TRIUMPH GT-6
 

 

Triumph GT-6 part numbers and interchangeable parts

Changes in equipment were made through the run of the GT-6. For the most part, changes for parts related to the engine were identified at the engine number at which the change commenced, & other changes identified at the chassis number at which the change commenced. So for those parts which change, it is important to note whether the change is at the engine or chassis number.

There was never officially a "Mk1" GT-6 produced, the first variety of GT-6 being identified by Triumph as "GT-6". However, that 1st GT-6 will be identified in this list as the "Mk1" for clarity.

The GT-6 Mk2 & USA-market GT-6+ were mostly the same car, with some engine differences. For those parts fitted to both, the car may be identified here as "Mk2/+".


Engine

ENGINE
Manifolds
Part description Part # # required per car Fitted to: Notes
Intake manifold 212770 1 Mk1 Fitted up to engine # KC/KD 50,000E
Intake manifold 308671 1 Mk2/+ Fitted from engine # KC/KD 50,001E
Intake manifold 312233 1 Mk3 Fitted up to engine # KE/KF/KG 10,000
Intake manifold 311749 1 Mk3 From engine # KE/KF 10,001
Exhaust manifold 306483 1 Mk1 only Engine #KC/KD 1 through KC/KD 50,000E;
NOT interchangeable with manifolds fitted to later engines supplied with Mk2/+ & Mk3
Exhaust manifold 308290 1 Mk2/+, Mk3 From engine # KC/KD 50,001E;
NOT interchangeable with manifolds fitted to earlier engines supplied with Mk1
Fuel pump
Part description Part # # required per car Fitted to: Notes
Fuel pump, complete assembly 206623 1 Mk1 From engine # KC/KD 5001E up to KC/KD 50,000E
Fuel pump, complete assembly 213577 1 Mk2/+, Mk3 From engine # KC/KD 50,001E & up
Upper casting 509928 1 Mk1 From engine # KC/KD 5001E up to KC/KD 50,000E
Upper casting & valves assembly 516538 1 Mk2/+, Mk3 From engine # KC/KD 50,001E & up
Lower body & primer assembly 509926 1 Mk1, Mk2/+, Mk3  
Valve & seat assembly 505239 2 Mk1  
Valves 515036 2 Mk2/+, Mk3  
Gasket, valve 515037 2 Mk2/+, Mk3  
Diaphragm assembly 501005 1 Mk1, Mk2/+, Mk3  
Spring, diaphragm 509925 1 Mk1  
Spring, diaphragm 52492 1 Mk2/+, Mk3  


Chassis frame

CHASSIS FRAME
Part description Part # # required per car Fitted to: Notes
Bracket Assembly, front suspension & engine mounting, RH 305592 1 Mk1, Mk2/+, Mk3, Herald, Vitesse NOT interchangeable with Spitfire
Bracket Assembly, front suspension & engine mounting, LH 305593 1 Mk1, Mk2/+, Mk3, Herald, Vitesse NOT interchangeable with Spitfire


Front suspension

FRONT SUSPENSION
Part description Part # # required per car Fitted to: Notes
Stud, front wheel 112429 8 Mk1, Mk2/+, Mk3 3/8 UNF thread
Bottom trunnion assembly, RH 140919 1 Mk3  
Bottom trunnion assembly, LH 140920 1 Mk3  


Rear axle

REAR AXLE
Part description Part # # required per car Fitted to: Notes
Stud, rear wheel 157558 8 Mk2, Mk3 (up to up to chassis # KE/KF 20,000) rotoflex cars only, 3/8 UNF thread
Stud, rear wheel 112429 8 Mk3 after up to chassis # KE/KF 20,000 swing-spring cars only, 3/8 UNF thread
Rotoflex coupling 152273 2 Mk2/+, Mk3 (up to chassis # KE/KF 20,000) Metalastik part # 21/979/1


Brakes

BRAKES
Front disc brakes
Part description Part # # required per car Fitted to: Notes
Front brake caliper bleed nipple 108756 2 Mk3 3/8" UNF thread
Front brake caliper assembly, RH 311852 1 Mk3 up to chassis # KE12389/KF12390  
Front brake caliper assembly, LH 311851 1 Mk3 up to chassis # KE12389/KF12390  
Front brake caliper assembly, RH 159027 1 Mk3 from chassis # KE12389/KF12390  
Front brake caliper assembly, LH 159026 1 Mk3 from chassis # KE12389/KF12390  
Rear drum brakes
Rear wheel hydraulic cylinder assembly GWC 1110 2 Mk3 up to chassis # KE12389/KF12390  
Rear wheel hydraulic cylinder assembly, LH 519797 1 Mk3 from chassis # KE12389/KF12390  
Rear wheel hydraulic cylinder assembly, RH 519798 1 Mk3 from chassis # KE12389/KF12390  
Brake drum, rear 203077 2 Mk3 up to chassis # KE/KF 20,000  
Brake drum, rear 215754 2 Mk3 from chassis # KE/KF 20,000  


Radiator

Radiator
Part description Part # # required per car Fitted to: Notes
Radiator filler cap 137691 1 Mk1 7 lb. cap, superseded by GRC112 (direct replacement)
Radiator filler cap GRC112 1 Mk2/+ 7 lb. cap, superseded from 137691 (direct replacement)
Radiator filler cap GRC114 1 Mk3 13 lb. cap
Radiator block assembly 307624 1 Mk1, Mk2/+ Uses 7 lb. cap
Radiator block assembly 311873 1 Mk3 (All markets including USA, except USA after commission # KF 10,000) Uses 13 lb. cap
Radiator block assembly 312319 1 Mk3 (USA only from commission # KF10,001) Uses 13 lb. cap, includes thermostatic vacuum switch part # 90/611428


Electrical equipment

ELECTRICAL EQUIPMENT
Rear Number Plate Lamp
Part description Part # # required per car Fitted to: Notes
Nut, lamp base to bumper HN2005 2 Mk3 (US, up to commission # KF20,001) plain nut, #10 UNF
Early Mk3 single bumper-mounted number plate lamp
Flat washer, lamp base to bumper WM0055 2 Mk3 (US, up to commission # KF20,001) flat washer, #10
Early Mk3 single bumper-mounted number plate lamp
Split lockwasher, lamp base to bumper WL0205 2 Mk3 (US, up to commission # KF20,001) split lockwasher, #10
Early Mk3 single bumper-mounted number plate lamp


Body & fittings

BODY & FITTINGS
Front Valance, Frontal Grille, Engine Bay Valance
Part description Part # # required per car Fitted to: Notes
Front valance corner panel assembly (LH) 815391 1 GT-6 Mk3, Spitfire Mk IV, Spitfire 1500  
Front valance corner panel assembly (RH) 815392 1 GT-6 Mk3, Spitfire Mk IV, Spitfire 1500  
Front Seat Assembly
Part description Part # # required per car Fitted to: Notes
Setscrew, seat slide assembly to floor HU0707D 8 Mk3 setscrew, 1/4" UNF x 7/8", has pointed end to assist in reaching attachment
Flat washer, seat slide assembly to floor WP0023 8 Mk3 flat washer, 1/4"
Split lockwasher, seat slide assembly to floor   8 Mk3 split lockwasher, 1/4"


TRIUMPH GT-6
 
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