4AGE 20V Top Overhaul / Full Overhaul

[1JZtezza]

anyone running 288 degree or higher cams for BT???

 

[pcmoddingmy]

i have no white/black smoke coming out from exhaust...but 1 of the piston has no compression....siaoz....today will take out whole engine...sure the piston has pecah...blood out from wallet.... :(

Wow... that's bad bro. How did it happen? The engine was fully rebuilt early this year right? I thought you were running toda pistons?
If no compression, the engine will sound like running on 3 pistons, maybe no smoke also because no combustion on the affected cylinder. Either piston damaged or block warped. I've seen a BT block warped out of shape, leaving empty spaces between the piston and cylinder which causes the compression loss.

 

[KHWONG]

am still using ori piston...but this time wil be together overhaul with 82mm forged piston...

haha .. good to hear that change to forged piston... toda or weslee brand?

hihi..

 

[linkeong]

At kegani there is 1 street car with melted Toda Forged Piston

 

[KHWONG]

melted toda forged piston? fuh.. i think shud be very [powerful set up ..

wat happned to tta engine?

 

[benjaminn78]

melted the toda piston?...would it be lean of fuel??...i will be using USA brand forged piston..dont know wat brand, much more cheaper than toda...hope that is reliable brand...

 

[pcmoddingmy]

Melted toda forget piston sounds like an expensive damage... hehehe. Wrong fuel or wrong tune?

 

[linkeong]

According to Kenny it ran too lean. only 1 piston melted. If not mistaken I think total cost more than RM4k to redo. If anyone drop by kegani can see 1 AE101 with Trueno bodypart white colour, thats the one

 

[glanza]

hi guys im thinking to overhaul my BT myself. but i need some help coz its my first time.. where should i refer to know more about overhaul such as how much torque to apply to tight those bolts? any webs to prefer? or anyone can share with me?

 

[1JZtezza]

here are some interesting things I found out through the net.
Crankshaft:4age,4agz,st and bt all SAME

Con rods:4agz and early 4age same.late 4age and st same,bt on its own.Anyone actually measured the 7Af con-rod??

Pistons:4agz-low comp but ST and BT different(different part number)Anyone measured the actual difference(pin-location,piston height,pent-up piston top and valve clearance).

Oil pumps :all different(4agz and early 4age has 2 parts-drive and driven gear)ST,BT and 7af all different.Initially thought 4agz would have better oil pump but then BT has vvti and its the latest of the 4age.

Cylinder head:part number between ST and BT SAMEAnyone noted any differences???

 

[cybtech]

hi guys im thinking to overhaul my BT myself. but i need some help coz its my first time.. where should i refer to know more about overhaul such as how much torque to apply to tight those bolts? any webs to prefer? or anyone can share with me?

here:
http://home.onthenet.com.au/~paulp/Blacktop/Index.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt1-pp.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt2-ss.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt3-ch.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt4-em.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt5-ig.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt6-lu.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt7-co.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt8-fi.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt9-st.pdf

 

[scottwrx]

here are some interesting things I found out through the net.
Crankshaft:4age,4agz,st and bt all SAME

Con rods:4agz and early 4age same.late 4age and st same,bt on its own.Anyone actually measured the 7Af con-rod??

Pistons:4agz-low comp but ST and BT different(different part number)Anyone measured the actual difference(pin-location,piston height,pent-up piston top and valve clearance).

Oil pumps :all different(4agz and early 4age has 2 parts-drive and driven gear)ST,BT and 7af all different.Initially thought 4agz would have better oil pump but then BT has vvti and its the latest of the 4age.

Cylinder head:part number between ST and BT SAMEAnyone noted any differences???

7AFE conrod is longer than 20V, fatter than bt, but i think about the same as svt..

 

[keisukosan]

here:
http://home.onthenet.com.au/~paulp/Blacktop/Index.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt1-pp.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt2-ss.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt3-ch.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt4-em.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt5-ig.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt6-lu.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt7-co.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt8-fi.pdf
http://home.onthenet.com.au/~paulp/Blacktop/bt9-st.pdf

got st or svt details?

 

[pcmoddingmy]

... and 20V (including BT) doesn't have VVTi. Its only plain VVT.

 

[cybtech]

got st or svt details?

Should be the same, just part number difference.