I posted this in my project thread but thought I'll start a new thread regarding this issue.

Using the Rock Auto parts look up, I ordered EngineTech # ERV1432 valve springs but come to find out, my engine does NOT have Conical 0.635" I.D. valve springs. But Conical is the only valve spring choice on Rock Auto. Anyone seen this before? I.D. of my original spring is 0.845".

Pic of valve springs. EngineTech # ERV1432 on left with original retainer on top. Original spring on right...

 

Or does the small end of the spring go down? Larger end, up?

 

I got Mopar springs when I did mine. 2003 Dakota. Dug up an old pic of mine and they look conical. Part # 53020749AC.

I know there were changes throughout the years for the 4.7L but I don't know if the earlier versions had different valve springs. Try shopping on a Mopar site using your VIN and see what it pulls up. Maybe you can just get new retainer caps that fit the conical springs. Those are 4781090AA and in case you need it, the retainer locks are 53022277AA. Those are part numbers from my receipts.

 

Thanks Dodgevity!

I did a bit of internet digging. MoparPartsGiant has about the best price shipped that I could find. So the newer style retainers are on the way. Some of the sites list the application range as 2001-2011. I also found a Jeep Cherokee owner in the Jeep forums with an early 4.7L Cherokee who described the same issue I'm seeing. So, my assumptions based on available data is likely 1999 and 2000 model 4.7L's could have had different valve springs and retainers. I did search the Mopar parts sites but could not find a valve spring or retainer for my year so these parts have probably been long discontinued? Again, just a guess.

Oh boy! Now I have to re-do number #2 cylinder when the parts come. Yay!