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Outer Valve Spring + Retainer Kit CATCAMS VAG 1.4 TSI CAVE CAVD CTHE - 16 Valves

Reinforced valve spring set VAG 16V AUA APE BBY BKY AVY BTS CAVE CAVD CTHE

€368.64 (tax incl.)

€460.80 (tax incl.) -20%

Set of 16 reinforced valve springs for the Volkswagen 16-valve engines AUA, APE, BBY, BKY, AVY, BTS, CAVE, CAVD and CTHE.

Brands: CATCAMS
Engines: AUA, APE, BBY, BKY, AVY, BTS, CAVE, CAVD, CTHE
Springs: single
Contents: springs and upper retainers

The VW 16-valve AUA, APE, BBY, BKY, AVY, BTS and 1.4 TSI CAVE, CAVD, CTHE engines

These nine Volkswagen engine codes cover the 16-valve 1.4 and 1.6 units AUA, APE, BBY, BKY, AVY and BTS, plus the 1.4 TSI CAVE, CAVD and CTHE. The latter power the Polo GTI, Golf 5 and 6, Scirocco, Beetle and SEAT Ibiza Cupra. The set supplies 16 springs, one for each valve.

Only the springs and the upper retainers change; the spring seats and collets fitted at the factory stay where they are.

CATCAMS reinforced valve spring set

When the cam retreats, the spring brings the valve back against its seat and holds it there until the next opening. At high revs the valve and its supports (retainer, collets) gain inertia: a spring that cannot keep up lets them float, slap the seat, even touch the piston.

The CATCAMS set pairs 16 single springs PAC-E99864 with 16 upper retainers 99480/S. Depending on the engine, loads range from 206 to 255 N at the seat and 530 to 588 N in lift (see below).

Valve spring kit technical specification

Part number	Brand	Springs	Outer / inner Ø	Seat pressure	Open pressure	Rate	Max lift	Kit contents
PAC-E9986416+99480/s16	CATCAMS	Single	Outer 24.8 mm	Depends on engine	Depends on engine			16 springs, 16 upper retainers

Valve spring kit fitting details

Part	VAG original	Reinforced spring kit
Spring	036 109 623 H, N, R, AC or AB depending on engine	Kit specific: PAC-E99864 (CATCAMS)
Retainer	036 109 641 B	Kit specific: 99480/S (CATCAMS)
Spring seat		Original kept
Collets		Original kept

The set includes 16 single springs PAC-E99864 and 16 upper retainers 99480/S. The original spring seats and collets are kept.

For installed height, measure the distance from the spring seat to the upper retainer while the valve is shut; a load only means something at the height printed with it. Machining the valve seats widens that distance, and every millimetre removed lowers the load by the rate of the spring, counted in newtons. Check all 16 valves once the cutting is done.

Engines	Installed height	Seat pressure at this height	Open pressure
AUA, APE, BBY, BKY	31.3 mm	255 N	579 N at 12.0 mm
AVY	33.0 mm	206 N	530 N at 12.0 mm
BTS	31.3 mm	255 N	588 N at 12.0 mm
CAVE, CAVD, CTHE	31.3 mm	255 N	588 N at 12.0 mm

Technical guide

Our brands

Cat Cams N.V., trading as CATCAMS, is a Belgian company specialising in competition camshafts sent to customers worldwide; its CNC machining even shapes inclined lobes. Its springs are engineered together with those camshafts, some of which took part in the BTCC and at Le Mans.

How to choose

A stiffer spring holds the valve against its cam when the engine winds up: it makes room for a hotter camshaft, more revs or a turbo without float. CATCAMS publishes neither the rate nor the maximum lift of this set, so have CATCAMS confirm that your camshaft's lift is suitable before you order.

Criterion

Key point

Choosing the pressure

One part number serves every one of these engines, yet the load varies with the engine: 206 to 255 N at the seat per the installed height table. To decide, compare camshaft lift, the revs you target and any turbo; a load beyond what the build needs only wears cams and tappets. CATCAMS gives no figure for the original spring load, so no percentage gain is claimed. A heavier load also means extra friction and wear, with no better cam control, and parts that age faster for nothing at all.

Single or double spring

Each valve carries one spring, part number PAC-E99864, together with the 99480/S upper retainer. The set contains neither a double spring nor an inner spring.

When reinforced springs become necessary

Camshaft with more lift or duration than stock
Higher rev limit
Turbo or supercharger fitted on the car
Head rework aimed at rally, drift or circuit
Springs giving up, valves floating close to the cut-out

Compatible vehicles

Model	Engine code	Power	Years
VW Polo GTI 6R	CAVE / CTHE	180 hp	2010-2014
SEAT Ibiza Cupra 6J	CAVE / CTHE	180 hp	2009-2015
VW Golf 5	CAVD	160 hp	2008-2013
VW Golf 6	CAVD	160 hp	2008-2016
VW Scirocco 3	CAVD	160 hp	2008-2017
VW Beetle	CAVD	160 hp	2011-2016
VW engine	AUA / APE / BBY / BKY	75 hp
VW engine	AVY	125 hp
VW engine	BTS	105 hp

OEM part number (valve spring): 036 109 623 H (APE); 036 109 623 R (AUA, BBY, BKY and CAVD, CAVE, CTHE inlet), the older 036 109 623 H and P no longer being supplied; 036 109 623 N (BTS); CAVD, CAVE, CTHE exhaust: 036 109 623 AC (AB also on CAVD).

Important: this set is reserved for the Volkswagen engines AUA, APE, BBY, BKY, AVY, BTS, CAVE, CAVD and CTHE. Other VAG engines, including other 16-valve 1.4 and 1.6 units, take different part numbers: check the engine code before ordering.