Exhaust Lower Valve Spring Retainer CATCAMS 99539/O Honda D16A9 D16Z5 1.6 16v - Each

This lower valve spring retainer from CATCAMS is sold individually. It fits the exhaust side of the Honda D16A9 / D16Z5 cylinder head.

Technical specifications

• Type: lower valve spring retainer
• Side: exhaust
• Overall diameter: 24.0 mm
• Spring seat diameter: 18.2 mm
• Inside diameter: 12.2 mm
• Overall height: 5.0 mm
• Spring seat height: 1.6 mm
• Packaging: sold individually
• Quantity required: 8 per engine, one per exhaust valve
• Reference: CATCAMS 99539/O

Engine applications

• Honda D16A9 / D16Z5 1.6 16v DOHC, 4-cylinder, 1590 cc
• Engine codes: D16A9, D16Z5

Valve train configuration specified by Cat Cams

• Upper retainer: 99412, intake and exhaust
• Intake lower retainer: 99538/O
• Exhaust lower retainer: 99539/O
• Outer spring: PAC-S90015
• Inner spring: none
• Valves, valve locks, followers and valve lash: O.E.M.

Spring specified by Cat Cams (sold separately)

• Reference: CATCAMS PAC-S90015
• Outside diameter: 25.4 mm
• Wire diameter: 3.6 mm
• Free length: 46.2 mm
• Solid length: 22.9 mm
• Fitted load: 31 kg at 37.5 mm
• Maximum load: 79 kg at 12.5 mm lift

Cat Cams fitting recommendations

• Check that the distance between valve seal and retainer is at least 0.6 mm at full lift
• Use "GOLD quality" springs for applications over 12.5 mm valve lift or 8,500 rpm

CATCAMS expertise in camshafts and their accessories (valve springs, mechanical lifters, adjustable pulleys and more) has been recognised worldwide for many years, built on craftsmanship and precise study of engines and applications. Every camshaft profile and spring rate has been developed according to the specific features of each engine and to its intended use (road, sport, rally, drag, circuit and more).

Depending on the model, Catcams spring retainers are made of steel or aluminium.

Image for illustration only