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Chevy small-block v-8<br />
Adapters, Hardware and Breathers Continued<br />
Pushrods<br />
A. 88962074<br />
Oil Baffle Tube<br />
• Pushes easily into most valve covers that have an oil baffle<br />
• Requires breather P/N 25534355; used on ZZ572 engines<br />
B. 25534355<br />
Circle Track Breather<br />
• Special breathers are for circle track<br />
• Valve covers used on circle track and ZZ572 engines<br />
• Chrome breathers are 1-3/8", hose-clamp-style w<strong>it</strong>h the<br />
Bowtie logo on top<br />
• Installs on the left-side of each valve cover<br />
• K<strong>it</strong> includes two breathers<br />
C. 12341993<br />
Push-In Oil Filler Cap<br />
• For valve covers w<strong>it</strong>h 1.22" hole<br />
19131218<br />
Chrome Push-In Breather (not shown)<br />
• 2-3/4" O.D. x 1-1/2" tall w<strong>it</strong>h 3/4" nipple<br />
• Used on our FB385, ZZ4 and 350 engines<br />
• Embossed Bowtie logo; use w<strong>it</strong>h rubber grommet<br />
(P/N 3894337)<br />
3894337<br />
Rubber Grommet, Bowtie Valve Covers<br />
(not shown)<br />
• Has 15/16" I.D. x 17/32" O.D.<br />
• Can be used to plug the oil filler hole in Bowtie valve<br />
covers, or to mount a push-in breather<br />
A<br />
B<br />
Oil Baffle Tube<br />
Circle Track Breather<br />
Small-Block Pushrods<br />
Heavy-Duty Pushrod K<strong>it</strong> (0.100" longer than stock)<br />
Part Number Material Diameter Length Usage Description<br />
Pushrods are that cr<strong>it</strong>ical connection between the camshaft and<br />
the rocker arms. These seemingly innocuous parts play a very<br />
important role in the <strong>com</strong>bustion process. That’s why GM<br />
Performance Parts pushrods are designed for heavy-duty street<br />
and <strong>com</strong>pet<strong>it</strong>ion applications. Two materials are used: 1010<br />
mild steel for high-performance street cars, power boats, and<br />
lim<strong>it</strong>ed <strong>com</strong>pet<strong>it</strong>ion applications, and 4130 chrome moly steel for<br />
maximum-performance racing engines. GM Performance Parts<br />
pushrods are case-hardened for use w<strong>it</strong>h pushrod guideplates.<br />
Pushrods are available in standard and 0.100-inch extended<br />
lengths. The longer pushrods can be used to restore correct<br />
valvetrain geometry when using a high-lift camshaft w<strong>it</strong>h a small<br />
base circle. They are also re<strong>com</strong>mended when longer-than-stock<br />
valves are installed.<br />
12495491 1010 steel 5/16" 7.724" Flat tappet (16) Heavy-duty heat-treated .075" wall, hardened tip inserts; standard length. Use 14044874 for single piece<br />
14044874 1010 steel 5/16" 7.724" Flat tappet (1) Heavy-duty heat-treated .075" wall, hardened tip inserts; standard length.<br />
12371057 1010 steel 5/16" 7.824" Flat tappet (16) Heavy-duty heat-treated .075" wall, hardened tip inserts. +.100 long; use 366277 for single piece<br />
366277 1010 steel 5/16" 7.824" Flat tappet (1) Heavy-duty heat-treated .075" wall, hardened tip inserts. +.100 long<br />
10046173 1010 steel 5/16" 7.122" Hyd. roller (1) Heavy-duty heat-treated .060" wall, standard length; for use in early ZZ-series engines w<strong>it</strong>h guideplates<br />
12371041 1010 steel 5/16" 7.122" Hyd. roller (16) Heavy-duty .060" wall, standard length; for use in 2nd design ZZ-series engines w<strong>it</strong>hout guideplates<br />
Use P/N 10241740 for single piece<br />
10241740 1010 steel 5/16" 7.122" Hyd. roller (1) Heavy-duty .060" wall, standard length; for use in 2nd design ZZ-series engines w<strong>it</strong>hout guideplates<br />
10134309 4130 steel 5/16" 7.896" Special (1) Chromemoly one-piece design racing pushrod<br />
Chevy small-block v-8<br />
D. 12341986<br />
Hold-Down Clamps<br />
• Clamps to minimize distortion of valve cover flanges on<br />
1955-1986 Chevrolet Small-Block V-8 and 90° V-6 engines<br />
• 4 clamps per package; order 2 per engine<br />
E. 14082321<br />
Spring Bar Retainer<br />
• Special steel retainers prevent oil leaks<br />
• Use under the valve cover bolts<br />
• Distribute clamping force over a large area and prevent<br />
deformation of the flanges<br />
• Narrow retainers are engineered to f<strong>it</strong> pre-1986 engines<br />
w<strong>it</strong>h perimeter-style hold downs<br />
NOTE: Package contains 1 retainer. Order 4 per valve cover.<br />
F. 14044820<br />
Spring Bar Retainer, Chrome-Plated<br />
• Similar to retainer P/N 14082321 described above<br />
• Chrome-plated to match chrome valve covers<br />
NOTE: Package contains 1 retainer. Order 4 per valve cover.<br />
3933964<br />
Valve Cover Gasket (not shown)<br />
• Cork-type gasket<br />
• F<strong>it</strong>s all valve covers w<strong>it</strong>h perimeter hold-down bolts<br />
• 1 gasket per package<br />
10046089<br />
Valve Cover Gasket (not shown)<br />
• For ’86 and newer center hold down design valve covers<br />
C<br />
E<br />
Push-In Oil Filler Cap<br />
Spring Bar Retainer<br />
D<br />
Hold-Down Clamps<br />
Small-Block Guideplates<br />
Part Number Description technical Notes<br />
3973418 Pushrod guideplate (cast-iron head) For use w<strong>it</strong>h production and Bowtie cast-iron cylinder heads w<strong>it</strong>h screw-in studs. Can also be used w<strong>it</strong>h aluminum Bowtie<br />
V-6 head. Should not be used w<strong>it</strong>h self-aligning rockers. Pushrod slots are 0.325". For 90° V-6, use on cylinders 1, 2, 5 and 6;<br />
guideplate must be ground to clear valve cover hold-down bolts. Four required per head.<br />
14011051 Pushrod guideplate (aluminum Bowtie head) Hardened steel guideplate has the correct pushrod spacing for aluminum Bowtie heads. Should not be used w<strong>it</strong>h<br />
self-aligning rockers. Pushrod slots are 0.365". Four required per head.<br />
10111771 Pushrod guideplate (Corvette aluminum head) Non-hardened guideplate for use w<strong>it</strong>h Corvette aluminum cylinder head assembly P/N 12556463 and 350 HO engine<br />
assembly P/N 10185072. Four required per head.<br />
Rocker Arm Studs<br />
12495497<br />
Screw-In Rocker Stud K<strong>it</strong> (3/8", not shown)<br />
• 3/8" studs f<strong>it</strong> all high-performance Small-Block V-8 and 90°<br />
V-6 Chevrolet cylinder heads machined for screw-in studs<br />
and using guideplates<br />
• Won’t pull out of their bosses under high load<br />
• K<strong>it</strong> includes 16 pieces, for single stud usage, use P/N 10168410<br />
• Lower thread section is 7/16-14<br />
NOTE: Screw-in studs can be installed on heads originally<br />
equipped w<strong>it</strong>h pressed studs by machining and tapping the<br />
stud bosses.<br />
G. 12371058<br />
Screw-In Rocker Stud K<strong>it</strong> (LT1, LT4 style)<br />
• 3/8" studs are used on all late-model LT1, LT4, and any<br />
head not using a pushrod guideplate<br />
• K<strong>it</strong> includes 16 pieces; for single stud usage, use<br />
P/N 12552126<br />
• Lower thread section is 7/16-14<br />
10185043<br />
Valve Cover Gasket, Splayed Valve Head<br />
(not shown)<br />
• Used w<strong>it</strong>h on splayed-valve V-8 cylinder head<br />
P/N 24502517<br />
• K<strong>it</strong> includes 2 gaskets<br />
F<br />
Spring Bar Retainer, Chrome-Plated<br />
Screw-In Rocker Stud K<strong>it</strong> (LT1, LT4 style)<br />
G<br />
3921912<br />
Screw-In Rocker Stud (7/16", Big-Block style)<br />
(not shown)<br />
• Beefy 7/16" Big-Block V-8 rocker studs<br />
• Improve valvetrain stabil<strong>it</strong>y of any Small-Block V-8 or 90°<br />
V-6 racing engine by minimizing rocker stud flex<br />
• F<strong>it</strong>s any Small-Block V-8 or 90° V-6 cylinder head machined<br />
for screw-in studs<br />
• Requires rocker arm for 7/16" stud<br />
166 Buy online at www.gmperformanceparts.<strong>com</strong><br />
Available for purchase online at<br />
gmperformanceparts.<strong>com</strong><br />
167
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