OST-071: For an AE71 - Largeport for a liftback

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oldeskewltoy
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OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Sun Jan 24, 2021 2:48 pm

I was contacted during mid summer by this client. I had just begun OST-070, and he wanted OST-071 for his AE71.

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As you can see, it currently has a clean 4AC engine in it......

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But he wants a bit more.........

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More to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Tue Jan 26, 2021 10:51 am

So... the first order of business is to acquire a 4AGE - not so easy anymore, this one took about 2 months for my client to find.

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It is an early 1989 (10/1988 built) 4AGE (vin number tag on engine traced using toyodiy) that was originally delivered to Canada.



I got the engine on a stand.....

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and began dismantling the engine..... As more of my clients are wanting complete engines, this tool is quite handy, jaws are a good fit

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Head gets pulled..... damn.... not good news

EVERY ONE of the cams journals is seriously damaged...... :(

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How bad...????

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While this can be repaired - the time and effort is more then finding, and paying for another head.

Another head is found, and it is in very nice condition.

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and un-machined.......

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more to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

jinx
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Re: OST-071: For an AE71 - Largeport for a liftback

Postby jinx » Tue Jan 26, 2021 4:50 pm

clean car

the gear is often too close to oil pump case, for most tools to fit between
If the gear is really stuck on there, I've seem pieces broken from the edge of the gear... or the tool
Half of em I drill & tap/use a heavy duty puller on stubborn crank gear
One CA18 pulley made a loud bang when it released. I was taking a break.... then Bammm!! Scared the crap outta me :lol:

strange looking flywheel. Some aftermarket perf upgrade ?.
Then there's that stupid looking distributor cap(came on 1 of my 4AGEs too). Toyota engineer had to be on drugs. Fugly

davew7
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Re: OST-071: For an AE71 - Largeport for a liftback

Postby davew7 » Wed Jan 27, 2021 3:57 am

Flywheel is from a FWD or MR2. Will need a new one for a RWD, the water plumping will also have to be changed or modified. Same here on the distributor cap, I've never seen one like that?
Davew7

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oldeskewltoy
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Re: OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Wed Jan 27, 2021 9:16 am

jinx wrote:clean car

the gear is often too close to oil pump case, for most tools to fit between
If the gear is really stuck on there, I've seem pieces broken from the edge of the gear... or the tool
Half of em I drill & tap/use a heavy duty puller on stubborn crank gear
One CA18 pulley made a loud bang when it released. I was taking a break.... then Bammm!! Scared the crap outta me :lol:

strange looking flywheel. Some aftermarket perf upgrade ?.
Then there's that stupid looking distributor cap(came on 1 of my 4AGEs too). Toyota engineer had to be on drugs. Fugly




davew7 wrote:Flywheel is from a FWD or MR2. Will need a new one for a RWD, the water plumping will also have to be changed or modified. Same here on the distributor cap, I've never seen one like that?
Davew7



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Dist cap is fwd for use in the AE92.


Flywheel is from a Blacktop, and it does work in rwd, I have the same flywheel in Surreptitious - it is around 13#s, so 2-3#s lighter then any other stock flywheel. I think its a score....


I'm hoping ( Image ) that I will not have that bad of an encounter (broken tool, or pulley)



So first things first.... get it all cleaned.


The head.......

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and the block.... note already bored, and honed....

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getting the block taped up...

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as with a number of builds.... this one also gets the metal blackening epoxy coating

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By the way..... did you see the repair?





more to come....... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Wed Feb 03, 2021 10:04 am

oldeskewltoy wrote:
By the way..... did you see the repair?



upper water pump mounting point - you can see the heat applied, and the repair inside.

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So while the block cures... Head work commences... beginning with a deburr

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And a bit closer.....

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this piece broke off with very little pressure, it could have ended up swallowed....... :(




more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
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Posts: 2082
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Location: Portland, Oregon

Re: OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Wed Feb 10, 2021 9:18 am

Port work begins....

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One down....

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further progress.... 3 down

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and 3 down on the intake side....

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Makin' chunks....... a bit closer view of working an exhaust bowl....

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more to come....... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2082
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-071: For an AE71 - Largeport for a liftback

Postby oldeskewltoy » Fri Feb 19, 2021 1:21 pm

After finishing the porting, the head goes back to the shop for a fresh 3 angle, and of course back cut on the intake valves.

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A unique opportunity... 2 heads, side by side, OST-073 on top before work begins, and OST-071 on the bottom showing all the port work and its fresh 3 angle

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With the valve job complete, it is time to measure chamber volumes. Head is propped up allowing me to get an accurate measure

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and the results.........

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more to come....... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!