74 dt250. 2 No. but here is what's on the top of the piston. Decoding 327 Casting Numbers ; 327 Suffix Codes ; Writer Bio. 1 Posts . Questions from a first time poster; I have a set of 4 Mahle pistons that were bought 25-27 years ago and have been in storage ever since. 29. (5) Fit the piston and connecting rod together such that their front marks are on the same side. 7 l o l l l of o l l e e s P ROFESSIONAL Y s As the leader in LS-1 forged pistons, Wiseco pulled out all the stops when designing the LS Series. There is also a difference between the pistons of these two engines, the 4.8L has a flat dome and the 5.3L has a cup dome. On small pistons, mostly, only the measurement group and the nominal diameter are marked. Using a small screwdriver, install a new snap ring at one end of the piston pin hole. Top of piston identification marks #10. Ideally, you want a ring set that provides excellent cylinder sealing, good oil control, and minimum frictional drag. Hi, guys I have my 72 XS2 tore down. 140029 Small Block V8 1980-1984 350, 2 bolt. piston to be fi tted tighter within the bore than a non-coated piston. All Wiseco pistons are forged from high silicon, low expansion aluminum alloy. Cause - A four corner seizure is caused when the piston expands faster than the cylinder and the clearance between the piston and cylinder is reduced. Some Wiseco automotive pistons, such as the Sport Compact or LS series pistons, include a marking that indicates the front of the engine. See page 64 for a listing of K1 Technologies Rods & Crankshafts. This offers a superior strength, weight reduction, improved heat transfer and longer life. Ok so im doing a top end rebuild of a Dt125 1986 lc. References. Discussion in 'Engines' started by lasors, Feb 7, 2013. 14010202 Small Block V8 1980-1984 305, 2 bolt. Wiseco Piston Identification. A one-piece oil control ring is used in the third groove. Close this window to stay here or choose another country to see vehicles and services specific to your location. Wiseco ring types are not interchangeable with each other (ie, CD is not interchangeable with KD ring set). Remove the piston—see details on the “PISTON FITTING” poster. It is the responsibility, of the customer, to check State and Federal emission regulations. The original box is gone. EXAMPLE PART. - Engineering Excellence - In-House Forging Wiseco is your source for off-the-shelf performance pistons! Another form of identification is orange or yellow paint markings on the 289 Hi-Po’s crankshaft counterweights. Piston identification. Hello, I'm trying to identify a set of pistons I have for a V8 and I hope you can help. There are no 74" bore pistons that are made for a 61" stroke (at least not that I have ever found), which leaves you stuck running normal 74" pistons. I'm needing to bore and would like to identify what piston I have based on the selection of markings. < Previous Thread | Next Thread > lasors New Member. As for ring location on piston the top ring is the chromed and the middle ring is darker in color. Ultimately it can be thought of as piston to head clearance. Pistons and rings are available for purchase at: www.midwestsupercub,net or by calling (563)659-5276 Look for Midwest Super Cub at your next pulling event and … In this video I show and explain the easiest way to install your piston rings with out breaking them. Select Post; Deselect Post; Link to Post; Member. Sometimes referred to as squish, quench is responsible for forcing the air-fuel mixture into the combustion chamber area near the spark plug. They are attached to 3.5/3.9 rods (HRC1037) and the only identifying marks I can see on the insides are AE Hepolite 18386. 4 Timing belt side Production date MAHLE Piston Identification Marks. However when ever you see scoring, it's a good idea to find the source so that it doesn't develop into a full blown seizure. You are currently viewing Chevrolet.com (United States). Search by Year/Make/Model to find all Wiseco Products. Another thing that we noticed is that the 4.8L pistons from OE had a pink ink mark in the pin area and the 5.3L had a green mark. Fire and Compression Ring Identification. Joined Feb 17, 2009 Messages 498 Likes 0. ArmorGlide is being applied to selected pistons. Chevrolet Performance offers Small Block Engine Pistons, Piston Rings, vehicle upgrades and other components for your engine build or project car. Piston Identification Size Feb 19, 2010 13:47:11 GMT -5 . The 2 piston rings i have are exactly the same, aside from th fact that one is slightly thicker. The only problem with that is due to the difference in wrist pin location and stroke between them, the 74" piston will be nearly a 1/4" lower at TDC than a 61" piston. Powerful search tool to find any wiseco product made for any application. The second rind is designed to wipe the oil down as the piston moves down in the cylinder, if I remember correctly. The front of the engine typically means the cam chain or cam belt / water pump end of the engine. Beware of any seller that says a piston fits bikes of different capacities. These markings guarantee Quality MAHLE Pistons (on top of piston): Maker's quality sign; Piston diameter in mm Measured across the greatest skirt diameter (at the bottom of the skirt, perpendicular to the pin axis). Over time the cilinder will wear out and to ensure keeping a proper Fit, you will install a piston! Or removing the pistons, conrod caps, etc superior strength, weight reduction, improved heat transfer longer... Screwdriver, install a new snap ring at one end of the piston cylinder. Ring types are not interchangeable with each other ( ie, CD is not interchangeable with KD set! 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