4AGE 20V Top Overhaul / Full Overhaul

[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.

 

[glanza]

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

thanks a lot cybtech!

 

[keisukosan]

Should be the same, just part number difference.

thanks for ur info...

 

[1JZtezza]

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

You are right;but my point was(both VVT and VVTi) depends on the oil pressure to activate its mechanism and 7af conversions should use Bt oil pump.Just wondered if anyone used a high cam with VVT and how it performed.

 

[selwyn]

wah.. this racun kuat kuat one..... sifu 2o2r,

got a noob question to ask u lah.. coz my 7A fe wanna kahwin with my 4a GE liao.. what is the reccomended gasket ar? i will be using bt piston with bt head.... according to bro howard, he is using 0.5mm get around 12 for compression, but it is too high to be driven smoothly, i prefer to go back to standard bt compression of around 11 to 11.5
is 0.7 ok? or 1mm? i know there is a way to claculate but i couldnt find it so have to ask u sifu loh...

another noob question, northern got ppl do engine balancing? it got around how much?

bro.. your 7A want to kahwin to 16v or 20v? i can offer some practical ideas as we have tried numerous times. 16v and 20v got big differences in our experience...

 

[scottwrx]

bro.. your 7A want to kahwin to 16v or 20v? i can offer some practical ideas as we have tried numerous times. 16v and 20v got big differences in our experience...

i m planning to kahwin with 20v... mind sharing some more information on 7age 20v? thanx a million..

 

[glanza]

guys, where to get full overhaul set in cheap price? any recommended shop?

 

[cybtech]

7age 20V i think the timing belt gonna use different, not toyota's timing belt,
pls correct me if i'm wrong, can search old forums/threads

 

[cruiser78]

Anybody have standard VVT intake cam pulley for BT? Mine already broken. sound really noisy. Asked Kenny earlier but he said no stock... anyone please?

 

[pcmoddingmy]

I think I might have one back in Ipoh, but chopshops should have them as well. But I heard after changing to used VVT pulley, the sound will come back in 2-3 months or earlier. There's a foreman who can rebuild VVT pulley for about RM500 or you can also PM sifu chinozie.

 

[hon_cs]

wow dint know rebuild cost so much. then how much for chop shop pulley?