need help combining 4AC block with 4AG head

Wataru Joined: 25 Mar 2007 Posts: 51

i currently have the following a 4Age head bluetop and a 4AC block lying around..i am told the would fit

i need to no the following ...for me to pop on the 4age head to the 4ac do i have to change the pistons in the block as it still the 4ac inside if yes will the 4Age pistons fit with no problem...

iwill be running a weber carb 32.36 and having a manifold made...

Posted: Tue May 15, 2007 8:50 am Post subject:

Crankshaft of 4AC is lighter but weaker and you need to drill hole for the oil cooler pipes. Pistons are different.
But yes, the block itself is the same.

Posted: Tue May 15, 2007 9:11 am Post subject:

Oil cooler is optional.
4AC pistons possibly will work but resulting CR will be sub-9.

Wataru Joined: 25 Mar 2007 Posts: 51

so the 4Age pistons will fit to that block do ireplace the whole conrods as well or can i use the 4Age psiton on that

Posted: Tue May 15, 2007 10:35 am Post subject:

max doing it right you need a difrent crank. I would not make that cost. rather pop up the 4age head and search for a full 4age engine. Finding a crank and pisons makes it expensive. I would take the shot and just use the bigpor thead on the 4ac lower block.

Wataru Joined: 25 Mar 2007 Posts: 51

here is my list of things

i have its a complete blue top head..the bigport : distrubutor,and the 4Ac block so no use of letting it waste.would post pic but not sure how [/img]

Takumi Joined: 14 Jan 2005 Posts: 222 Location: Zg, CRO

On my 4AC block that was laying around we fited 4AFE head. The 4AC pistons, conrods and crank were left inside. The head was shaved a little bit.

Engine went in Celica AT180, and it pulls strong and sounds healthy, now for 2-3 000 km Smile

Wataru Joined: 25 Mar 2007 Posts: 51

so do i need to change the piston or can i leave it as it and just pop on the head on the 4AC block with out any problems would it give me major problems ....

Wataru Joined: 25 Mar 2007 Posts: 51

what does he mean by "4AC pistons possibly will work but resulting CR will be sub-9."

Wataru Joined: 25 Mar 2007 Posts: 51

what does he mean by "4AC pistons possibly will work but resulting CR will be sub-9."

Posted: Wed May 16, 2007 10:21 am Post subject:

compression ratio as far as i knw

Wataru Joined: 25 Mar 2007 Posts: 51

so do i need to change the piston or can i leave it as it and just pop on the head on the 4AC block with out any problems would it give me major problems ....

Posted: Wed May 16, 2007 10:50 am Post subject:

Major problems - I think - no.
Are you from USA ? On Ebay you can buy CHEAP new 4AGE pistons, get rings also and make 4AGE even with 4AC conrods and crank. It will work for everyday use.

Wataru Joined: 25 Mar 2007 Posts: 51

No i am in south Africa... i and the piston here is a bit pricey

Posted: Wed May 16, 2007 12:05 pm Post subject:

Changed the topic title to something a little more meaningful:)

Max, you found a 4AG head but no 4AG block?

How about getting a 7AFE engine and putting the 4AG head on that? :
http://www.club4ag.com/faq%20and%20tech_pages/5A%20and%207A.htm
http://www.aeu86.org/index/engine-4age-to-7age-...c=4156/post=60902

Posted: Wed May 16, 2007 12:37 pm Post subject:

Wataru Joined: 25 Mar 2007 Posts: 51

hi

i was able to pick up a set of 4Age pistons and a crank for free... and all in a good state... so this all will pop in to my 4A-C block and off we go

Wataru Joined: 25 Mar 2007 Posts: 51

so this is what i have
> Bluetop 4Age head
> manifold
>all gaskest
>inake weber manifold
>weber carb 32.36
>4Age pistons + crank
>rings + bearings
>4A-c block

Posted: Mon May 28, 2007 9:52 am Post subject:

So you must find conrods only.

Wataru Joined: 25 Mar 2007 Posts: 51

sorry forgot about that got the conrods ...

Wataru Joined: 25 Mar 2007 Posts: 51

hi

i swapped my heads on my 4A Block the 4Age fits 100%

Swapped in Block :
4A crank to 4AGE crank
4A pistons to 4AGE std piston
4A Flywheel to 4AGE flywheel

so basically all in the block was upgraded <engine>

(1) i got a 4AGE distrubutor will it work as i will be running a weber carb
(2)can i use the norm 4A alternator

Posted: Thu Jul 05, 2007 11:24 am Post subject:

1. yes, but will work a bit different (get stable vacuum signal)
2. no because 4AGE alternator pulley is different (at least from 4AC version)

Wataru Joined: 25 Mar 2007 Posts: 51

so the 4AGe will then work but one sum mod i also still got the old 4A-C
ok as i checked the pulley both on 4AGE pulley and alternator the same

Takumi Joined: 14 Jan 2005 Posts: 222 Location: Zg, CRO

Wataru Joined: 25 Mar 2007 Posts: 51

ok i see my look more or less the same ...so i have to shop for a new maybe as the one that came with that block ...will see if i can make a mod on it if possible if not will get one either 4afe cuz to 4AGE parts here is like looking for gold

still got my engine standing in my room going to drop in car when i get the free moment ...think i will try fitting the alternatoer on to see what goes

thanks