Radiator for water coolant fluid. Porsche 996 Turbo / 996 C4S / 997 Turbo  ❭  99610613

This OE Match coolant radiator is suitable for selected Porsche 996 C4S, Turbo and GT2 models, together with applicable 997 Turbo, GT2 and GT2 RS variants. Separate OE references identify the left- and right-hand radiators, so the required position must be confirmed before ordering.

Fits:
Porsche 996 Turbo / GT2 / C4S 1998 - 2005
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 Turbo 2010 - 2013

Diagram ref no 1


What This Product Does

The radiator transfers heat from the circulating engine coolant to the surrounding airflow. This helps the water-cooling system regulate engine temperature during normal driving, low-speed operation and higher engine loads.

Functions

• Releases heat carried by the engine coolant.
• Supports stable coolant and engine operating temperatures.
• Works with the radiator fan and air guide to provide cooling airflow.
• Maintains coolant circulation through the front cooling assembly.
• Provides a replacement for a leaking, blocked or physically damaged radiator.

Technical Details

• OE reference 99610613174: left-hand radiator.
• OE reference 99610613272: right-hand radiator.
• Verified applications include 996 C4S and Turbo, 997.1 Turbo and GT2 with M97.70 engine, 997.2 Turbo 3.8L and 997.2 GT2 RS 3.6L.
• The radiator fan, air guide, supports, hoses and mounting components form part of the surrounding cooling assembly and should be inspected separately.
• Diagram Ref No 1.

Symptoms of Fault

• Coolant staining or dampness around the radiator core or end-tank seams.
• A sweet coolant smell or puddles beneath the front of the vehicle.
• Repeated low-coolant warnings or an unexplained drop in coolant level.
• Rising temperature in traffic, under load or at motorway speeds.
• Cooling fans operating more frequently than expected.
• Corroded, blocked, bent or damaged radiator fins.
• Coolant residue collecting on the front undertrays.
• Gurgling after shutdown where air has entered the cooling system.

Why Replacement Matters

A leaking or restricted radiator reduces the system’s ability to remove heat from the coolant. Continued coolant loss can introduce air into the system and lead to unstable operating temperatures. Replacement restores the integrity of the affected cooling circuit, while inspection of the hoses, joints, fan and mounting hardware can identify related age or impact damage.

FAQs

• Are the left and right radiators interchangeable?
  No. Each side has a separate OE reference, so confirm the required position against the vehicle and existing component.
• Can a radiator be restricted without leaking?
  Yes. Internal deposits or external debris between the fins can reduce heat transfer without producing a visible coolant leak.
• How can a radiator leak be distinguished from a hose leak?
  Radiator faults commonly leave residue around the core or end-tank seams, while hose leaks tend to appear around connections. A cooling-system pressure test can help locate the source.
• Should the hoses be checked during replacement?
  Yes. Inspect nearby hoses, clamps, seals and mountings for ageing, cracking or coolant residue before reassembly.
• Why can overheating be more noticeable in traffic?
  Natural airflow is reduced at low speed, increasing reliance on the radiator core and electric cooling fan.