change valve spring with crank pinned - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

DCC1464 · 06-03-2017, 11:46 AM

hey, so im about to change my BTR springs (due to clocking about 25k on them) and was wondering if anyone knows a good method to change the springs and tighten down the rockers with out pulling the timing chain cover. i know i can get the springs by doing the TDC method with a straw but not sure about using this method to torque my rockers. any ideas? i dont wana pull the timing chain cover cause i have pinned the crank and dont wana deal with that.

Russell James · 06-03-2017, 11:53 AM

I've never heard of pulling the balancer and timing cover to tq the rockers. Why would you do that?

The service manual has the procedure to tq the rockers.

TDC #1 compression stroke.
Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).

Rotate the crankshaft 360 degrees.

Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).

Have your spark plugs out so it's easy to rotate during your valve spring change and torquing.

Synner · 06-03-2017, 11:57 AM

You pull a spark plug and find TDC based on piston position of cylinder #1.

Bo White · 06-03-2017, 11:59 AM

^^^^this^^^^
Ive got 27k on mine. Im not concerned lol. No plans in the near future of changing them.

gmcvt · 06-03-2017, 12:10 PM

I don't know what kind of rockers you are using but I think I would be more likely to give them a quick check before I would be worried about the springs at this point. The factory units seem to be as good a choice as most options out there but have seen some folks who had an issue with them occasionally spitting bearings. Sorry, bit of a rabbit trail.

DCC1464 · 06-03-2017, 12:13 PM

Quote:

Originally Posted by Russell James

I've never heard of pulling the balancer and timing cover to tq the rockers. Why would you do that?

The service manual has the procedure to tq the rockers.

TDC #1 compression stroke.
Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).

Rotate the crankshaft 360 degrees.

Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).

Have your spark plugs out so it's easy to rotate during your valve spring change and torquing.

thanks this is what i was looking for, only time i did the springs and rockers was when i did the cam shaft and use the timing gears for reference of the cam base lobes.

DCC1464 · 06-03-2017, 12:16 PM

Quote:

Originally Posted by Bo White

^^^^this^^^^
Ive got 27k on mine. Im not concerned lol. No plans in the near future of changing them.

im going in mainly cause i have a loud sewing machine noise and i just used the recommend pushrods from the company that spec'ed my cam. im gona measure for pushrod this time. and might as well change the springs while im in there.

DCC1464 · 06-03-2017, 12:40 PM

Quote:

Originally Posted by gmcvt

I don't know what kind of rockers you are using but I think I would be more likely to give them a quick check before I would be worried about the springs at this point. The factory units seem to be as good a choice as most options out there but have seen some folks who had an issue with them occasionally spitting bearings. Sorry, bit of a rabbit trail.

I have stock rockers with the trunion upgrade, and btr .650 springs

gmcvt · 06-03-2017, 01:54 PM

Which trunion upgrade did you do?

Quote:

Originally Posted by DCC1464

I have stock rockers with the trunion upgrade, and btr .650 springs

DCC1464 · 06-03-2017, 02:37 PM

comp cams

Bo White · 06-03-2017, 04:01 PM

Im still running stock rockers. 122K miles

InFiD3ViL · 06-03-2017, 04:41 PM

Quote:

Originally Posted by Bo White

Im still running stock rockers. 122K miles

On stock trunnions? Pretty sure that's what you meant by that, but just making sure lol.

Bo White · 06-03-2017, 05:01 PM

Yes

0331Marine · 06-03-2017, 05:58 PM

Sewing machine sound is an LS trademark lol

06-03-2017, 11:59 AM	#4
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	^^^^this^^^^ Ive got 27k on mine. Im not concerned lol. No plans in the near future of changing them. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

06-03-2017, 12:10 PM	#5
gmcvt Drives: 2019 Camaro 1SS A10 Join Date: Nov 2015 Location: Tn Posts: 465	I don't know what kind of rockers you are using but I think I would be more likely to give them a quick check before I would be worried about the springs at this point. The factory units seem to be as good a choice as most options out there but have seen some folks who had an issue with them occasionally spitting bearings. Sorry, bit of a rabbit trail. __________________ "Jesus said to them: I am the way, the truth and the life and no one comes to the Father except through me" John 14:6 2020 Mustang GT M6 2019 Camaro 1SS A10 E85/Pray tuned & ported IM/TB.SOLD 2018 Mustang GT A10 Kooks Lt's, E85 & Lund tuneSOLD 2010 Camaro 2SS/RS M6 Silver- CAI, Bo-body, VRSP-2 cam, Kooks 1 7/8 Lt's w/cats, Magnaflow street CB(15089), QTP ovals, Elite can, Vengeance Racing tune. SOLD

06-03-2017, 02:37 PM	#10
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	comp cams __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread

06-03-2017, 04:01 PM	#11
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Im still running stock rockers. 122K miles __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

06-03-2017, 05:01 PM	#13
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Yes __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

06-03-2017, 11:46 AM	#1
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	change valve spring with crank pinned hey, so im about to change my BTR springs (due to clocking about 25k on them) and was wondering if anyone knows a good method to change the springs and tighten down the rockers with out pulling the timing chain cover. i know i can get the springs by doing the TDC method with a straw but not sure about using this method to torque my rockers. any ideas? i dont wana pull the timing chain cover cause i have pinned the crank and dont wana deal with that. __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread

06-03-2017, 11:53 AM	#2
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	I've never heard of pulling the balancer and timing cover to tq the rockers. Why would you do that? The service manual has the procedure to tq the rockers. TDC #1 compression stroke. Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft). Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft). Rotate the crankshaft 360 degrees. Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft). Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft). Have your spark plugs out so it's easy to rotate during your valve spring change and torquing.

06-03-2017, 11:57 AM	#3
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,544	You pull a spark plug and find TDC based on piston position of cylinder #1.

06-03-2017, 05:58 PM	#14
0331Marine Drives: 2012 SS/RS MN6 Join Date: Mar 2016 Location: Covington Ga Posts: 783	Sewing machine sound is an LS trademark lol