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hello im gonna keep this short i recently did my timing on my 1999 ls400 not knowing it was an interference engine and i was individually moving the cams and when i try to get the timing right the cams move and when i get it right the belt gets a bubble in it and it’s tight one one side and has a lot of slack on the other i can’t find anyone having this same problem also i did not rotate the 50degrees before taking off the old belt
You want everything at top dead center (TDC) so you can install the new timing belt. Why would you turn the crank 50 degrees past TDC before removing the old belt?
I don't see the bubble you're referring to in your photos. Are you sure it's also timed correctly? There's no markings on that belt in your photos
This is probably one of the best guides for aligning your belt:
EDIT: I had another thought.. How did you install your tensioner? Did you make sure to include the washer so the tensioner pulley can slide freely, torque it to the correct spec (do not over-torque or you'll strip the aluminum block), and then release the tensioner after the belt was installed properly?
11861543[/url]]Why would you turn the crank 50 degrees past TDC before removing the old belt?
The left cam is under spring load at TDC on VVTi engines.
Removing the TB at TDC will cause the cam to jump forward out of position.
Rotating 50 degrees removes the spring tension so the belt can be removed safely and the cam doesn’t move.
The left cam is under spring load at TDC on VVTi engines.
Removing the TB at TDC will cause the cam to jump forward out of position.
Rotating 50 degrees removes the spring tension so the belt can be removed safely and the cam doesn’t move.
The left cam is under spring load at TDC on VVTi engines.
Removing the TB at TDC will cause the cam to jump forward out of position.
Rotating 50 degrees removes the spring tension so the belt can be removed safely and the cam doesn’t move.
and that’s what happened now i don’t know what to do because the right cam will keep jumping
The belt in your pics above does not appear to be new.
Its color is somewhat faded and more importantly there are no markings on it for reference.
i will get a new belt because these pictures are recent and the car has been sitting for about 3 months because i had to go out of town but i get a new timing belt and i still need help on how to get the timing correctly
and how do i know if i’ve bent a valve
The left cam is under spring load at TDC on VVTi engines.
Removing the TB at TDC will cause the cam to jump forward out of position.
Rotating 50 degrees removes the spring tension so the belt can be removed safely and the cam doesn’t move.
is there any videos of the same problem i’m having and how can i get the timing back to the correct position
hello im gonna keep this short i recently did my timing on my 1999 ls400 not knowing it was an interference engine and i was individually moving the cams and when i try to get the timing right the cams move and when i get it right the belt gets a bubble in it and it’s tight one one side and has a lot of slack on the other i can’t find anyone having this same problem also i did not rotate the 50degrees before taking off the old belt
It sounds like you need to install a new belt with timing marks in the correct position.
This will eliminate the slack you have on one side. I'm guessing you put the old belt back on a tooth, or more, off on one side.
Just to be sure everyone is on the same page please explain what you mean by "did my timing".
I'm assuming you're doing a timing belt service, aka replacing the timing belt and possibly other ancillary timing components, but reinstalling the old belt is confusing.
What exactly are you trying to accomplish and what work have you done already?
It sounds like you need to install a new belt with timing marks in the correct position.
This will eliminate the slack you have on one side. I'm guessing you put the old belt back on a tooth, or more, off on one side.
Just to be sure everyone is on the same page please explain what you mean by "did my timing".
I'm assuming you're doing a timing belt service, aka replacing the timing belt and possibly other ancillary timing components, but reinstalling the old belt is confusing.
What exactly are you trying to accomplish and what work have you done already?
i replaced the water pump, idler, and tensioner and it is a new belt, this is the second time taking it apart the first time i thought everything was right i have a video showing all the timing marks are correct after putting on the new belt, then i put it all back together and started it but it was misfiring i left the car for two months because i had to leave and now this is where we are i can’t get the cams back to the right position with out the left side cam jumping
i wish i could send a video of me showing everything
11862044]i bought the timing kit off rock auto it came with water pump tensioner and idlers don’t know the part number but the brand is ultra power
Log in to your Rockauto account and verify it’s the correct belt/kit. It likely is but double check to be absolutely certain.
From here the only real path to success is tearing it down again and re installing the belt.
The markings on the pulleys and motor are only good if the belt is installed with the lines on the belt in the correct position.
It's funny how algorithms work, this popped up in my YouTube feed today.
I've only done 4 or 5 UZ timing belt jobs but Kelvin has likely done over 100.
To the OP-
I'd recommend watching the entire video.
Pay attention to 19:00 to 21:00 and especially what he says at 22:30 to 23:00.
1999 ls400 timing
