I have the comp cams 95-97 2.2L 1.6 rocker roller arms. and I'm going to be installing them in a week or so, and was wondering about the valve guide. I searched for like an hour with no results. I can't find out if it needs modifying or not.
I'm putting together my entirely built block once it arrives from jbodyperformance at the end of the week, and don't wanna forget something small.
I can't test fit it at the moment, since i don't have a block to test. so, any info would be appreciated.
to my knowlege, no, but if they are the full-roller aluminum rocker arms i am under the assumption, you will need to modify the valve cover in several places to get it to fit... or it might be the 98+ 2200 that needs that mod... someone else should be able to shed more light on that...
No modification to any thing .....except u need the 3/8 studs
http://memimage.cardomain.net/member_images/10/web/778000-778999/778685_1.jpg
Thanks, I've already gotthe studs as i got them from an org member who already had them installed.
You need to read this [URL=95-97 2.2 rocker arm how-to]http://www.ny-jbodies.org/library/engine/2.2/2.2rockerarm.htm[/URL]. It says that even for the compcams 1.6 arms you need to notch the guideplates 1/8" to clear the pushrods.
It would help if the link worked. Sorry, haven't posted here in a while!!
How-to
as long as you are provided with the right rocker studs, which are GM part #: 476530 then the comp cams 1414 rocker kit will work.
i sourced this from the FAQ:
INFO FOR INSTALLING ROLLER ROCKER ARMS:
GM 2.8L/ 3.1L 60 degree V6 ENGINES
GM 2.2L L4 ENGINES (97 –EARLIER ONLY)
WHERE DO I FIND ROLLER ROCKERS FOR MY ENGINE?
COMPETITION CAMS offers MAGNUM Roller Tip Rocker Arms. Available in a 1.52:1 ratio. Part #1413-12 and 1.6:1ratio. #1414-12 These rocker arms are a stifferconstruction rocker arm that have a roller tip that Competition Cams claims a 10-30 hp increase over stock, -due to the increased stiffness and the reduced friction of the roller tip. CRANE CAMS offers a full roller rocker. It is their GOLD RACE Extruded Narrow Body roller rocker. (For 60* v6 and center bolt v8 engines) it is an all aluminum needle bearing roller fulcrum and roller tip rocker. $$$ Very pricey. It is available in a
1.5:1 #25750-12 and 1.6:1 ratio 25759-12 but require cranes replacement nuts #99795 and studs 99148-12. All part numbers with are for the V6 engine, the –12 behind each number indicates quantity of 12. For the four cylinders purchasing two sets (24 rocker arms total) will work out to enough to do 3 engines, (8 rockers an engine) so if three people went together and bought two sets of rockers you will save some money.
WHAT EFFECT DOES A ROLLER ROCKER /DIFFERENT RATIO ROCKER HAVE?
With 1.5:1 or 1.52:1 ratio roller rockers the benefits are around 5 hp. due to reduced friction. With the 1.6:1 ratio rockers your looking at more hp gain because the higher ratio acts like a bigger camshaft by opening the valve more. Thus allowing more air into the engine. Expect around 10-20hp. Remember be conservative these are estimated horsepower gains – depending on application power increases vary. Just because you swapped in these rockers does not guarantee that you gained 20hp.
L4
The cam lift of the 95-97 cams is .288" the amount of valve lift for the different ratios are:
1.5 (stock)= .432" valve lift
1.52 =.4377" valve lift
1.6 =.4608" valve lift
V6
Cam specs for a 92 3.1L
Lobe lift intake .2626"
Lobe lift exhaust .2732"
1.5 (stock)= .3939"int. .4098"exh.
1.52 = .3991"int. .4152"exh.
1.6 = .420"int. .437"exh.
To find valve lift from any cam when using different rocker arms take the known valve lift example .425" and divide by the rocker ratio 1.5. .425/1.5 = .283333333333 this is the cams lobe lift, then take the new ratio example 1.6 and multiply it by the lobe lift. .283"x 1.6 = .453" valve lift. Valve lift – the amount the valve opens due to the combined lift of the cam and mechanical advantage of the rocker arm. Camshaft lobe lift- the amount the camshaft lobe is raised up from its base circle.
WHAT ELSE DO I NEED?
If going with the Comp Cams rockers, The first thing you need to do for this swap is get a set of M10 rocker arm studs from a 2.8 v6, gm part number for these studs is #476530. These studs were sourced from a 89 2.8L Chevy celebrity. At my dealership
(in Canada) they retail for $5.55 Canadian each. V6's will need 12, four cylinders will need 8 of them. The threads on these studs are M10x1.5x9.9/M10x1x18 these are a fully adjustable stud that were used on the v6s*. These studs will compensate for
the different ratio rocker. The stock rocker studs are non-adjustable and are an M10x1.5x9.9/M8x1x.32 the M8 non-adjustable stud will NOT work with these rockers. The Comp Cams rockers come with new 10mm nuts. If using the Crane full roller rockers then you need to get cranes studs 99148-12 -which have an M10x1.5x9.9/ 3/8x24 stud. And cranes nuts #99795. These studs use have the metric threaded end for the cyl head and a standard type 3/8 stud/thread for the rocker arm. Don’t forget you can always check the wrecker’s for the gm studs used for the Comp rockers. I purchased six studs for six bucks from a local wrecker. (For some reason one of my cyl heads had the M8 studs and the other had the M10 ones.) If installing the higher lift 1.6:1 rockers or installing an aftermarket performance cam along with any of the roller rockers you will also need a set of aftermarket high performance valve springs to accommodate the higher lift. Comp Cams #’s 980-12 (springs) 742-12 (spring retainers) and 601-12 (valve locks) Crane Cams #’s 99848-12 (springs) 99915-12 (spring retainers) and 99041-12 (valve locks) These part numbers are for V6 engines only. However with a little searching around, some after market replacements could be found for the L4. The stock springs for the L4 engine WILL work with the 1.6:1 rockers. Nate Stafiej talked to a few companies and found that these springs will be fine for that amount of lift on the 2.2L. He has successfully done the swap and put on a lot of kilometers with no problems. New pushrods are a must, as the old pushrods and rockers have worn specifically to each other and using old pushrods with new rockers can cause premature wear along with voiding the warranty of the rocker arms from the company. Factory (stock type) pushrods will work fine.
*NOTE V6 owners. -Some of the earlier v6’s came with the adjustable M10 studs, some didn’t it depends on year. Check if your engine already is equipped with them before you go and buy a set to find out you didn’t need them.
OTHER MODIFICATIONS?
If installing a set of 1.6 ratio rockers modifications to the pushrod guide plates will have to be made. As the pushrod angle is now altered and will sit closer to the guide plate. An angle grinder with a carbide bit is the easiest and quickest way to do this. -See Nate’s drawing of the pushrod guide plate.
VALVE ADJUSTMENT:
You must find top dead center (TDC) for piston number one. You can do this by removing the spark plug and by hand turning the engine over at the crank pulley until number one is at the top of the cylinder, use a screwdriver in the plug hole to feel
the piston. While cranking the engine over pay attention to the rocker arms, if when the piston is moving up towards TDC and both rocker arms are not moving then the engine is on number one firing position if one of the rockers moves while coming up to TDC then the engine is on number four firing position, and needs to be cranked over one complete revolution.
ADJUSTMENT PROCEDURE FOR L4 ENGINES:
With number one piston on the firing position at TDC install the rockers on the studs,a djust the valves for number one cylinder only. Tighten in the adjusting nuts until all lash is removed. This can be determined by rotating the pushrod while turning in the adjusting nut. Once the play has been removed, turn in the adjusting nut one-half turn to center the lifter plunger. Repeat procedure for each cylinder one at a time while on the firing stroke only.
ADUSTMENT PROCEDURE FOR V6 ENGINES:
With number one piston on the firing position at TDC install the rockers on the studs, the valves that can be adjusted are:
EXHAUST: 1, 2, 3
INTAKE: 1, 5, 6
Tighten in the adjusting nuts until all lash is removed. This can be determined by rotating the pushrod while turning in the adjusting nut. Once the play has been removed, turn in the adjusting nut one-half turn to center the lifter plunger. Now
crank the engine over one complete revolution to number four firing position. These valves can now be adjusted:
EXHAUST: 4, 5, 6
INTAKE: 2, 3, 4
I have done this swap with Comp Cams Magnum roller rockers on my 92 3.1L. I used the 1.52:1 ratio rockers. Nate has installed the 1.6 Comp Cams Magnum roller rockers on his 95 2.2L. Special thanks to Nate with helping research and using his engine as
the test mule for this swap. See his full install instructions below for the 4 cyl’s. 98 and later 2.2L engines use a factory 1.6 ratio pedestal mounted needle bearing roller fulcrum rocker arm. These rocker arms cannot be used on earlier 2.2’s.
DISCLAIMER:
I am not responsible for any damage to engine parts due to improper installation procedures or any damage that could result from this modification to your engine or car.
Thank you and enjoy!
Colin
v6performance@hotmail.com
Sources:
Colin “V6HO” Bulloch
Nate “Cavyboy” Stafiej
C22_T@hotmail.com
www.compcams.com
www.cranecams.com
1.6 Rocker Arm Install For 2.2L –by Nate Stafiej
Tools And Parts Need:
-18mm, 15mm, 13mm deep sockets
-15mm wrench
-A long Phillips or star screwdriver
-8mm and whatnot for to take off valve cover
-New Valve Cover Gasket
-8 studs GM part# 00476530
-8 New GM Stock 2.2l pushrods GM #10198813
-8 Comp. Cam 1.6 roller tipped Rocker arms w/8 Fulcrum washers & 8 nuts
-Comp. Cam red lubricant
-Small grinder (4” disc is all I used) of some sort or good drill bits to elongate pushrod guide plate.
-1 Liter of Motor Oil
-Some medium strength Thread Locker
Installation:
-Disconnect Battery
-Remove Air intake/alternator /plug wire (tape #’s to them so you know where they go back too!)/part of throttle body cover
(plastic piece) and finally valve cover.
-Caution: DO NOT DROP ANYTHING DOWN INTO THE BLOCK----BE CAREFULL!!!
-Now remove all four spark plugs.
-Now starting with cylinder #1, use 15mm wrench, turn the crank pulley (by the 3 little bolts, which are 15mm) till you get Top Dead Center (TDC) of the compression stroke. U will know when u get there, b/c just hold your finger over the spark plug hole and you will get Pssssssst of air blowing by.
-Use a screwdriver by sticking it in the spark plug hole to feel the top of the piston. You will see how when you rotate the pulley, it will get to the top of the stroke and start to come back down again. You want it at the exact TDC. It will take a few times going back and forth to see that you’ve got it TDC. It’s not that hard, don’t worry.
-Now, that you’ve got the valve in the right position, take off the Stover nut (rocker arm nut) and stud for b both the intake & exhaust. But make sure you do one at a time and place them in Ziploc baggies so you know exactly where they go if you ever install them again! Same with pushrods!! Know exactly where each one goes, and which end is up. Very Important!
-When taking off stud, it will be a little tuff, but its ok.
-Once both studs are off pull the pushrod guide plate off.
-Use grinder or drill to elongate it about 1/8” (I did and it was more than enough). See diagram attached.
-Before installing new stud, clean out the stud holes with a paper towel as best you can.
-Now reinstall, plate with new studs. Using a little bit of thread locker on the stud.
-Torque down to 37lb/ft or just free hand it.. with about 70/lb on the 6” ratchet, I did
-Lube up both ends of the new pushrod with motor oil and stick in hole.
-Now lube up the fulcrum washer (the edges and bottom) with red lube and put it on the inside of the rocker arm with the nut on top.
-Tighten nut down until the play on the pushrod starts to get hard to turn with your fingers. Now turn it an additional ½ turn and Viola! Your done one of 8!
-Add some motor oil to the top of the rocker arm where the little hole is.
-Once your done all 8, apply liberally the comp cam lube to the roller tipped part. And also, add some more oil to the top of the rocker arm.
I was a retard, and now I'm permanently banned.
