i installed 1.7 ratio roller rockers today on stock e7te heads. i went by the book, took my time and everything was pretty straight forward. i coated the new pushrods with oil as well as the new rockers. i didn't need any shims, and i checked my pushrod lengths through various sources to verify they are the right length. so i crank the car and the the car is making a new sound. it's not a metallic tapping or clicking. i felt along the surface of the valve covers while the car was running and none of the rockers seem to be making contact with the valve covers. the valve covers are made by trick flow and are made to clear roller rockers. the sound is almost like a puffing sound if that makes any sense. does anyone have any ideas/inputs on how i can adjust this? if i can't i will just put the stockers back on til i can have a mechanic put them in. what is the torque setting for if and when i put the stock rockers back on? thanks.
new 1.7 rr's are noisy - how to adjust?
- Thread starter 90lxfoxbody
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i think they are 19 ft/lbs to torque them on. i think the problem here is the heads are pedastal mount and you put stud mount rockers on. is this the case? from what i understand the 2 style heads have different hieght mounting points. so the stud mount don't work on pedastal mout heads. the other thing is if i am correct in my assumption the stud mount need guides. guides for the push rods.
Are you sure they didn't need shims? I have installed several sets of the Crane Cobra rockers and some positions needed shims to get the correct preload on the lifter. If you get to much preload the intake or exhaust valve won't seat and it may sound like a muffled puffing back through the carb if it is the intake.
Chaingang
Chaingang
thanks chaingang - that was one of my immediate considerations. after the initial install i went back and removed all the rockers, then reinstalled them one by one double checking them. with each one i needed between 1/4 and 3/4 turn to finish them off hence i didn't think i needed shims. i finally gave up and reinstalled my old rockers and torqued them down to 20 lbs. when i was removing the new roller rockers i noticed two of my new pushrods were broken off at the ball end where it sits in the cup in the rocker arm. is this an indicator of something? did i just somehow tighten them too much?? or did i just get *****ty pushrods? they were 6.272 in length just like the stock ones i removed, and they were listed as hardened also. maybe i overlooked something that would be obvious to an experienced mechanic, which i am not 
push rod length
did you check your push rod length yourself? or did you go by what someone told you? for your push rod length. what i did was buy an adjustable push rod length tool, got and old lifter took it apart and put jb weld in it so it would not compress when rotating engine to find where rocker contacts valve stem. when rocker contacts middle of stem measure adjustable push rod. fairly simple task but crucial to your engine and wallet. if you busted more then one push rod then i doubt there was a flaw in push rod, you can bend a valve if you have wrong push rod length. if you have time . might want to take springs off of valves and take a peek at them. might save you money in the long run by doing so.
did you check your push rod length yourself? or did you go by what someone told you? for your push rod length. what i did was buy an adjustable push rod length tool, got and old lifter took it apart and put jb weld in it so it would not compress when rotating engine to find where rocker contacts valve stem. when rocker contacts middle of stem measure adjustable push rod. fairly simple task but crucial to your engine and wallet. if you busted more then one push rod then i doubt there was a flaw in push rod, you can bend a valve if you have wrong push rod length. if you have time . might want to take springs off of valves and take a peek at them. might save you money in the long run by doing so.
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