Just broke a valve spring - recommendations?
Thread Starter
Staging Lane
Joined: Oct 2017
Posts: 66
Likes: 6
From: Waverly, NE
Just broke a valve spring - recommendations? Finally got my procharged 6.2l on the road this week, and had a valve spring on number 8 exhaust break on the way home about about a mile out. Not even 200 miles or through breakin yet.....The springs themselves are Pac 1219 (pretty sure) with probably 7k on them since I rebuilt the heads with the last build of this motor. The springs are supposed to be good to .625 lift.
Unfortunately, I need to pull the head to make sure there is no damage to the head or piston and retrieve the valve. Magnet down the valve guide is not working....
What spring(s) should I look at replacing it with- the same spring or replace them all with something else? Cam is GPI VVT LL2 with .553 lift, Johnson link bar lifters, BTR shaft system and BTR 7.500 1 piece 3/8 pushrods.
Truck is a DD that is primarily a highway cruiser that doesn't get beaten on too much/hard and will probably never see a track.
Unfortunately, I need to pull the head to make sure there is no damage to the head or piston and retrieve the valve. Magnet down the valve guide is not working....
What spring(s) should I look at replacing it with- the same spring or replace them all with something else? Cam is GPI VVT LL2 with .553 lift, Johnson link bar lifters, BTR shaft system and BTR 7.500 1 piece 3/8 pushrods.
Truck is a DD that is primarily a highway cruiser that doesn't get beaten on too much/hard and will probably never see a track.
Thread Starter
Staging Lane
Joined: Oct 2017
Posts: 66
Likes: 6
From: Waverly, NE
What could be the cause and remedy? It broke immediately after decel/DFCO and getting back up to 35mph/2-2500 rpm. I was using TUTD if that helps narrow down.
