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LQ4 piston to valve clearance

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Old 01-25-2011, 03:36 AM
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Default LQ4 piston to valve clearance

I have A 02 lq4 I did a cam swap and didnt check the ptv clearance, the engine is all together and installed in the car but still have a bunch of work left to get it running. The heads havent been milled and has the stock dished
pistons the cam I used has 230/236 duration @50 611/612 lift and 116 lsa

Do you think I will have problems with ptv clearance?
Old 01-25-2011, 04:50 AM
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Originally Posted by Novaray64
I have A 02 lq4 I did a cam swap and didnt check the ptv clearance, the engine is all together and installed in the car but still have a bunch of work left to get it running. The heads havent been milled and has the stock dished
pistons the cam I used has 230/236 duration @50 611/612 lift and 116 lsa

Do you think I will have problems with ptv clearance?
You ** should ** be ok.
Old 01-25-2011, 01:12 PM
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Ya I wish I would of checked it I had read a post were someone installed a larger cam in a LQ4 and didnt have any problems so I didnt even worry about it when I put the engine together
Old 01-25-2011, 01:14 PM
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Originally Posted by Novaray64
I have A 02 lq4 I did a cam swap and didnt check the ptv clearance, the engine is all together and installed in the car but still have a bunch of work left to get it running. The heads havent been milled and has the stock dished
pistons the cam I used has 230/236 duration @50 611/612 lift and 116 lsa

Do you think I will have problems with ptv clearance?
Tons of room, unless the cam was installed with some stupid amount of advance put into it, or tc set was installed incorrectly!
Old 01-25-2011, 01:41 PM
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Originally Posted by JPH
Tons of room, unless the cam was installed with some stupid amount of advance put into it, or tc set was installed incorrectly!
Thats what I wanted to hear the timming chain is installed correctly so I dont have to worry about that.

What is the largest cam that has been installed in a stock LQ4?
Old 01-27-2011, 03:34 AM
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does the LSA affect PTV clearance?



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