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Thread: Which parts in 4AGZE are low comp.

  1. #1
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    Default Which parts in 4AGZE are low comp.


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    Hi Guys

    Sprinter hasn't moved for a few years now, sold my dirty nissan s15, time to get the sprinter back on the road.

    I had big plans for a 4AGTE but I have decided to just get her going asap and not take the time to build it better.

    I have a very tired 4AGE with a flogged keyway in the Crank
    A decent condition 4AGZE (mainly just engine, no manifolds or supercharger)

    My question is, which part of the 4AGZE is low compression, head? pistons? or both?

    Would it work for me to rebuild this engine, and use the head from my 100kw 4AGE and take advantage of the 4AGZE 7 rib block, crank, pistons, rods , and better oil flow.
    I would be using my existing Manifolds and everything.

    Would this be a good high compression engine with a TRD metal 0.5mm gasket? or are the 4AGZE pistons low compression, meaning I have to use the 4AGE ones, and will they fit on the 4AGZE rods?
    Would the 4AGZE pistons clear the 4AGE head with a thin gasket?

    Also while I am at it, anyone know where to get 0.5mm TRD 4AGE gaskets cheaply? also in need of a new Distributer, the sensors inside where used elsewhere, so I have the cap, just need the sensors inside really, so it can be FWD or RWD shaped.

    Thanks in advance for any help
    Justin
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    jusdrifn86@gmail.

    If anyone has the time to chat about this on the phone it would be much appreciated, PM me your number and I can call.
    I started the ball rolling...

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    Senior Member Matt-AE86's Avatar
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    Yer, the pistons are the high compression part. Others will fill you in with more info.

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    Senior Member Hen may possibly be a nut's Avatar
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    The only difference between GZE and GE of a given year is pistons, rings and cam covers. So it's just the pistons which dictate CR.

    However early GEs used smaller big and small end bearings. So if your existing GE is one of them (these included original AE86 4AGEs) then your pistons wont fit on the ZE rods. Pick up a set of later GE pistons and everything will fit fine.

    Also there are basically 2 types of distributor internals, bigport with a 4 tooth wheel and a 24?? tooth wheel, and smallport, 20V etc with 2 single tooth wheels and a 24 tooth wheel. Find whichever you need and go for it. Though I'm unsure if 20V dizzy or internals will physically fit.

    Hen

    PS, jsut noticed you mentioned you have a 100kw 4AGE now, in that case your pistons will swap fine.

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    Thanks for your help Hen, answers a lot of questions..
    I now have to be 100% on the fact that my 4AGE is definitely the 100kw version..

    Guess I will do some work on it this Friday and find out the hard way.

    If I was just going to use the same 4age ( I guess it isnt that tired) and just swap the crankshaft for ease of work out of the ZE would this work? if the engine is 100kw so the Big Ends are the right size?

    With regard to the dizzy, My AE82 was having problems and I narrowed it down to the dizzy sensors, the rwd dizzy off the sprinter didnt fit on obviously so i swapped the sensors out and the AE86 twin cam no runs sweet as, so they are the internals i need to replace...
    I started the ball rolling...

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  • #5
    Senior Member sun_moon's Avatar
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    look at port sizes to know if its 100kw or not justin.
    yo. i got fans across the country. Dongsoo Kim is who they feelin' , last time you had a fan, it was spinnin' from tha ceiling ! haha.

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    do smallport and bigport have the same combustion chamber size ?
    ive only played with bigport heads, i think from memory its 39cc for bigport.

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    Senior Member gumbie's Avatar
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    I use a similar setup, Bigport head and 4agze block/interanls, if you went this route, i would not recommend using a trd 0.5 head gasket as your compression gets abit to high, I run a standard gasket and my comp ratio is 10:5:1. Goes hard as chippies
    Last edited by gumbie; 6th April 2009 at 10:39 PM.

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    Senior Member sun_moon's Avatar
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    11:1 and above is win compression !
    yo. i got fans across the country. Dongsoo Kim is who they feelin' , last time you had a fan, it was spinnin' from tha ceiling ! haha.

    Quote Originally Posted by rollin33 View Post
    Sun_moon that?s badass name. you?re a loser go watch the sunset with your boyfriend.


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    Moderator Sam-Q's Avatar
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    both 16v heads are meant to have the same size chambers, try here for a 0.5mm gasket

    http://www.greenline.jp/

    I suggest just a 0.8mm gasket though, you are talking about turning it into an atmo engine right?
    My website: SQ Engineering - 4AGE and 3SGE upgrade/replacement parts

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    Please e-mail to contact me instead of sending a private message on here.

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    Senior Member gumbie's Avatar
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    Quote Originally Posted by sun_moon View Post
    11:1 and above is win compression !
    Thats abit high lol, bring on blown head gaskets

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