Vacuum pump for 4-cylinder diesel engine with 2 valves per cylinder:
1. Double pump (vacuum pump combined with a fuel pump)
2. Vacuum hose to the brake booster with a check valve
3. Fuel line
4. Fuel line
Vacuum pump for 4-cylinder diesel engine with 4 valves per cylinder:
1. Vacuum hose connection to the brake booster
2. Fuel line
3. Fuel line
4. Double pump (vacuum pump combined with a fuel pump)
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