2JZGTE rebuild
08-23-13, 08:24 PM
#81
First, did you check for wrist pin movement before reusing your pistons? When I rebuilt my 2JZ, most of the pistons were worn beyond the service limit. The way to tell is to try to move the wrist pin within the piston at room temp. If it moves within the piston, the piston needs to be replaced. The wrist pins should be an interference fit at room temp and require piston heating to install.
Wait I could have sworn the wrist pins in these engines were floating, with bushed small end bore and c clips to retain them in the bore
If I'm wrong I guess they build 2JZ's differently between the years.
Last edited by Reyke; 08-23-13 at 08:28 PM.
08-24-13, 01:56 PM
#83
What's interesting is the whole, " if there is any movement from the pin then it is to be replaced"
I personally prefer exact measurements, some people can feel a thousandths worth of play while others can't, and heating the pistons to 176 F is the same as holding a slightly hot cup of coffee, and if the tolerances are that tight it would be nice if Toyota would give exact numbers, becuase the piston gets hotter than that during the combustion process. I did find a manual that went into a bit more detail. Here's the link:
http://www.97supraturbo.com/Tech.html
The info for the pistons is in the " Engine Repair" PDF and is on 50, 53, and 54
I personally prefer exact measurements, some people can feel a thousandths worth of play while others can't, and heating the pistons to 176 F is the same as holding a slightly hot cup of coffee, and if the tolerances are that tight it would be nice if Toyota would give exact numbers, becuase the piston gets hotter than that during the combustion process. I did find a manual that went into a bit more detail. Here's the link:
http://www.97supraturbo.com/Tech.html
The info for the pistons is in the " Engine Repair" PDF and is on 50, 53, and 54
08-24-13, 08:29 PM
#84
I wanted to finish the build this weekend but I ran into couple of issues. First, the shims that I ordered was missing 1 shim. Curt said he sent it overnight and it supposed to be here Saturday. I reinstalled all the shims and replaced the missing one with smaller spec but it was still tight. Everything is in spec except for that one. Gotta love the TSRM for checking out the clearances. And secondly, one of the cheapie cam gears I bought has bigger hole for the camshaft's dowel pin. Made a video below since I am bored.
Bad cam gear:
Good cam gear :
Left cam gear has bigger dowel pin hole
Used shims
And she's waiting.... waiting.... waiting.. hmp!!!
Bad cam gear:
Good cam gear :
Left cam gear has bigger dowel pin hole
Used shims
And she's waiting.... waiting.... waiting.. hmp!!!
08-25-13, 04:50 AM
#89
What's interesting is the whole, " if there is any movement from the pin then it is to be replaced"
I personally prefer exact measurements, some people can feel a thousandths worth of play while others can't, and heating the pistons to 176 F is the same as holding a slightly hot cup of coffee, and if the tolerances are that tight it would be nice if Toyota would give exact numbers, becuase the piston gets hotter than that during the combustion process. I did find a manual that went into a bit more detail. Here's the link:
http://www.97supraturbo.com/Tech.html
I personally prefer exact measurements, some people can feel a thousandths worth of play while others can't, and heating the pistons to 176 F is the same as holding a slightly hot cup of coffee, and if the tolerances are that tight it would be nice if Toyota would give exact numbers, becuase the piston gets hotter than that during the combustion process. I did find a manual that went into a bit more detail. Here's the link:
http://www.97supraturbo.com/Tech.html