Block Components

Chevy Small-Block V8 | Block Components


10121044	Rear Oil Seal
This rear oil seal is for V6 and V8 Chevrolets with two-piece design. P/N 10121044 seal is designed to tolerate higher operating temperatures and has more face pressure than other seals for superior leak protection. This seal is used by most NASCAR teams.



10134368	Main Bearing Cap, #1
This 2.45" dia. main bearing cap is made from 8620 steel and is used on Chevrolet V8 aluminum blocks P/N 24502495, P/N 10185075, and on Chevrolet V6/90º aluminum blocks P/N 10134371. NOTE: These bearing caps will not work on cast iron blocks.



10134369	Main Bearing Cap, Intermediate
These 2.45" dia. main bearing caps are splayed and are made from 8620 steel. They are used on Chevrolet V8 aluminum blocks P/N 24502495, P/N 10185075, and on Chevrolet V6/90o aluminum blocks P/N 10134371.
Technical Notes: These bearing caps will not work on cast iron blocks.


10185067	Welch Plug
Used on Chevrolet V8 aluminum blocks P/N 24502495, P/N 10134400, P/N 10185075, and on Chevrolet V6/90 degree aluminum blocks P/N 10134371 and P/N 10185051.
Technical Notes: These plugs are threaded with o-ring seal.


12342089	Timing Cover - Chrome (Licensed part by GM)
For use on Chevrolet small-block V8 1995-99 first design and V6/90º engines. It is a direct replacement for all late model small-block and V6/90º front covers that use a bolt-on timing pointer. Replacement oil-seal: P/N 10243247.
Technical Notes: These timing covers, engineered to GM standards for reliable installation, are stamped with the distinctive Chevrolet logo. They are supplied with GM production oil seals installed.


12363238	Universal Engine Lift Bracket Kit
These engine lift brackets are designed to bolt to the ends of each cylinder head to remove an engine from the vehicle. Kit includes two brackets and two 7/16" bolts.
Technical Notes: These brackets are made from .020" thick steel, and have an .88" x 1.00" hook slot. They are painted with epoxy coating and use either 3/8" or 7/16" mounting bolts (use grade 5 or higher bolts).


12480004	Cylinder Sleeve (Standard)
These sleeves are for new design aluminum V8 and V6 90 blocks P/N 10134400, 10134351, 10134371.
Technical Notes: This sleeve has a 3.980" I.D. and can be bored to 4.125".


12480018	Plugs, Oil Galley
These are replacement oil galley plugs for all GM aluminum blocks. They are size AN-6.



12480032	Cylinder Sleeve (Standard Tall Deck)
This sleeve is the replacement for aluminum "tall deck" block P/N 24502495 only. This iron sleeve I.D. bore is 4.120" and finish bores to 4.125".



12495500	Engine Freeze Plug and Dowel Pin Kit
When rebuilding your engine use this kit for all small block V8 (except RPO LS1) or V6 90º Chevrolet engines. This kit includes eight brass freeze plugs, one cam plug, five oil hole plugs, four head dowel pins, and one camshaft dowel pin.



12562818	Timing Chain Cover
This new design cover is used on all ZZ4 crate engines, and will bolt to any small-block Chevrolet engine from 1995 through current model except LT1, LT4 and LS1.
Technical Notes: Use RTV sealant to seal new timing chain cover. Not recommended for use with short leg water pump because there is no clearance between back of pump and the cover. Use chrome cover P/N 12342089 or early model sheet metal cover P/N 12523317 for short water pump application.


14011052	Billet Steel Two-Bolt Cap
This steel main cap replaces the grey iron front bearing cap on small-block and V6/90º engines with 2.45" main bearings. It is machined from 1010 cold drawn steel, and it uses the same bolts and studs as a production front bearing cap.
Technical Notes: The block must be align bored after installing a replacement front bearing cap.


14011072	Billet Steel Four-Bolt Cap
These billet main bearing caps are machined from 1010 cold drawn steel. The outer bolt holes angle outward toward the oil pan rails. This splayed bolt design improves reliability in highly stressed racing engines by tying the cap to the strongest part of the block. It also reduces distortion of the main bearing bores by increasing the cap's resistance to closing up under high loads. Billet steel main caps are designed for blocks with 2.45" main bearings. The Chevy Bow Tie is laser etched on top of the cap.
Technical Notes: See the Chevy Power manual for machining instructions when installing splayed bolt caps on blocks originally equipped with two-bolt or production-type four-bolt caps.


3826504	Welch Plug (15/8" Brass)
Whether you call them "welch plugs, "freeze plugs," or "soft plugs," their job is still the same-to keep the water in the water jacket! Welch plugs are available in three different materials to suit various applications. Bow Tie aluminum blocks require aluminum plugs; either steel or brass plugs can be installed in cast iron blocks. Brass is more corrosion resistant than steel, and is recommended for marine applications.



3932482	Nodular Iron Four-Bolt Cap
This nodular iron cap (casting number 2482) is stronger than the grey iron caps installed on most production small-blocks with 2.45" main bearings. It can be retrofitted on blocks originally produced with two-bolt mains, or used to upgrade a four-bolt block for racing. These caps are used on cylinder case 10185047.
Technical Notes: This is a semi-finished cap with four parallel bolt holes; the ends of the cap must be machined to register it in the block. The block must be align bored after installing replacement caps.


3991435	Timing Pointer
This steel sheet metal timing pointer is a bolt-on for 6 3/4 and 7" balancers for small-block Chevrolet engines. "Not chromed."



3991436	Timing Pointer
This steel sheet metal timing pointer is a bolt-on for 8" balancers for small-block Chevrolet engines. "Not chromed."



14011043	Cylinder Sleeve (Standard)
These replacement 4.00" diameter centrifugally cast cylinder liners can be installed in aluminum Bow Tie small-block and V6/90� engines. They are available in standard and two oversize diameters.
Technical Notes: These sleeves are for early design Chevrolet V8 block with casting #366299 and V6 90 P/N 14011069. They will not fit current V8 and V6 cases P/N 10134399, 10134400, 10134351, 10134371, 10185075, or 24502495.