In the old days of the Gen I small-block and its distributor-driven pump, prelubing was a simple matter of inserting a drill-operated tool into the distributor hole. Unfortunately, the design of the LS oil pump does not allow an easy way to do this. These vary by vehicle, but the two fluids you unquestionably will have to refill are coolant and engine oil.īecause the oil galleries of a newly-assembled LS are dry of oil, all engines should ideally be “prelubed” using special equipment. Once you’re certain everything checks out, use factory-specified procedures to replenish and bleed all fluids (as necessary). Carefully examine every inch of the engine bay to make sure you haven’t missed any electrical plugs or forgotten to reconnect any hoses. With your engine successfully rein-stalled into the vehicle, it’s time to stop and double-check your work. Use all fastener torque specifications specified in your GM service manual and have someone else helping you throughout the process-engines and vehicles (along with their chassis components) are heavy and can do serious damage if not handled correctly! There isn’t much to say here except to use patience, take all appropriate safety pre-cautions, and refer to any photos and notes you took during engine removal to sort out what goes where. Reinstallation of your engine will take some time and care, but one bit of good news is that it shouldn’t be nearly as messy as during removal, since you won’t be draining any fluids! In addition to the wiring harness, exhaust piping, cooling system hoses, fuel lines, emissions hoses, and all other engine-related systems, be sure to reconnect any brake, power steering, and A/C lines you may have disconnected during engine removal.Īs with engine removal, reinstallation of your LS engine into your vehicle is beyond the scope of this book. This may be easiest with the engine on its removable subframe (if applicable), or you may have to wait until the engine is already under the hood. We finished Chapter 8 on an open-ended note, stating that you would need to reinstall all remaining engine accessories (like the exhaust manifolds and water pump) either while the engine was still on its stand or at the appropriate time during reinstallation. You can copy and paste this link to share: SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. For a comprehensive guide on this entire subject you can visit this link: LEARN MORE ABOUT THIS BOOK HERE This Tech Tip is From the Full Book, HOW TO REBUILD GM LS-SERIES ENGINES. Congratulations on a job well done-you’ve got a newly rebuilt LS sitting on an engine stand! Though the work of this book is basically over, we wanted to leave you with some final information that will help ensure your engine enjoys a trouble-free reinstallation and startup, followed by a long useful life.
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