Valve Spring Compressor for Lotus Twin Cam heads

Jerry Poole

New member
Could anyone on the forum direct me to an American made version of a Valve Spring Compressor for a lotus Twin Cam Cylinder head? Thanks, Jerry
 

fordboy628

Moderator
Staff member
jerry poole said:
Could anyone on the forum direct me to an American made version of a Valve Spring Compressor for a lotus Twin Cam Cylinder head? Thanks, Jerry
Jerry,

American made, in a word, NO. Anything suitable to fit Lotus T/C is LONG out of production. I have and use a very old, circa 1950's, Sunnen C-clamp type spring compressor, with an adaptor which I fabricated. I'll take some photos and post them to this thread when I get some time. I have been looking on Flea-bay and elsewhere for a duplicate for three years, with no luck.

If you are just working on your own head, occasionally, one of the small engine, OHV, motorcycle style, manual c-clamp spring compressors will suffice in a pinch. They come with a variety of "adaptors" to compress the spring assembly while "down in the recess". It takes a bit of "juggling" and it helps to be patient, and have 3 hands . . . . .

You MAY need a tasty chilled and fermented beverage afterward . . . . .
 

zuzulo56

New member
fordboy628 said:
Jerry,
You MAY need a tasty chilled and fermented beverage afterward . . . . .

Mother always cajoled us kids to drink ALL our beer...she knew that the best-tasting bit was at the bottom, and would make us 'Stout Fellows'!
(AND also mollify the craving for sweets.)


[108]
 

fordboy628

Moderator
Staff member
zuzulo56 said:
fordboy628 said:
Jerry,
You MAY need a tasty chilled and fermented beverage afterward . . . . .

Mother always cajoled us kids to drink ALL our beer...she knew that the best-tasting bit was at the bottom, and would make us 'Stout Fellows'!
(AND also mollify the craving for sweets.)
Heeyy . . . . If the beer is not the color of used motor oil, it's probably not worth drinkin' . . . . .

Just sayin' . . . .

Thanks for the chart!!

Cheers
 

fordboy628

Moderator
Staff member
So this is what I use . . . . . .

This is a very old Sunnen "C-clamp" style valve spring compressor, which I have owned from new, since 1972. The head piece is the optional racing valve spring head, originally available from Sunnen. These are NO LONGER AVAILABLE, but, you might score one on ebay, I see them from time to time. Expect to spend $50 to $100 USD for a decent one. The part number is DL-120. I was fortunate enough to score a spare basic tool off ebay, a couple of years ago.

Don't bother calling a Sunnen sales rep about availability on this tool. It has been out of production since before most of them were born!



This is the complete setup. Also shown is an "open style" extension adaptor. You can buy a set of these adaptors on ebay for $15 to $25 USD. I added the fixing bolt and nut so I could accomplish the task with 2 hands.
https://flic.kr/p/2ga59tK

Close up of the number.
https://flic.kr/p/2ga4KYv

Close up of the spring "business end".
https://flic.kr/p/2ga4KXy

Another view of the "business end" This setup also works for other DOHC or SOHC style heads, ie, Jaguar, BMW, Gordini, Cosworth, etc, etc.
https://flic.kr/p/2ga4KTL

Without the extension adaptor, the spring compressor can be used for many "normal" OHV engines, ie, BMC 'A', BMC 'B', Ford, Datsun, etc, etc.

There are alternatives to this venerable and rare setup. I'll dig out another more current tool and post photos at some later time. BUT, that one also needs to be adapted for overhead cam work.

Cheers
 

tabsracer

Crazy about Datsuns

Mother always cajoled us kids to drink ALL our beer...she knew that the best-tasting bit was at the bottom, and would make us 'Stout Fellows'!
(AND also mollify the craving for sweets.)


[108]
Your Back!
Thanks for posting the Ale Chart!
Cheers
 
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