mpcv2000

iTrader: (1)

I have a set of 1.60 Roller Rocker from COMP Cams on my stoked LT4 using a 7/16" stud and this weekend a nut came lose making some nasty noises.
I have no damage because I've stopped the car right away.
I've try to re-tork it using the the Shbox write up and even before applying any pressure on the PolyLock it broke right off.

I'll suspect it cracked and came lose but anyway , I've been driving the car for 17,000 KM and this is the first issue I have had with the new motor so far.


Since I'm not too sure of the exact part number of the Roller Rocker and studs I have I ask you guys to give me your inputs.


Here's what I found out when I've removed the valve covers :







It was holding there by 2 or 3 threads.









I was barely starting to tight the Polylock ( 1/8 to 1/4 turn procedure ) and it broke .



















I'd like to order 1st thing tomorrow morning what I need to get me back on the road but I'm not too sure if the replacement part I've found is the right one.


I think I need 1401B-1 (..PolyLock search on CompCams web site ..) .

Am I right ?

Thanks.

99Bluz28

iTrader: (35)

No, that pt# is not correct.
Let see what I can find.

mpcv2000

iTrader: (1)

Glad I asked before ordering anything.


I have until Monday morning so I can hopefully get it the very next day or so.


Thanks for helping me .

99Bluz28

iTrader: (35)

Set you a pm with links for the correct part.

mpcv2000

iTrader: (1)

Got it.

I was way off tho....

Tomorrow morning I'll phone around.

Sadly I'm in Canada so for me to get it the very next day is almost impossible unless I spend a lot of money on shipping.

We'll see.

Part number needed 4603-16 .






Rocker Arm Nuts, Magnum, Roller Rockers, 7/16 in.-20 Thread, .6752 in. Outside Diameter, Set of 16



Thanks 99Bluz28



Martin

flame

iTrader: (13)

I broke one like that a few years ago. I couldn't get a comp set same day but any 7/16" lock will work. I think I even have 15 more some where still. I can check if you're interested. Pay the shipping and I'm in Ontario.

mpcv2000

iTrader: (1)

Very interested .
You are in Ontario and I'm in Quebec.
I'll pay Canada post + your fees to get them tomorrow ( Tuesday ) .

Paypal is OK ?

I'll try to get a hold of you later on this morning.

Tanks again.

mpcv2000

iTrader: (1)

Got a Brand new kit today so I now have 15 spares.

I should put this back together tomorrow evening and we'll see if there is other damage.

( hope not )

mpcv2000

iTrader: (1)

Thursday evening .
I'm getting ready to re-assemble my top end ( if I can say ) and I've ordered the wrong PolyLocks .

Maybe I have a older sets of 1.6 Roller Rockers and the PolyLock are different ?

Anyway here's what I've got :













Right is the new one ( obvious )














Now left is the new one....




























I was hoping my car will be running tonight but looks like it won't happen.

I have also someone at CompCams that is aware of what I'm looking for so I hope I'll get the right part number before noon tomorrow so I can get the part on Friday.

mpcv2000

iTrader: (1)

With what I know now I went back on COMPcams web site and found the right one I think.

They called them : Hi-Tech™ Polylocks, 7/16" Stud.








Rocker Arm Style : Full roller
Rocker Arm Nut Style : Polylock
Rocker Stud Thread Diameter : 7/16-20 in.
Overall Height (in) : 1.000 in.
Outside Diameter (in) : 0.600 in.
For Use with Stud Girdle : No


This time I've mesured the nut and they matches what's above.

I should have done that yesterday......

SS RRR

iTrader: (2)

The taller adjusting nuts will most likely come into contact with your valve covers if they are stock height. If they are the stock ones it's not that big a deal...

mpcv2000

iTrader: (1)

I'm using modified LT4 valve covers but the thing is if you look carefully at the pictures the bottom part of my broken nut is a bit smaller to fit in the pivot of the roller rocker and the new nut don't have that part so they don't sit very good on the pivot.

99Bluz28

iTrader: (35)

Well, I'm sorry to hear the that the part wasn't the one you needed, but it looks like you found the correct one so that's good!

mpcv2000

iTrader: (1)

We'll see tomorrow.

Fastredz28

arp 300-8245 is the right size for the comp cam pro mags

mpcv2000

iTrader: (1)

Very good to know.
I would have order those if I had known.

I've had good luck with ARP products.

Fastredz28

Those are the same poly locks I'm running on my with 7/16 pro mags

mpcv2000

iTrader: (1)

Got the kit today 4600-16 .













They are not the right one again.

I need to have the machined end to fit the 1.6 Roller Rocker grove.

















Like you can see the old one fits into the grove perfectly .












The new one are a too big .












I said *** it I'm not going to wait another week so I grinded it down....











Now it fits perfectly. ( not nice but....)

















Back together.















I've started the motor and it runs perfectly , like before.

I'm very happy I haven't broke anything.

mpcv2000

iTrader: (1)

I ordered the right kit last month and put them on this week so Fastredz28 was right.


I did a camshaft swap this week so timing was perfect to replace the Perma-Lock.