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

[o_man_ra23]

Photo would tell Roscos what he wants to know.

[river]

Hi,

How common were the 18R-GR in this country and did many get in?

I had a 2T-GR in my 23 and it went like the clappers but the head was totally different to the basic 2T-G.
It had different size valves and the cams had a different grind. Were the 18R-GR similar?

The 18R-GR was the basic 18R-G but with a recirculating air-pump for initial anti-pollution control. The 18R-G was 145hp and the 18R-GR was 140hp... bugger all difference, and that is why they went as hard as the 18R-G. They ran a 230 head, but IIRC, they ran the same cams as the 18R-G.. 210 cams.. but will have to confirm that. Compression ratio was a little less than the 18R-G. Again, this is something I need to confirm.

I don't know of many 18R-GR engines that got into the country. Most are 18R-GU and 18R-GUE engines. The more powerful 18R-G and especially 18R-GR seem to be less in numbers than the other variants.

seeyuzz
river

[vpatrol]

I just picked up an 18R-G but I'm unsure exactly what variant it is. It was disassembled with two heads. The only timing cover has 11321-88210 which indicates the early version. However I'm not sure which head was mated to it originally. One is stamped C 10 8 with ZP just below and the other 1 4 17 with 5G below. Any ideas? Also how can I tell which pistons I have? I'm trying to do an inventory and figure out where to go from here as far as eventual re-assembly. Cheers. Be great if I have one of the early ones relatively complete!!!

[Willofan]

Hey, did you get this engine from Tasmania, they've all got two heads down there - LOL (Sorry Tassy Toymodders)

Seriuosly there will be some numbers on the front of the heads and maybe some people can advise better on the engine number. Can you post up some pics of what you have to give you a clear idea on engine, heads, pistons etc.

This is covered extensively throughout this thread.

Cheers

[vpatrol]

Both heads are 11111-88250 on closer inspection. Cam 1351 88250. I imagine pistons were from the same? Not sure where the 88210 cover came from however.

This thread is pretty long to check out all posts

[Willofan]

Hey vpatrol.

See the first few posts in this thread on page 1and it covers most of your questions there.

With regards to the pistons you have and if you can use them or not, it would be best to measure up the bores and pistons to see what you have to work with, see how too's in your green book.

It is very rare to get a perfect bore on a used motor that you can drop in the old pistons with new rings without clearance issues. Once you have done this, you will know if you can re-use the pistons or need to go oversize with new pistons/rings. Problem is they are usually order only from various suppliers. I find Arias are best from the states.

Go through everything you have to see what is worn like crank journals, timing gears, guides and chains etc. Crank journals are pretty robust and less likely to wear.

You can get ACL gasket kits from Repco & bearings from Stewart Wilkins swmotorsport.com. Chains and gears are around from time to time.

Depending on what you have to work with and your budget, you can get away with as little as $800 to get it up and running or up to $4000+++ for a strong reliable motor with some horsies. Last one I was involved in cost the owner $7500 without assembly, but it revs to 8,000rpm all day long.

Let us know how you measure up??

Cheers

[Omegaman]

I believe the pistons are the early one's 9.7.1.
Mine are and they write 9.7 on the top dome.

Though, your rocker cover is totally different to what i've seen.
There's no toyota sign on it, it's smooth on the top. chech out other to see what i mean..Strange.

[vpatrol]

looks like its been ground down on top. I imagine the old owner wanted to spray it. hopefully the pistons are ok. I'd like to build the engine the right way (ignoring the fact I don't know what I'm doing) but I don't want to break the bank on it.

[Omegaman]

If your on a budget build, go slow.
Get the block honed, i did it myself, not that hard. (there's a process though in doing it)
New rings, head gasket, look at bearings... I reckon checking cam clearances saves you on later adjustments. It comes down to what you can check and adjust is required.

[vpatrol]

engine is in NZ and my celica is in NSW waiting for a ticket to come over here. Definately no rush!

I had planned on getting the block and head machined. Probably will have an engine shop look at everything however I would like to do as much possible. Even if its only checking clearances. Teach a man to fish etc etc

[roadkill]

Depending on what you have to work with and your budget, you can get away with as little as $800 to get it up and running or up to $4000+++ for a strong reliable motor with some horsies. Last one I was involved in cost the owner $7500 without assembly, but it revs to 8,000rpm all day long.

Cheers

Hi,

what the hell did he spend $7500 on pre-assembly? I just fail to see how you could spend that much! Unless he got custom ground cams, custom rods, forged pistons, massif headwork and straight cut gears...................even then

bEn

[Willofan]

Lets see, there was $1440 for 4 new Argo I beam rods, new forged 10.5:1 90mm pistons $1200 from a mob in Melbourne, second hand block all treated bored and honed to match each piston, steel crank ground and treated, lightened steel flywheel, 7.25 twin plate clutch, fully balanced from clutch to front pulley, head fully rebuilt with titainium inlet valves and match ported to inlet/exhaust and 4-1 sand bent extractors just to name a few bits that went into it, once running it was closer to $10,000 when you inlcude labour. His aim was strong as an ox and rev all day like it was going to do a Bathurst 1000 race.

After all it is only a tractor motor and should last for ever ploughing in the paddock. All I had to do was help him drop it back in and fire it up again.

Oh and this did not include the '11111-blank' Tosco head, 140amp/hr alternator and twin 48 DCO webers and 288 cams with adj sprokets he already had before he blew the #3 rod out of the old block, hence why he went full hog.

He has since sold it all and the car now it sits there not being used at all, go figure

[roadkill]

hI,

wow, that's pretty insane but kinda impressive. I guess getting everything new/reground/machine/titanium valves etc it wouldn't be terribly hard. Kinda crazy though......... What HP did he make with it in the end?

bEn

[Willofan]

Never been dyno-ed to my knowledge, but he took about 5 secs of his times at Eastern creek. Call it $2K per second LOL

[river]

Hi,

He should of turbo'd the engine. Would cost about the same and produce double the power.

seeyuzz
river