TM  10-3930-643-34 GENERAL  SUPPORT  ENGINE,  FUEL, 13-2. Cylinder  Head  Assembly CLEANING/INSPECTION/ASSEMBLY EXHAUST  AND  COOLING  MAINTENANCE. with Valves. 13. Chill new 0.15 inch oversize inserts (4) and seats (3) and insert driver tool in dry ice for 30 minutes before installing. Chilling will prevent metal  scraping  of counter- bore. This  will  ensure  maximum  mating surfaces. 14. Coat six inserts (4) and seat with Loctite 277. 15. Aline six inserts (4) and seats to avoid cocking. of (3) (3) 16. Using a insert driver tool and arbor press, install new inserts (4) and seats (3). Exert an even pressure of 500 lb-ft for five seconds. 17. Inspect all six inserts (4) and seats (3) to ensure that they are properly seated. 18. Inspect all other parts. Refer to paragraph 2-9. NOTE Return M10A Forklift to original equipment  condition. (Sheet 6 of 6) END OF TASK 13-13