Mystery clamp

qwakers · 2026-03-19T21:25:04+0000

i have a mystery clamp, can anyone identify it for me? i haven't got a clue what its for.

Seadog · 2026-03-19T21:26:14+0000

Valve spring compressor

qwakers · 2026-03-19T21:29:32+0000

i can see where you're going with that, but ive never seen a valve spring compressor that looks like that...

having said that, i googled it and it would appear you are correct...

61-3341 Valve Spring Compressor Tool - BSA, Triumph, Royal Enfield OHV Models - BBB

Valve Spring Compressor Tool

www.britishbikebits.com

awemawson · 2026-03-19T21:31:38+0000

I used to use an identical one on my motorcycles back in the late 1960's - it's probably still kicking around here somewhere !

brightspark · 2026-03-19T21:31:52+0000

i have one not made by britax though

zzr1200 · 2026-03-19T22:23:06+0000

Looking at the size of it, I reckon it's probably for a side valve engine in a car, appears to be an adjustable a 6 to 10 inch opening for removing the valve stem collets, larger than I would expect for a motorcycle engine.

PS: Just found this, appears to be for an OHV engine:-

Pardon our interruption...

Agroshield · 2026-03-20T07:36:43+0000

zzr1200 said:
Looking at the size of it, I reckon it's probably for a side valve engine in a car

The distance between the feet at the base of it would give an idea of the minimum size of valves it would work on.

Greeves246 · 2026-03-20T08:03:47+0000

Two side valve and one OHV spring compressor. The small tool is to pull the ends of a chain together to insert the spring clip.
I’ve another OHV one with the ends squeezed together for use on small Honda C90 type engines.

Cobbler · 2026-03-20T08:52:08+0000

I removed & refitted the valves in several heads using a large G clamp & a bit of tube with a slot cut in to access the collets. A bit slow, but worked well. Same principle as those 2, perhaps I should have patented it :laughing: