PAC springs valve spring locators?

rboyle · 03-26-2018, 01:04 PM

Having a problem with a new set of springs PAC 1409X being installed on my 882 heads. I will need either locators or a different retainer to get the correct installed height and 200 lb seat pressure.
Problem is I cant find anyone that makes either a spring locator with a .760” inside diameter and 1.25” outside diameter with an .840” valve spring inside diameter. Does anyone make something like this or is there another solution we are missing?
Thanks
Rich

richie 2 · 03-26-2018, 01:48 PM

plus or minus machined locks from crane or comp cams can help... if u use plus .050'' locks you have to watch the retainer to underside of rocker. roller rockers there should be sufficient clearance there....what is the required installed height and what r u getting presently?

rboyle · 03-26-2018, 02:01 PM

We got 1.90” with the retainer and 140 lbs with no shim. We can shim it up to 180 but not much material left to locate the springs then

richie 2 · 03-26-2018, 03:17 PM

a retainer providing less installed height and/or -.050'' locks should get you down to 1.800''. leave the bottom alone to help keep the spring located properly.

rboyle · 03-26-2018, 07:18 PM

Thanks Class Racers and Jim Marshall and Jim Lewis for getting me squared away!

BillK · 03-26-2018, 07:51 PM

Rich,
Just want to add that it would be a good idea to get the same brand keepers as your retainers. I have seen a bunch of cases lately where locks from one manufacturer do not properly fit another's retainer etc. And this is not no-name stuff. You would think that any 7 degree lock should fit any 7 degree retainer but it is not the case.

rboyle · 03-26-2018, 08:24 PM

Thanks Bill, yes we are using matched retainers and keepers from the same manufacturer

Larry Hill · 03-27-2018, 07:36 AM

Sometimes machining a new part is necessary to get the locator to fit the head. For some of us its not a Chevrolet world.

340Cuda · 03-27-2018, 10:17 AM

Quote:

Originally Posted by Larry Hill

Sometimes machining a new part is necessary to get the locator to fit the head. For some of us its not a Chevrolet world.

Exactly my experience....

03-26-2018, 01:04 PM	#1
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	PAC springs valve spring locators? Having a problem with a new set of springs PAC 1409X being installed on my 882 heads. I will need either locators or a different retainer to get the correct installed height and 200 lb seat pressure. Problem is I cant find anyone that makes either a spring locator with a .760” inside diameter and 1.25” outside diameter with an .840” valve spring inside diameter. Does anyone make something like this or is there another solution we are missing? Thanks Rich

03-26-2018, 01:48 PM	#2
richie 2 Senior Member Join Date: Feb 2009 Posts: 916 Likes: 319 Liked 155 Times in 71 Posts	Re: PAC springs valve spring locators? plus or minus machined locks from crane or comp cams can help... if u use plus .050'' locks you have to watch the retainer to underside of rocker. roller rockers there should be sufficient clearance there....what is the required installed height and what r u getting presently?

03-26-2018, 02:01 PM	#3
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	Re: PAC springs valve spring locators? We got 1.90” with the retainer and 140 lbs with no shim. We can shim it up to 180 but not much material left to locate the springs then

03-26-2018, 03:17 PM	#4
richie 2 Senior Member Join Date: Feb 2009 Posts: 916 Likes: 319 Liked 155 Times in 71 Posts	Re: PAC springs valve spring locators? a retainer providing less installed height and/or -.050'' locks should get you down to 1.800''. leave the bottom alone to help keep the spring located properly.

03-26-2018, 07:18 PM	#5
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	Re: PAC springs valve spring locators? Thanks Class Racers and Jim Marshall and Jim Lewis for getting me squared away!

03-26-2018, 07:51 PM	#6
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 222 Likes: 10 Liked 26 Times in 15 Posts	Re: PAC springs valve spring locators? Rich, Just want to add that it would be a good idea to get the same brand keepers as your retainers. I have seen a bunch of cases lately where locks from one manufacturer do not properly fit another's retainer etc. And this is not no-name stuff. You would think that any 7 degree lock should fit any 7 degree retainer but it is not the case. __________________ Bill Koustenis

03-26-2018, 08:24 PM	#7
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	Re: PAC springs valve spring locators? Thanks Bill, yes we are using matched retainers and keepers from the same manufacturer

03-27-2018, 07:36 AM	#8
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,276 Likes: 1,635 Liked 9,450 Times in 1,955 Posts	Re: PAC springs valve spring locators? Sometimes machining a new part is necessary to get the locator to fit the head. For some of us its not a Chevrolet world. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817