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Poly Locks 

 

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 Post subject: Poly Locks
Posted: Tue Jan 02, 2007 7:07 pm 
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Need to purchase poly locks for my r r . Hope someone could tell me whether the stock heads on 5.0ltr use 3/8 or 7/16? Thanx
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Posted: Tue Jan 02, 2007 7:18 pm 
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Do you mean POSI_LOCKS :roll: :?:

 

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Posted: Tue Jan 02, 2007 7:26 pm 
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my bad, YES Posi locks.
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Posted: Tue Jan 02, 2007 7:30 pm 
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So what exactly have you done here, machined for screw in studs etc, or fitted bolt on adjustables?
You could measure the shaft on the studs to find out if you need 3/8 or 7/16.
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Posted: Tue Jan 02, 2007 8:15 pm 
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Im soon to remove the heads and machine to suit rr and new springs.

Im not real sure what I need (never done rr b4). Thats the reason for the question, triing to source all the parts before I rip the heads off :?

I guess I should had asked what size bolt is used in the stock rockers so I can get the correct sized studs and then the correct posi locks to suit the studs

mick
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Posted: Tue Jan 02, 2007 8:19 pm 
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Are you buying new rollers?
If so the posi locks come with them.
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Posted: Tue Jan 02, 2007 8:25 pm 
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k so that sorted, what size studs do I need 3/8 or 7/16 ?
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Posted: Tue Jan 02, 2007 8:30 pm 
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Hi,mick my engine builder will be back on the 15th and he knows wat size studs, posy locks you will need to fit those rollers and springs,myself i haven't got a clue on sizes the posy locks that i bought with rollers were to big so that might tell some if they are 3/8 or 7/16,i can tell metric sizes but imperial is double dutch

 

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Posted: Tue Jan 02, 2007 8:44 pm 
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yeh that would be great, will makes it alot easier :D

thanx rick
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Posted: Tue Jan 02, 2007 8:46 pm 
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ixlrate wrote:
Hi,mick my engine builder will be back on the 15th and he knows wat size studs, posy locks you will need to fit those rollers and springs,myself i haven't got a clue on sizes the posy locks that i bought with rollers were to big so that might tell some if they are 3/8 or 7/16,i can tell metric sizes but imperial is double dutch
i think stock is 5/16 unc threads, roller rocker posts are 3/8 or 7/16 unc threads, you have to drill, tap all post threads bigger-both heads,and use studs,to lock down

 

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Posted: Tue Jan 02, 2007 8:47 pm 
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Well, do you have bolt on rollers, or adjustable?
Are the roller rockers on the car?
If not, measure the shaft size on the roller trunion.
The posi lock size depends on the roller rocker used.
Stock heads on Windsors DO NOT have screw in studs, guide plates, hardened pushrods.
They are a bolt on, non adjustable type.
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Posted: Tue Jan 02, 2007 8:49 pm 
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ixlrate wrote:
Hi,mick my engine builder will be back on the 15th and he knows wat size studs, posy locks you will need to fit those rollers and springs,myself i haven't got a clue on sizes the posy locks that i bought with rollers were to big so that might tell some if they are 3/8 or 7/16,i can tell metric sizes but imperial is double dutch
i think stock is 5/16 unc threads, roller rocker posts are 3/8 or 7/16 unc threads, you have to drill, tap all post threads bigger-both heads,and use studs,to lock down

 

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Posted: Tue Jan 02, 2007 8:49 pm 
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To give you a rough indication (Without being exact to the . of a mm), 3/8 is around 9.5 mm, 7/16 is around 11 mm.
If the posi locks were too big then you obviously need 3/8.
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Posted: Tue Jan 02, 2007 9:01 pm 
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Walker wrote:
To give you a rough indication (Without being exact to the . of a mm), 3/8 is around 9.5 mm, 7/16 is around 11 mm.
If the posi locks were too big then you obviously need 3/8.


Maybe i got it wrong but i've just measured them and it's 11mm so that makes them 7/16??,anyway you should have them in you hands early next week and you can take them to a workshop or so and get advice on the correct size,as far as i know these r adjustable.

 

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