BLKGS4

My 99GS4 just passed the 120K miles marker last month. It still has the original timing belt and water pump.
I order the timing belt, water pump, #1 & #2 idler pulley from Carson Toyota.
I don't have a copy of the service manual. However, I have done lots of research in this forum regarding timing belt and water pump change procedure.
I have found some DIY guide with step by step instruction and photos for LS400. Nothing with similar details for the 2nd Gen GS400.

The following may contains lots of error but it is my vague understanding so far. (do not try to follow the steps in here for your install. The procedure is here to solicite input from club members)
1.remove trany and coolant line to radiator, take off all the bolts and electrical connectors and remove radiator.
2, lose tension by turning the drive belt tensioner pulley with a rachet and take off drive belt,
3, remove crank pulley bolt. There seems to be many different methods discussed in the forum. 3a)The most easy one being placing a breaker bar with 22mm socket on the CR bolt against the ground, crank the starter a few time without starting the car(remove all 8 electrical connectors to each indivual coilpack should do the trick). This should loosen the CR bolt. It sound easy. However, I have reseration regarding the possibility of damage done to the s tarter and the fly wheel.
3b) using old drive belt wrap around the CR pulley and tight the other end to the front stabilizer bar. This will lock the CR pulley in place while using rachet with long extension to take off the Cr pulley. Could this damage the CR pulley?
3c) I have heard many said that using air impact gun will not remove the CR pulley bolt. The success rate is not really high even combine with heating the bolt with a propane torch. I have a craftman compressor and an impact gun that is rated at 500 ft.lbf, I have used it in the past to done timimg belt change on my 95 Acura Integra(CR pulley bolt, 177N.m, 130ft.lbf) and 95 Toyota Camry V6 (CR pulley bolt, 215N.m, 159ft. lbf). I know the lexus CR pulley bolt is rated more than 200ft.lbf. I beleive using air impact gun is the safest route. I done research and found that 1/2" drive, Igersoll rand model 2135, maximum torque of 700ft.lbf and burst torque of 1000ft.lfb. If this tool can remove the CR pulley bolt, then this could be a long term investment for some of the tough bolt in the suspension. I want to change my strut this summer.

For people have done the timing belt change. Which method did you use and why?

4. remove both left and right camshaft pulley cover to expose the timing belt.

5. rotate the CR pulley to line up the timing mark at TDC on the harmonic balancer and the mark on both left and right cams pulley line up. Then rotate the CR pulley 30 Degree instead of 50 degree in the service manual (Thank to VVT-i and gserep1 for pointing it out).
Did anyone point it out to Toyota? Does the latest manual still contain the error?

6. remove CR pulley/Harmonic balancer with a Harmonicbalancer removal tool that may be obtained from Autozone.

7. alternately loosen the 2 bolts that hold the hydraulic tension and remove the tensioner.

8. remove timimg belt.

9. loosen #1 and #2 idler pulley bolts and remove both pulley.

10. installed new idler pulley.

11. remove waterpump and install new one.

12. route new timing belt and install hydraulic tensioner.

13. ensure all the timimg mark on the new belt line up with the mark on the CR pulley and the left and right cams pulley.

14. rotate CR pulley two revolutions and check the timing mark still line up perperly.

15. reinstall everythings.

15. top off coolant and transmission oil.

16. Keep finger cross and start enginer. check for abnormal sound and coolant leak. If none detect and you are done.

I would like to attempt this project as DIY. I am sure the above procedure has lots of steps missing or even some of the them are not in the correct order.
I would appreciate you guys comments to correct my mistake so I can get the job done right next weekend.
Better yet, can someone send me the section of the timimng belt and water pump procedure from the factory service manual.

Thanks in advance.
Ben

BLKGS4

Moderator,
I just realized I post it in the incorrect forum.
Please execuse a newbie mistake and delte this post.
I have reposted it in the engine forum.
Thanks,
Ben