sancarlos1

I am installing a new timing belt as my 93 ls400. It jumped time. the tutorials indicate that the crankshaft belt drive gear has a dot that is at the 6 o'clock position when number 1 cylinder is at top dead center, mine has no "dot" all mine has is a "U" at 12 o'clock and two threaded holes about 10 and 4, I am pretty sure it is at TDC as the rotor is pointing at number one cylinder and the crank pulley timing mark was on zero when i removed the crank pulley. Has anyone experienced this type of drive gear?

sancarlos1

my 93 does not have any markings except the U which is at 12 o'clock

sha4000

iTrader: (1)

A pic would be nice.

aomdedude1

Look harder, there is a notch on the crankshaft gear. If the U is facing 12 o'clock, the notch I am speaking of should line up perfect with the nipple on the oil pump casing. The nipple and notch are circled in red in the picture below. If they are lined up, you are at TDC.

aomdedude1

And here is what the CAM gears should look like.

Left Cam:


Right Cam:


And excerpts from the service manual:

timmy0tool

iTrader: (7)

^ awesome pics! need to add to timing belt guide!

aomdedude1

Thanks man, I have pics of pretty much everything on this car... Timing belt, rear wheel bearings, ECU...lol

Feel free to use them for whatever!~

lateralnw

What happened to the pictures?
I could really do with then atm.
Fitted new timing belt and cam/crank seals on a sc400 1uzfe same as LS400. Won't start and distributor rotor pointing down at tdc or at 12 at tdc not sure which is compression stroke at the moment.
Pictures anyone?
Thanks.

Banshee365

Imageshack nuked linking a while back so all photos linked to there flag out now.

Look over my timing belt tutorial and see if it helps. Remove your crank sprocket and clean thoroughly with a tooth brush on the front face. The mark is small and get's filled with crud over time. https://www.clublexus.com/forums/ls-...-belt-diy.html

lateralnw

Thanks Banshee for the quick reply.
Managed to start the car but it won't idle so I'm guessing I got the cams in the right spot!

Will check out your link.

re links to photos I use https://imgur.com/ and they haven't started charging etc (yet) but I believe you can also attach directly to Club Lexus which is where I thought these photo are stored given there was no picture holder in the post.