18rg question

[danielk]

Hi guys.
I have an automatic RA23 that i just took the 18r out of (running horribly) and replaced with a 3T temporarily (no idea what this engine is out of, but its a push rod motor with a cross flow head, guess 1.8L?) which i got out of a rooted TA22. I also made it manual at the same time using the gearbox that came with the engine. No idea what that is either. I eventualy want to put an 18rg in there and was just wondering if it would be feasable to just get the head and add it to the 18r block i have once reconditioned? I know nothing about these engines and have no idea whether it would even be worth it but i thought i may as well ask the experts seing as i already have that engine sitting there. Thanks for any help you guys can give.

Dan

[SillyCarS]

hey,

just stick with an 18rg block im pretty its not possible, but for all that extra effort anyways the 18rg block can be bored to a 2.2L. thats what im currently running in my ra23 if it helps
try to get ur hand on the yamaha head too

good luck with it

[ra40celica]

18r and 18rg blocks are identical except where the dipstick goes,

but u will need 18rg pistons, top timing chain, the list goes on,

do a search i think this has been covered lots of times.

[danielk]

I did a search but could not find what i wanted. This may just be that i am very bad at searching lol. Ok so the blocks are interchangable. What i need to know is exactly what else i would need to make it an 18rg. I would be boring it out slightly in the process of fixing the block and so would have to buy new pistons anyway. so what else. you mentioned the timing chain, and of coarse i would need the head. Thanks guys

Dan

[ra23celica]

You won't be able to mate the 3T or 12T if that is what you have now, with the 18RG. Get the 18RG rebuilt and drop that back in.

[danielk]

Nah the 3T is just a temporary engine. I am trying to make an 18RG out of an 18R.

[barned01]

http://forums.toymods.org.au/index.p...t=0#msg_626546


there is a bunch of info on the old forums matey, go there and wade through a fair bit of posts about what is required.
As a rough guide though the blocks are identical bar the dipstick.
you will need
head and associated parts on it.
auxiliary drive shaft (although i think you could get around this if you weren't going to use the dissy and instead run an ignition setup from the crank position instead but this is just a thought.) and the gear thingy that goes in the block where the 18rc dissy would go
front timing chain cover and associates guides.
Timing chain tensioner
oil pump from 18rg (more volume)
pistons
you could get away with standard 18rc crank and rods although 18rg ones are preferred
probably a couple of other things.

search there write up what you did and update this forum with the info.
good luck.
ps i did the 18rc to 18rg so if you need a hand let me know.

[Major Clod]

Its going to be a bit of a mission to find all these bits seperately, you're better off getting a whole engine.

[barned01]

there are a few people that horde 18rg stuff around here. (points finger squarely at steve m) the main things are the front timing chain cover and associated slippers, the oil pump and pistons. (and obviosly a complete head).
if i had the funds i would love to experiment with using the 18rc style oil pump drive shaft instead of the 18rg one (which allows for the gear at the front to run the dizzy).

a good aproach would be to find a rooted but complete 18rg and graban 18rc to swap parts over as needed to get it running.

[danielk]

yea i was thinking i may get the block i have ready (bore it to 2.2L, clean it up ect) and then look for a cheap 18RG. Then just take the parts off the poor condition 18RG and clean them up (wanna port the head ect) before puting them all on the clean 2.2L block. I figure i should end up with a nice motor this way. I will update this thread as i go.

[river]

Hi,

Why bother playing around with the existing 18R-C block and trying to make it into an 18R-G, especially when you're looking for a cheap (poor condition) donor 18R-G engine?

Toss the 18R-C out and just buy a complete 18R-G and start from that. If you do it the other way around and the donor 18R-G is in poor condition, then you're going to have to get it refurbished and fixed up. What if the head is shot on the donor 18R-G? Or the pistons are rooted? Any problems with the donor engine will have to be rectified before you put them onto your 18R-C block.

What I'm trying to say is... if you are going to get a poor condition, cheap donor engine then there could be a myriad of issues with it. You'll need to fix any problems with the donor engine before you put them onto your 18R-C block, so you may as well get this engine fixed and rebored etc and forget about wasting time, effort and money on boring out and trying to use the 18R-C block.

However, should the donor 18R-G engine have a cracked block then go for it - otherwise, it seems like a pointless exercise.

seeyuzz
river

[roadkill]

Hi guys, i'm a little new to this so if i say something that isn't right - don't yell at me.

Anyway, i'm considering doing the same thing as DAN131, for a hilux down the track. but other questions also rise for the transformation in regards to compression. if he gets an 18rg head or 18rgu head (they run a different compression yeah????) My 18rgu's that i have pulled apart have all had dome top pistons but i've never pulled apart an rgu, so will he need flat tops when he bores it out etc etc.

I just looked at my timing cover plates for the rc and the rg - the obvious difference is the dizzy hole but more importantly the chain runner pad. Different spot and different part no. Pretty sure you'll need to find one of these or it could get difficult. Personally i'd just get the bombed out 18rg and just rebuild it, they're worth it

[danielk]

yea i know thats what i should do. The reason i would love to do it this way though is that i can slowly save for the whole motor and clean up this block. Then i would have to go over absolutly everything as i moved it over. Would completely detail it ect and would learn a lot in the process. I know if i just buy a complete 18rg i wont end up doing it in as much detail.

[river]

Hi,

I hear what you're saying... but hear me out...

You can buy an 18R-G engine that needs some TLC for a good price. Let's face it, you're going to need an 18R-G to do your project.

You can do all the work you want on the 18R-G without wasting time, money and effort on reboring out and setting up an 18R-C block to take an 18R-G head and ancilliarys.

You get the 18R-G and pull it apart. Then you can rebore the block to 2.2litres - even buy and put in a 22R crank to get it up to 2.4litres. You pull apart the head and get it ported and polished - maybe even shaved a tad for higher compression. You then get and put in some mildy aggressive cams, higher compression pistons (oversized for 2.2litres).

In regards to the induction system, you can get rebuild kits and redo the carbies, or put in a fancy aftermarket EFI system. You'll want some nice extractors. Electronic ignition, etc.

This can all be done to the 18R-G that you purchase. You don't need to do anything with the 18R-C block. The beauty of having the 18R-G is that all the parts are there and all you need to worry about is bringing the engine up to the specifications that you want. There's no reason why you can't learn a hell of a lot by doing this on the 18R-G. All the 18R-C block will do is help you relocate the dizzy and dipstick - which, in the scheme of things, isn't going to help you learn more about the engine.

Of course, if you are hell bent on going the 18R-C conversion to 18R-G, then knock yourself out and have fun. Whichever way you decide, you'll learn a lot about these engines.

seeyuzz
river

[danielk]

Yea your right River. I guess ill just wait till i can get the 18rg. Im just an impatiant 18 year old lol. Anyway does anyone know were i could locate one or anyone i could contact who may know? Thanks for your opinions and help guys.