Скачать с ютуб A Permanent Spark Plug Thread Repair and Upgrade with Time-Sert® в хорошем качестве

A Permanent Spark Plug Thread Repair and Upgrade with Time-Sert®

Our Honda XR650R motorcycle was a good, low hour find with no abuse. Unfortunately, the previous owner had installed an aftermarket air filter that did not seal properly, which led to valve damage and the need for a top end rebuild. The aluminum cylinder head's spark plug threads were loose as well. Shaky aluminum spark plug threads were repaired with the engine still in the frame prior to discovering the lower compression issue from valve pitting. After the how-to repair shown, we sublet the head to L.A. Sleeve Company along with the cylinder. The complete top-engine rebuild coverage can be found at this Playlist. Replacing the cylinder head casting is a considerable expense, and we were fortunate to find the Time-Sert® products that enable a permanent spark plug thread repair. This approach is a distinct upgrade over cast aluminum alloy spark plug threads. Like motorcycles, modern automotive cylinder heads are also alloy. Time-Sert® makes substantial restoration products for all cylinder head applications, including custom kits for the failure prone spark plug threads on Ford Triton engines. If building a racing or high performance motorcycle or automotive engine with an alloy cylinder head(s), we would upgrade the spark plug threads with Time-Sert® thread inserts. (See "Footnote" below.) Footnote: A viewer expressed concern about cutting threads with the cylinder head in place. There are other Time-Sert spark plug thread insert installations at YouTube with the cylinder head in place. A popular Time-Sert® installation is the repair of Ford Triton engine aluminum spark plug threads with the aluminum head(s) still in place. According to Time Fastener Company (manufacturer of Time-Sert® kits), the tapping and insert installation can be done with the cylinder head in place. The instructions suggest use of heavy grease on the step tap flutes to capture chips, following up with a shop vacuum to draw out any remaining residue: https://www.timesert.com/html/faq.htm.... In this demonstration with the Honda XR650R aluminum head in place, the intake and exhaust valves are closed completely, which is noted in the steps. (Backing off the valve rocker adjusters will assure that the valves are seated.) The piston is positioned just low enough on the compression stroke for the tap to safely clear the piston. With the valves still closed and piston still in this position, a powerful shop vacuum with a tapered nozzle pulls aluminum tap chips and residue from the cylinder and combustion chamber area. The Time-Sert® installation technician can decide whether to remove the cylinder head or whether to use heavy grease on the step tap flutes. When using heavy grease on the step tap flutes, it may be difficult to remove all grease and residue. With the softer aluminum thread material, I chose to run the tap dry and draw out aluminum debris from a dry cylinder and dry combustion chamber with the strong shop vacuum and tapered nozzle. Although many do this procedure for cast iron spark plug threads with the head in place, iron chips or residue would be more abrasive than aluminum. As a precaution for a cast iron cylinder head, I would likely remove the head and install the Time-Sert® on the bench. Clean-up of all tap chips and residue would be done before reinstalling the iron head. Note: After cutting/tapping the insert threads, be certain to remove all debris from the cylinder. I performed the tapping operation with the piston rising on its compression stroke and all valves closed. On this Honda motorcycle engine with a decompression mechanism, the valve lash adjusters must be backed off to provide full seating of the valves before performing this procedure. All valves are seated and the piston is down in the cylinder on the compression stroke, enough to clear the cutting and installation tools. After tapping, the strong shop vacuum with a tapered nozzle pulls debris through the spark plug hole. Make sure all debris is removed. If you like this kind of coverage, see my channel devoted strictly to motorcycles. "Motorcycle Tech and Travel" features dirt, dual-sport and ADV riding routes, technology, in depth how-to, tools, gear, readiness for back country travel, safety tips, motorcycle reviews and the latest news. Subscribe and stay up to date at @MotorcycleTechandTravel . Keep your motorcycle ready for "100 miles from nowhere" rides!