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FE Power Forums => Non-FE Discussion Forum => Topic started by: AlanCasida on January 24, 2024, 01:24:18 PM

Title: Difference between solid and hydraulic roller lifters?
Post by: AlanCasida on January 24, 2024, 01:24:18 PM

Besides the obvious is there any difference in the construction of aftermarket solid and hydraulic roller lifters, particularly in the roller? I am considering changing from a solid roller to hydraulic roller cam in my BBF. I currently have the Comp Endura roller lifters with the EDM oiling to the roller. I read somewhere that Comp recommends replacing their solid roller lifters every 7500 miles. Just wondering if the construction of the hydraulic roller lifters give them a longer life span. Thanks!

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: blykins on January 24, 2024, 01:30:35 PM

A hydraulic roller lifter will always live longer (much, much, much longer) because they don't see the spring loads that a solid roller lifter sees and they don't have lash.   The combination of lash and spring load is what makes a solid roller lifter fail. 

A hydraulic roller lifter will pretty much live indefinitely.....think of how many 5.0 Mustangs and Explorers that have 100-200k miles on them. 

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: AlanCasida on January 24, 2024, 01:35:49 PM

Quote from: blykins on January 24, 2024, 01:30:35 PM

A hydraulic roller lifter will always live longer (much, much, much longer) because they don't see the spring loads that a solid roller lifter sees and they don't have lash.   The combination of lash and spring load is what makes a solid roller lifter fail. 

A hydraulic roller lifter will pretty much live indefinitely.....think of how many 5.0 Mustangs and Explorers that have 100-200k miles on them.

I understand that on OEM applications. Is the roller construction of Comp(as an example) the same on their solid and hydraulic roller lifters?

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: blykins on January 25, 2024, 12:45:32 PM

For the most part.  I don't use Comp lifters, but the wheels and needle bearings should be similar.

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: AlanCasida on January 25, 2024, 03:19:27 PM

Quote from: blykins on January 25, 2024, 12:45:32 PM

For the most part.  I don't use Comp lifters, but the wheels and needle bearings should be similar.

Thanks for your input, Brent I really appreciate it. What lifters do you use?

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: blykins on January 25, 2024, 03:25:21 PM

For hydraulic roller, I use Morel.   For solid roller, I either use BAM or Morel. 

Title: Re: Difference between solid and hydraulic roller lifters?
Post by: Falcon67 on February 06, 2024, 12:30:21 PM

I've had good luck with Howards solid rollers in my 351Cs.  I use the pressure oil models.  Some of the Comp units are splash only, I'd for sure stay away from those. IIRC the Howards are rebuildable.  I check mine every year - on a 351C 9.2 deck you can just lift them out without pulling the heads, so easy off season check.