BT 20v rebuild cost?

[v33sonata]

What should it cost for a rebuild on a 20v? No bent valves just gone thru adjusted,milled, pressure tested, the hole nine, ect. I got quoted $600. that seem right?
thx

[gaijin_rokurunner]

full rebuild will be alot more then that will all new parts

[v33sonata]

How so?

[cmt1390]

if you doing a proper rebuild gasket kit, bearings, piston rings, oil, and on top of that take the head to a shop just for the sake of making sure is ok....... a grand as minimum. I say again a PROPER rebuild.

[onnaj]

What should it cost for a rebuild on a 20v? No bent valves just gone thru adjusted,milled, pressure tested, the hole nine, ect. I got quoted $600. that seem right?
thx

$600?? You'll absolutely won't have a complete rebuild with that. I've just rebuild one, not yet completely finished though and i can tell you it'll be a lot more.

Like cmt1390 quoted a grand would be the absolute minimum. Remember that only a gasket set will cost you around $250-$300. Bearing for the conrods and crankshaft would cost about $150-$200 i tink. Add some piston rings for about $150 and you're already at the $600 mark. Didn;t have any labour cost yet and fluids! Then you have to polish the valves, grind them, etc etc. I'd says you'd easily pass the $1000 mark. Or you have to do it all yourself.

Oh and when you're there, i'd advice chaning the timing belt, hydraulic tensioner, clutch with bearing, etc.

[cmt1390]

yea remember in the end it'l be worth every penny and were talking just the engine, with mine I bought Denso Iridium Racing spark plugs and on top of that Royal purple oil for the engine, tranny, clutch and even a fuel pressure regulator......... yeah way over a grand but hey is your engine and your money

[gaijin_rokurunner]

Parts alone for a complete rebuild will cost u close to a grand if not more...u need oil pump, water pump, tensioners, timing belt, spark plugs and wires, cap and rotor, piston rings, bearings, full gasket kit...then the machine shop labor to hot tank and hone you block, re assembly, new valve job, deck block or plane the head, assembly of the head ect ect alot of this stuff u can do yourself if you know how if not add the cost of shop labor to that...my advice is if u got the money for aftermarket stuff like rods and pistons, valves ect ect do it while the engine is getting a full rebuild or you will pay double later when u tear it down again to add those mods..

[v33sonata]

OOPS here where I went wrong. I ment to post this as "rebuild cost of a 20v BT head" Sorry guys lol. Just talking about the head here.

[gaijin_rokurunner]

Heads can also be expensive to build mines was about 2000..which was porting, shimming, flow benching, DLC buckets, valves and springs, valve job..add another 900 for cams

[onnaj]

If you do a normal rebuild for the head i think $600 will also be insufficient. Also depends if you already have the head off or not.

It's pretty labor intensive. First of all is that everything has to be taken out. Then it should be cleaned, though this isn't done always i know. They have to get the carbon out as far as they can reach.
All the valves has to be polished one for one and then grinded to the head. You need new valve stem seals, maybe new shims, a cam cover gasket, water outlet gasket, etc etc.

I would say $600 isn't much, but it all depends on how thoroughly it's going to be done. I'd advice you to it the right way right away. When you have to get the head off once more, that would really hurt your wallet. Better safe then sorry.

For example: Yesterday i killed some new valve stem seals myself, but on the exhaust side i spotted some little tears in the rubber of the valve stem seals. And that was after i've mountend all the intake valves and 3 of the exhaust valves. I really wanted to be sure, so i took out all the valves out again for inspection. Happily the rest of the seals turned out to be fine. Hell of a job, but now i can drive without worrying about the seals.

So that's why i advice to do it the right away. If you're going to doubt about anything you won't drive with trust. Better drive with a big smile

[v33sonata]

This shop has done my head stuff in the past and yes the head is taken off. I just noticed its more then he normally charges me and was wondering wha tthe going rate was for a rebuild on a 20v in stock form.

[HASport AE86]

Cake walk.

Toyota Echo valve stem seals, take the valves out and clean everything. I just use a little bit of lapping compound on the valves and check the contact pattern. Aint rocket science here.

I rebuilt my whole engine for pretty cheap. The trick is parts interchange. What I recommend:

-Echo valve stem seals
-Lap the valves real quick
-Slap it together
-Check valve clearances, the spec range is HUGE lol. Dude if it fits it ships.
-As long as you have the head off, flipping JSP conversion for the water flow. Drill out the coolant port, block off plates, etc.
-RWD waterpump and oil pump setup. 16v AE92 oil pump with spring tensioner and ST20v timing belt to get rid of the BT tensioner setup.

All that stuff you can get stateside for under $200 for everything using Aisin (OEM) parts. Sh!t, drop it off and I'll do the head. I need money for a tubing bender lol.

[v33sonata]

Cake walk.

Toyota Echo valve stem seals, take the valves out and clean everything. I just use a little bit of lapping compound on the valves and check the contact pattern. Aint rocket science here.

I rebuilt my whole engine for pretty cheap. The trick is parts interchange. What I recommend:

-Echo valve stem seals
-Lap the valves real quick
-Slap it together
-Check valve clearances, the spec range is HUGE lol. Dude if it fits it ships.
-As long as you have the head off, flipping JSP conversion for the water flow. Drill out the coolant port, block off plates, etc.
-RWD waterpump and oil pump setup. 16v AE92 oil pump with spring tensioner and ST20v timing belt to get rid of the BT tensioner setup.

All that stuff you can get stateside for under $200 for everything using Aisin (OEM) parts. Sh!t, drop it off and I'll do the head. I need money for a tubing bender lol.

you saved my butt on the cost of valve seals!! thanks

[oldeskewltoy]

The big *IF*..... does it need valves, valve guides, or valve seats.......

No? You can rebuild any 4AGE head for about $200-$600 depending on whom does the work.

Yes... get ready to reach DEEP into your pockets... valves are about $25-$30 each, guides about $10 each, seats maybe $15 each... and none of those costs include the machine work REQUIRED to do these tasks. Costs can range from $400 to over $1000.

[NostalgicHiro20v]

Once agin HASport AE86 keeps it real & to the point. Short Sweet Simple. on a side note I'm gonna be picking up a spare 20v to prep a fresh block. Does anyone know if there are english manuals that tell the correct torque specs/clearances for stuff? Thanks

[gotzoom?]

Before you spend a penny on parts, check the block mounting surface for flatness. If it's out of spec, you'll at minimum need to factor a decking into your plans. If it's far out of spec, as they sometimes are, it should be worth $5 or so at your local recycler.

[v33sonata]

Once agin HASport AE86 keeps it real & to the point. Short Sweet Simple. on a side note I'm gonna be picking up a spare 20v to prep a fresh block. Does anyone know if there are english manuals that tell the correct torque specs/clearances for stuff? Thanks

http://www.locost7.info/mirror/4age_blacktop.php

[HASport AE86]

Once agin HASport AE86 keeps it real & to the point. Short Sweet Simple. on a side note I'm gonna be picking up a spare 20v to prep a fresh block. Does anyone know if there are english manuals that tell the correct torque specs/clearances for stuff? Thanks

AEU86.org has the bt 20v fsm in pdf format online.

A 4AG is a 4AG. Most all of the torque specs are the same from 16v to 20v. 16v headbolts have a torque spec, 20v headbolts are a torque to yield style, so you set them all to a low torque then rotate 90 degrees twice. What I've been doing as of lately is running all 16v cooling and oil system on my 20v's. Keeps cost way low. For the price of a brand new OEM 20v waterpump I can rebuild the whole bottom end. I just go by clearances. Is it within the limits? Yes? Then clean it up and put a new seal on it and ship it mehn.

Like I mentioned:
Valve stem seals are off a Toyota Echo
Headgasket you can use a 16v TRD one for $30
Distributor O-ring is the same as a 16v
Exhaust cam seal is the same as a 16v
Piston rings for a BT 20v are the same as a high comp 16v, ST are different
Main and rod bearings are the same as a high comp 16v or 4agze. (ACL combo pack is like $120 all day)
Oil pump off a high comp 16v
RWD 16v water pump and water pump housing, 16v thermostat with three small holes drilled for bypass
All 16v pulleys
JSP cylinder head mod

A lot of people complain about the 16v coolant flow on a 20v. I haven't had a single issue yet in 6yrs and on more 20v's than I can count. If anything it runs TOO COLD. What works in theory doesn't always play out in practice. Look at the 20v coil on plug conversion. That thing shouldn't work, but it does.

[v33sonata]

ROFL thanks for all the info guys! My machine shop has the new head and is working on it. The block will be next.