Lawhead

iTrader: (14)

Well one broke today after my tranny swap. There is only one broke bought the motor used so not 100% sure what brand they are say I get on that is good for the lift of the 306 does it matter if it is a different brand then the others? will this hurt anything

speed_demon24

iTrader: (6)

So you don't care that the other 15 might be close behind in breaking? Valvesprings don't last 200k on cammed motors like the stockers do... they are a maintenance item.

Lawhead

iTrader: (14)

Motor is recently rebuilt so figured all the rest were fine this was just a freak thing

tbag_skywalker

I'd be uneasy about replacing just one spring unless I knew exactly what brand that and the other 15 are. Like speed_demon said, the other 15 could be on their way out, too.

You don't have to spend big bucks to get a good set of springs. I picked up Patriot Gold double springs with seats, seals, locks, and retainers for around $260, and they're good for a .650" lift.

bigj2717

iTrader: (15)

If you're going to do it do it right and replace them all so you know they are all good.

Lawhead

iTrader: (14)

Looks like the car will be down for another few weeks then

Puck

iTrader: (17)

You cannot match the proper open and closed pressures and install height without knowing what the rest of the springs are.

A spring for your modest setup would be relatively cheap - just get a full kit, change them all, and have piece of mind that the job was done right .

Lawhead

iTrader: (14)

Yeah it just sucks all the time for the tranny swap and this just happens it kinda urks me lol. Now that this happened thinking about going with a NSA package with the 1.6/1.7 split I was talking about doing see how that goes

flame

iTrader: (13)

You've got about a 99% chance that the valve hit the piston when the spring broke and bent the valve. How's the pushrod look?

trilkb

iTrader: (4)

Thunderracing tends to have alot of 10% off sales and they have patriots. The 8401's are what i have so im sure they would work well for you too. I think they were like 230$ after the 10% off.

The 8501's im sure are overkill for your application.

If your install height is 1.750 then the 8401's should be good. Thats if you want patriots. If you want the beehives then the Pacs that everyone else gets would be fine im sure.

joelster

I'm gonna guess and say you broke a 918 beehive from Comp.

Lawhead

iTrader: (14)

the spring didn't totally break push rod was fine

SoxXpupPeT

iTrader: (34)

id Never change just 1 valve spring.. But thats just me. Its cheap enough for a full patriot gold spring kit to just replace all 16 sets and be done with.

Lawhead

iTrader: (14)

Yeah I suppose

Just sucks having it right here almost done after swapping a tranny then it just happened to do that.

SS RRR

iTrader: (2)

You are going to find that when trying to maintain a modified engine you'll run into the "it just happened to do that..." here and there.
Hopefully it's nothing more than the brand of spring you used.

Lawhead

iTrader: (14)

Yeah trying to get a hold of the builder of the motor to see what was used probably go with the Patriot kit though for it and be done with it