PR 91 Welch plugs

General engine, transmission or drive line questions including tuning questions for all engine types
Post Reply
User avatar
KJB
Posts: 619
Joined: Fri Nov 07, 2008 9:05 am
Car(s): Bellett GT, Bellett Sedan, Prince Skyline GT, Porsche tractor, Lanz Bulldog, 996 Carrera 4,Prince Miler,
Location: Western Victoria

PR 91 Welch plugs

Post by KJB »

PR91 Welch plugs are 1.25" diameter - (must be a carry over from Hillman days! ) not 32mm (very close but not quite!)
Around here the Laws of Physics and Reality are strictly enforced !
Top
User avatar
flying
Posts: 259
Joined: Mon Nov 15, 2010 3:11 am
Car(s): 1967 GT Bellett
Location: Adelaide

Re: PR 91 Welch plugs

Post by flying »

Hey KJB
Just like the spin on oil filters with 3/4-16 thread not 20 mm
Cheers
Top
PR91
Posts: 2521
Joined: Tue Sep 16, 2008 11:54 am

Re: PR 91 Welch plugs

Post by PR91 »

Alot of cars are 3/4 oil filters. Is the most common size even in Japanese stuff.
Top
Post Reply

Return to “Engine, Carby and Transmission”