F (71 °C) |
| Engine Family | Volvo Penta and OMC 4.3 / 5.0 / 5.7 / 5.8 L V6 and V8 |
| Cylinders | V6 and V8 only, not for 4 cylinder engines |
| Kit Components | Thermostat, O-ring, housing gasket |
| Country of Manufacture | Taiwan |
| Packaging Size | 150 x 100 x 50 mm (5.9 x 3.9 x 2.0 in) |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Volvo Penta | 3856961 |
| Volvo Penta | 3852216 |
| Volvo Penta | 383307, also listed as 0383307 |
| OMC | 379754 |
| Sierra | 18-3677 |
| GLM | 13060 |
| Mallory | 9-43021, 43021 |
Compatible Engines
| Displacement | Layout | Volvo Penta Designations | OMC Model Codes |
|---|---|---|---|
| 4.3 L | V6 | 4.3GL, 4.3GS, 4.3Gi | 43FBPBYC, 432BPBYC, 434BPBYC |
| 5.0 L | V8 | 5.0FL, 5.0Fi | 50FBPBYC, 502BPBYC |
| 5.7 L | V8 | 5.7GL, 5.7Gi | 57FCPBYC, 57FCPBYD, 572BPBYC |
| 5.8 L | V8 | 5.8FL, 5.8Fi, 5.8FSi | Ford based, no OMC code listed |
Model Year Coverage
| Engine | Model Year Range |
|---|---|
| 4.3 L, all models | 1993-2000 |
| 4.3 L A, B | 2001-2002 |
| 5.0 L FiP, FLP | 1993-1996 |
| 5.0 L GiP, GLP | 1997-2000 |
| 5.0 L GL, GXi, OSi (A, B) | 2001-2003 |
| 5.7 L, all models | 1993-2000 |
| 5.7 L, all except OSi | 2001-2003 |
| 5.8 L, all models | 1993-1996 |
What's Included
| Component | Qty | Note |
|---|---|---|
| Thermostat, 160 °F (71 °C) | 1 | 3856961 / 3852216 / 383307 |
| Thermostat O-ring | 1 | Supplied in the kit |
| Thermostat housing gasket | 1 | Supplied in the kit |
Stuck Open or Stuck Closed
| Symptom | Thermostat State | What You Notice |
|---|---|---|
| Gauge never reaches normal | Stuck open | Cold running, rich mixture, high fuel use |
| Gauge climbs fast under load | Stuck closed | Overheat within minutes, risers cook |
| Gauge swings up and down | Sticking part open | Uneven temperature, poor idle |
| Overheats only at speed | Not the thermostat | Check the impeller and the intake |
| Runs cold after winter lay-up | Stuck open after storage | Corrosion on the seat over the winter |
| Cover leaking after a change | Old gasket reused | Clean the face and fit the new gasket |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Drain the cooling system below the housing level |
| 2 | Test the old thermostat in a pan of water before replacing it |
| 3 | Note the fitted orientation, the bleed hole goes to the top |
| 4 | Clean the old gasket face down to bare metal |
| 5 | Fit the new thermostat with the new O-ring and gasket |
| 6 | Torque the housing bolts evenly and in stages, the cover is thin |
| 7 | Refill and run up to temperature with the cap off to bleed |
| 8 | Watch the gauge reach and hold its normal mark on the water |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from Germany
| Destination | Warehouse | Note |
|---|---|---|
| Germany | Germany local warehouse | Domestic delivery, no import duty |
| Austria, Netherlands, Belgium | Germany local warehouse | EU intra-community delivery |
| France, Italy, Spain, Poland | Germany local warehouse | EU intra-community delivery |
Before You Buy
- Check the cover plate or the engine tag, the 4.3, 5.0, 5.7 and 5.8 L V6 and V8 take this kit, the four cylinder engines do not
- Match the housing shape before ordering, later 5.0 and 5.7 models changed to a different cover
- Clean the old gasket face down to bare metal, leftover gasket causes the leak
- Torque the housing bolts evenly and in stages, these covers warp easily
- This is the thermostat, O-ring and gasket, the housing is not included
- 30-Day Easy Returns
- Ships from our Germany local warehouse
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