1UZ Non VVTI timing correction kit (for use with 3UZ oil pump).
- Increased pulley size brings back proper tension on the timing belt between bank 1 and crankshaft.
- Stainless Steel Machined adaptor ensures a rigid mounting platform for the bigger idler pulley, and it is a tight tolerance fit to make sure the pulley is true with the belt.
- Bolt on solution. The fan clutch bracket must be clearanced to not hit the now bigger pulley. A plastic cover for the timing belt (on the same side as the pulley) also needs to be clearanced.
- To guarantee proper tension on the timing belt YOU MUST USE THE PROPER TENSIONER ARM in conjunction with this product when using a 3uz oil pump. VVTI tensioner arms have 5mm less travel than the Non VVTI tensioner arms. If you feel your timing marks are not lining up even after installing this kit verify that you have the right tensioner arm and the correct idler on the tensioner arm.
- Keep in mind that any water pump not made exactly to the manufacturer’s specs can cause correlation issues between bank 1 and bank 2. Example: bank 1 will be on time but only bank two is in a more retarded timing position. Incorrect tensioner arm can cause this as well but usually if the issue is the arm the bank two cams are slightly advanced.
- If this is going on an engine where the block and head have been machined combined with a non-standard headgasket thickness, please be aware that this kit will get you very very close to the oem timing marks but you may be slightly off due to variables beyond this kits control.
We would like to give a special thanks to JP Street Performance and Pop
Shop (Silvia Vert) for being a part of the journey to finding the solution to this issue. True
1UZ enthusiasts putting forth their best foot in pushing this engine platform forward.***
With the 1UZ Non VVTI oil pumps no longer being available from Toyota, many
have switched to using the late model 3UZ oil pumps since they are abundant and
easily available. However, this has caused many issues leading to engine failure. Not
because of oiling issues but due to lack of tension on the timing belt.
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