For the love of a tractor engine: The life and times of the 18R-G

[airfireman1]

Has the head of the bolt stripped or the thread/
If its the head of the bolt try hitting on a smaller socket to jam it on the bolt head.
if its the thread that goes into the block i would suggest you see if you can get a helicoil kit to retap the thread and insert a new thread
cheers

[jedrock]

yea its the bolt head.its pretty rounded already so i don't know if a smaller socket will work. And as of my previous post regarding temperature, my car is running at almost 260 degrees Fahrenheit now, so i am getting my radiator recored and looked at, changing my water pump, and t-stat. hopefully this helps. Another think if my water pump looks rusted on the inside, is this a good indication of it gone bad?

[o_man_ra23]

jedrock, grab some vice grips or multigrips and try that on your rounded head. Be rough and forceful, so the tools have a chance to properly grip in. Before you get your radiator recored and all that jazz, run some radiator flush through. This will loosen off the crap in your block, which will then get dumped into the radiator, and so removed out of the system when you get the radiator re-cored. Have you checked your motor's tune?? Running lean or too much timing advance can cause you to run hot, and will also cause major damage if left unchecked for an extended period. Also, a smaller socket should still work... use an imperial one, they aren't much good for anything else

Omegaman, Toyota originally used peak and hold injectors (note resistor box for 18R-GUE and 2T-GUE motors), and they are better for tighter control on response times. This allows bigger injectors to be more controllable at idle, and helps you to have your cake and eat it too. The only downside that I can see is that they heat up a bit more, but if you keep away from the >80% duty cycle area, you shouldn't have a big worry about this, and by the time they die their natural death, you will be able to easily afford new replacements.

Check on our least favourite auction site for "1G DSM Injectors" which will come from something like a honda talon. You are looking for the turbo version, and they can be had fully reconditioned for about US$100. A more important factor than Saturated or Peak and Hold is spray pattern. Single point or multi spray. For an 8 valve motor, single point will give you a smoother idle by spraying on the back of the valve rather than on the wall of the port. So check how many holes are in the end of the injector before you buy, if there are 4, it is made for a multivalve engine, if there is 1, it is for you. Also check your ECU's capabilities, as you may not need resistors with peak and hold. MegaSquirts have inbuilt current limiting which negates the need for resistors.

[Omegaman]

o man.
where have you been. I could of had all this info you gave me a week ago.
I've downloaded and researched the injector types to a tee.
Yes, egay can be your friend, i'm bidding on an excact set of injectors you refered too, from good old USA. 450cc should be fine for my application, maximium will be 550cc.
I will be using emange piggy back ecu.
went searching at wreckers but couldn't find any to suit. i've got my eye out for RX7 13b inj also. 86-87 i believe.

thanks for info.

[Omegaman]

On a seperate note.

is there an engine reconditioning place in the inner west, Syd, that can recondition or freshen up an 18rg head.
I'm after one that has dealt with them before.
my man who did my last one has shut shop i believe, old age.
i need the usual - reseat valves, adjust shims, and also change valve spring to a better set.
I want to give him 2 heads ......253 and 270 and pick the best to re-freshen up.
A port job depending on price.
any thoughts

[o_man_ra23]

Omegaman... been in NZ on my honeymoon, so wasn't much of a chance to help you out over there Check with the E-manage website to see if they can handle low imp injectors, or if you will need a resistor pack. If you need the resistor pack, I have one here you can have (no good to me). Also, why use a piggy back when the original ECU was crap to start with?? Why not go a full aftermarket like a MegaSquirt or an Adaptronic??

88253 head will need injector reliefs cut if that hasn't already been done. Not a hard job, but something to consider if you do end up using that head.

[Omegaman]

congrates on wedding.

Emanage can handle the 18rgeu. had the car running on it. a little rough but that was with no changes or map inputs. Just waiting on w/b Lc l O2 sensor from the states and injectors to start mapping. the std injectors are 210cc so allowing for the ability for a 150% increase with emanage 440cc - 550cc seems a good change.
I already have the resister pack, thanks.

The 253 head has had the relief cut outs already done, but I changed to the 270, as i need the valves re seated ( 3rd cyl leaked) the 253 head has better H/D springs, where the 270 had match porting already done. so mix and match for the better of the two.

The emanage was a cheap option, at $300 for everything required (wiring looms, cd, cables). I managed to wire it in myself, so easy and cheap.
I am a member of the emanage forum, so their help has been great.

[Omegaman]

I'm may be looking at increasing the air intake with a larger flap style AFM.

What alternative can I use thats compatable with EFI (18rgeu) motor.

If nothing available what simple canges can I make to adapt one?

[airfireman1]

3vze one from a 4 runner is near on identicle, I have a spare one here from when I had a 4runner on gas for just in case I had a serious backfire. let me know if you want to try it

[Omegaman]

when you say identical, you mean has better air flow but suits the geu, with plugs and electrical?
if so, i will check out the wrekers here and compare with mine.
seems like everything i need this week is in WA..lol.

edit. I have calculated the 150% wrong it seems..
the emange handles 150% change so, 210 x 150% =315cc big whoop, why change?

what can the std ECu handle, as increase in injector size? 450cc should be fine, with some messaging of the engine? more

[airfireman1]

When I say Identicle I have compared the dimensions and the plugs an both the 18rgeu and the 3vz afm are so close i could not pick the difference. I have both afm here and the only difference I can see is the part numbers. I would hazard a guess that you could use either, .
What efi gear do you have for the rg and what do you need.
Dave

[Omegaman]

What efi gear do you have for the rg and what do you need.
Dave

I have all the standard 18rgeu EFI gear.
since you say its the same in every way, the air flow should have a higher air intake or be able to read higher. This and the emanage should be able to make the neccesary adjustments..
can you qoute me the model numbers you have. (3vz & geu afm) i want to google any info for comparison.

cheers.

[airfireman1]

Ok the standard 18rgeu afm has these numbers 22250-34010 197100-2060
the 3vze has these numbers 22250-65010 197100-2920
the both have the same physical dimensions and mounting points
Hope that is of some help
cheers dave

[Omegaman]

thanks heaps for that info.

[o_man_ra23]

315cc will give you a much better result than 210cc... until you talk about boost. If you go to an aftermarket ecu (such as MegaSquirt which is sub $400 including loom, software, freight and currency conversion) then you can ditch the AFM and use MAP. Basically you are going to need to do some very serious tuning in the e-Manage anyway to be able to utilise a different AFM and bigger injectors, and considering just how crap the original ECU is (analog ECU), your idle control etc are going to be somewhat primitive at best anyways. I don't think it would cost you much on the changeover to sell the e-manage and go to a MS, and you will have a far more versatile system. Also, how confident are you that the stock ECU is in working order?? Age plays nasty tricks on electronics, and a 30yr old ECU sounds to me like a recipe for disaster. Just my thoughts on that. Oh, and the stock ECU won't cope with ANY changes to injector sizes or component changes on it's own. They have a very fixed semi-linear tune on them, and don't have closed loop compensation (unlike a lot of new ECUs).