hey all.
i recently purchased some yella terra roller rockers to put onto my yt head. came to put them on and the studs on the head are bigger than the hole in the rockers.
can the studs be removed? and use different studs, or do i have to machine the hole in the rockers?
cheers ant
yella terra head help
Started by
ant285
, Jul 24 2011 01:32 PM
7 replies to this topic
#1
ant285
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Posted 24 July 2011 - 01:32 PM
#2
FastEHHolden
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Posted 24 July 2011 - 05:10 PM
what size stud and what size hole?
#3
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Posted 24 July 2011 - 08:56 PM
what size stud and what size hole?
Sounds like you bought the wrong ones to suit your head.
If you can post a pic of the head and rockers would be helpful.
#4
originalglenn
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Posted 24 July 2011 - 09:55 PM
hey all.
i recently purchased some yella terra roller rockers to put onto my yt head. came to put them on and the studs on the head are bigger than the hole in the rockers.
can the studs be removed? and use different studs, or do i have to machine the hole in the rockers?
cheers ant
assuming they look like this
http://www.yellaterra.com.au/products/car-performance/product-detail/part.cfm?partIdentity=105&modelIdentity=50&productCategoryIdentity=4
they come in 2 sizes either to suit 3/8 or 7/16 studs
if the studs look like this
http://www.yellaterra.com.au/products/car-performance/product-detail/part.cfm?partIdentity=257&modelIdentity=50&productCategoryIdentity=7
you could unscrew the 7/16 and replace them with 3/8
you cant machine the rockers youve got without then having to replace the posilocks
if you bought them new just send em back
#5
originalglenn
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Posted 24 July 2011 - 10:16 PM
also if you got them secondhand read these instuctions first before you break something
http://www.kustombit...ella-terra.html
have you got guide plates? have a look in the head where the pushrods go if its a round hole youll need em
http://www.kustombit...ella-terra.html
have you got guide plates? have a look in the head where the pushrods go if its a round hole youll need em
#6
ant285
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Posted 31 July 2011 - 04:01 PM
just had a look at the head. its got 3/8 studs. and the hole in the rockers as 7/16. had a go removing them by locking two nuts together but they will not budge.
time to seek the pros i think
time to seek the pros i think
#7
_Bomber Watson_
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Posted 31 July 2011 - 04:23 PM
Think you have it the wrong way around??? 7/16 is bigger than 3/8....
Cheers.
Cheers.
#8
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Posted 31 July 2011 - 08:20 PM
just had a look at the head. its got 3/8 studs. and the hole in the rockers as 7/16. had a go removing them by locking two nuts together but they will not budge.
time to seek the pros i think
Sounds like you have the original 3/8" Holden studs. These are press in items, they are not screwed into the head.
If you have the 7/16" screw in studs they will have a hex at the base for a spanner. To fit screw in studs the head needs to be removed so the rocker stud bosses can be machined down and the 7/16" threads cut.
Easier to get the correct roller rockers to fit your head.
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