Lifter Clatter - New Engine
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Re: Lifter Clatter - New Engine
Thanks for your input Jacko but it's not just a little tappet noise. It's every rocker that's making a racket.
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
I once used some cheap proform rollers on a stocker, thinking it would be better than the stamped steel rockers when we changed a stock hydro cam (non roller)... I had two rockers that insisted on chattering.
Rotating the engine over by hand with covers off I was able to identify the offenders, but by pure fluke I rotated the engine backwards to try and see what was going on and the pushrod magically seated to the rocker after that?
Not sure why but after that I they didn't chatter until I didn't use the engine for a while. Once the lifters leaked down they chattered again. I ended up replacing all the pushrods in that case which solved the problem, but only did that is it was the cheapest form of elimination...
Charlie
Rotating the engine over by hand with covers off I was able to identify the offenders, but by pure fluke I rotated the engine backwards to try and see what was going on and the pushrod magically seated to the rocker after that?
Not sure why but after that I they didn't chatter until I didn't use the engine for a while. Once the lifters leaked down they chattered again. I ended up replacing all the pushrods in that case which solved the problem, but only did that is it was the cheapest form of elimination...
Charlie
C&M Engineering
Re: Lifter Clatter - New Engine
some rockers will touch the spring retainers
Re: Lifter Clatter - New Engine
in that case it is more fundamental then; eg pushrod length or primary oil gallery issueNuts wrote:Thanks for your input Jacko but it's not just a little tappet noise. It's every rocker that's making a racket.
'68 J-code GT Fastback
'67 S-code GT coupe, 'Pink Bitz' formerly known as 'Hookin' up a brother'
'69 M_____ GTS Fastback 'Blasted'
'67 S-code GT coupe, 'Pink Bitz' formerly known as 'Hookin' up a brother'
'69 M_____ GTS Fastback 'Blasted'
Re: Lifter Clatter - New Engine
No interference Shaun. Pushrod length is spot on Jacko. Going to yank the manifold and have a good looksee.
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
Any wiser Nuts?
Re: Lifter Clatter - New Engine
On to a few urgent jobs. I'll get back to it when I have nothing else to do.. I need break from it
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
Ok here's an update for you.. Problem was the Ford Racing Lifters just weren't up to the task. Switched to a set of Comp Cams 851 short travel lifters. Problem solved! Quiet as a mouse now. Owner very happy as he picked up best modified XL at the falcon nations recently!
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
Howards are about the best I've found, Ive had the comp cam break the push rod seats, but they were magnums not short travel, the short travel are a better lifter. The Howard Maximum effort are a real good lifter, but even the normal ones are pretty good.Nuts wrote:Ok here's an update for you.. Problem was the Ford Racing Lifters just weren't up to the task. Switched to a set of Comp Cams 851 short travel lifters. Problem solved! Quiet as a mouse now. Owner very happy as he picked up best modified XL at the falcon nations recently!
Re: Lifter Clatter - New Engine
I used the Eaton ones in my 347. They seem to be working well.
Re: Lifter Clatter - New Engine
It would appear that it all boils down to valve springs and cam. Although the cam profile is almost identical to my engine, the valve springs are very different. I'm using the stock springs that came with the edelbrock performers. Probably good for 6.5k. Pete is using AFR heads with much stronger springs and designed to rev all day at 8k.
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
AFR's come with a roller spring, 185 are good for mid 6000k, the 195 heads have Pac racing HR spring thats good for 7200, the bigger heads use a solid roller spring which are about 250 on the seat.Nuts wrote:It would appear that it all boils down to valve springs and cam. Although the cam profile is almost identical to my engine, the valve springs are very different. I'm using the stock springs that came with the edelbrock performers. Probably good for 6.5k. Pete is using AFR heads with much stronger springs and designed to rev all day at 8k.
Re: Lifter Clatter - New Engine
These are 205's and not sure what springs are fitted but I had to upgrade my valve spring compressor so I could compress the springs.Shaunp wrote:AFR's come with a roller spring, 185 are good for mid 6000k, the 195 heads have Pac racing HR spring thats good for 7200, the bigger heads use a solid roller spring which are about 250 on the seat.Nuts wrote:It would appear that it all boils down to valve springs and cam. Although the cam profile is almost identical to my engine, the valve springs are very different. I'm using the stock springs that came with the edelbrock performers. Probably good for 6.5k. Pete is using AFR heads with much stronger springs and designed to rev all day at 8k.
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic
Re: Lifter Clatter - New Engine
They will be a Pac racing spring 220 on the seat they are really a solid roller spring and should be swapped out on HR they put a heap of load on everything and just wear stuff out.
Last edited by Shaunp on Wed Nov 07, 2018 6:39 am, edited 1 time in total.
Re: Lifter Clatter - New Engine
Thanks for that Shaunp. I'll pull one set and measure them when I get the car back. Could explain a few things..
My Motto - Don't get Caught! If you do, Blame Someone Else!
MUSTANG - Fantastic Not Plastic
MUSTANG - Fantastic Not Plastic