Progress Thread Diagnosis front end clunk (and more)
- Thread starter JD1964
- Start date
Those gaskets crush big time to seal
I wouldn’t change the bolts. I never did
I wouldn’t change the bolts. I never did
How are you checking this ? To measure technically you should be used a solid lifter or a modified Hyd that the plunger won’t collapse.
1/2 turn to 3/4 preload on the stud mount rockers from zero lash. I’ve found some lifters like a little Less then others.
I don’t think I’ve ever seen the solid lifter preload measure process for a hydraulic lifter valve train that used pedestal mounted rocker arms. Can you describe this method precisely or link me to a write up or YouTube that shows it?
I gradually tighten the rocker bolt just to the point where there’s no slop in the rocker movement and the pushrod won’t move up and down but you can still just barely rotate it. Thats zero lash. Then I count the number of bolt rotation to cinch the bolt up snug. The first two I checked were 1 full turn and 1 1/4 full turn. That’s a tad too much for my liking
DadLife0724
Active Member
Are you looking at lifters and getting them both to lowest point before setting zero lash? I assume since you just put the heads on you still have lower intake off.
Yes I’m on the base circle of the cam when doing the process. TDC on the compression stroke for the cylinder
DadLife0724
Active Member
What are you checking ? Pushrod length or just shimming your rockers. I didn’t realize those heads still use pedestal rockers
Shimming your rockers , that ive never had to do I never ran pedestals except on a used engine I had but that didn’t last long.
So I can’t comment it sounded like you were checking pushrod length.
I’m shimming pedestal rockers. I have stock forged piston in this 302. According to Airflow Research, the AFR 165 Renegade pedestal style heads are the only AFR heads that work with stock pistons.
Meh, gonna call BS on that but my guess is they are saying without claying the motor because it all depends on the camshaft timing events as to whether or not a specific head will work with a specific short block. With you having a stock forged short block then you most likely have the pistons with the reliefs which opens up a whole world of possibilities.
Go here and scoll down to pedestal mount installation instructions:
scorpionracingproducts.com
Summit has them on their site as well:
Go here and scoll down to pedestal mount installation instructions:
Technical support
Scorpion roller rockers and shaft mounted rocker arms are the best in the world. Don’t Miss Anything!
scorpionracingproducts.com
Summit has them on their site as well:
quote from the AFR product description on the AFR website.
"in addition these are the only AFR heads that are compatible with the OEM piston valve relief."
"in addition these are the only AFR heads that are compatible with the OEM piston valve relief."
FWIW, I’m running Ford Motorsport 1.7 full roller pedestal mount rockers. Made by Crane Cams and I’m not sure if they even make them anymore. Pretty pricey if you can find a set. There’s a set on eBay listed for $1000. Obviously I think that’s insane!
Here’s a couple pics of mine
Here’s a couple pics of mine
Yeah here’s a used set for $700
86-93 Ford Fox Body Mustang 5.0L 302 Cobra Crane 1.7 Roller Rockers OEM | eBay
93 Cobra 1.7 Crane Roller Rockers. Nate's 79-93 Fox Mustang Parts. 5.0L HOFits: 79-93 Ford Mustangs with 5.0L V8. I have to build those fees into my prices to cover those expenses.
ebay.us
And a new set for $1000
Ford Motorsport 1.7 Roller Rockers Pedestal Mount | OE
These are ford motorsport part number M-6564-A50 and crane part number F3ZE-6529-AB. I can't bring my self to open these. I have had these since 1994.
ebay.us
Still trying to find my damn pedestal shims. You see, I needed them and used them the first time around. Then I changed to Cometic head gaskets and ran a slightly thicker gasket so I didn’t need the shims. This time with the new AFR heads I’m going back to 9333 PT1 gaskets and I need the shims again. Can’t find em darn it. Might have to buy them again.
Similar threads
