question on a valve spring problem

New set of springs and on one spring a very small peice of the spring broke off I would say between a 1/6 to a 1/8 of a inch can you just use a dotco and sand / polish it and use it? also might add it is on the main outside spring..thanks Dave

 

When we first tried PAC springs we were experiencing this, talked to them and for additional $$, they would "condition" the ends to eliminate this problem. My "problem" with that was if you KNOW you have a "problem"...why are you selling it like that in the first place?! What Brand do you have??

 

I run the Manley 221448 on the exhaust side of my engine. Before I install them I cut the end of the spring on beveled side about 3/8". I set them up .070 from coil bind and they hold up very well.

 

springs

Years ago I worked at Drake Engineering building Offy's. We would trim the tails off every spring . It was just what we learned to do after getting engines back to freshen up. After we started doing this the problem was gone.

 

Hey Dave
Look where your Dotco grinder was made Ha Ha

 

ring noel manton and he will help you set it up so it never happens like mike said you need a spintron to understand why it happens and then you will see it takes a tremendous amount of force to break that small peice better to set it up so the spring dosnt ossilate noel can help you with this and set you up with right parts.

 

I agree trimming the thin tips is always a great way to prevent problems.
Many springs come that way already. Like the Erson Valve Springs I use.

 

They were package springs I will trim of my ends...thanks for all the great help and thank to the now new name Mike the professor Canter...Dave

 

How the heck do you cut the tip off without touching thr next coil.

 

Slide them over a piece of thin metal clamped in a vice. Cut with a cutoff wheel on a die grinder.

 

Spring Fix

First ask your spring manufacture to provide a useable product. Sounds harsh but if we purchased a crank shaft and the manufacture sent it with a note: "You bot it, you own it, polish it your self". We would be concerned, at the least.
It is what it is.
SO---------First go to www.mcmaster.com and purchase a 12 inch piece of 6-6 nylon strip about an inch wide, .125 thick. Purchase a die grinder. Purchase about 30 small diameter cut off wheels, and the same amount of rubber based polishing wheels, and a fine quality screw driver.
Polish all of the edges of the screw drive. The reason for this is when you use this screw driver as a lever device you do not want to make any mark on the surface of the spring wire.
Use the screw driver to pry the spacer coil away from the active coil, and insert a piece of your 6-6 nylon. With the die grinder remove the thin portion of the spring wire.
The end must be polished, and the active must not be nicked, at all. If you nick the first active coil, JUST THROW THE SPRING IN THE CAN. DO NOT TRAY TO SAVE THE MISTAKE.
"If you do not do this the tail will remove it's self"
The best thing to do is just pay some one that has the desire to accomplish this task for a profit. The learning curve that goes along with can be very cost ineffective.
"I do agree that the spring manufacture should never allow a spring to leave their building unfinished".
"A spring tail in the oil pump of a funny car, can cost $ 60,000.00, or more and hurt some one.

noel

 

Manley valve springs

We highly recommend the use of MANLEY VALVE SPRINGS.

They have a staff that is very versed in valve train technology and have the ability to tell the truth and make a discussion when confronted with a spring issue, and with what we do today in the engine speed area we will see issues.

"On going breakage is unacceptable".

Noel

 

thanks Noel, just put on the manley spring and out to the dumpster with my pacs..Dave

 

I also agree Noel, but the Manley spring I run on the exhaust side of my engine WILL break the tip off with the spring setup .070 before bind. You can clearly see the mark it leaves on the coil below it. Easy fix is to trim the tip away and install the spring. Never had a problem doing this.

 

I epoxied some Moroso engine magnets by the oil drains (in the head), this has caught tips many times and is a cheap/easy fix.

Brandon Booher
NHRA TAD #34

 

Noel, does Manley actually make valve springs? I've seen theirs, Erson's and Competition Products and they all have the same specs and paint stripes. Makes me think they all repackage somebody else's. Who would that be?

Tom

 

Our promod ran Manley NExtec springs, and we used to break every spring tail off. Now we trim them ourselves. Finding chunks of steel floating around is a disaster waiting to happen.

 

How does trimming the end of the spring affect the spring pressure and spring harmonics? Obviously it doesnt break the tips off anymore.

 

OK anyone here running the pac's triples
How much are you trimming the outer coils tails 3/8" ,, 1/2"
Are you looking for a certain thickness of the finished tail?