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

[scootaphill]

has any one ever cc the combustion chamber of the head while its been apart? id be curious to see where its at

cheers

[YelloRolla]

If I remember correctly it is 70cc. Witzl will confirm, his brain is younger than mine (prolly sharper too).

[The Witzl]

yep, 70cc or 71cc

you've got my green book with that written in it IIRC jason

[scootaphill]

what model head was that? did you happen to cc the block as well?? and if so what pistons were used?

thanks, now i have something to compare to when the time comes!!
phill

[The Witzl]

that's a stock 88250 head which had just been rebuild.

[Damo82]

Guys, does anyone happen to have a photo of the exhaust side of an 18RG and 18RC head?

I am heading out to check a set of extractors that "may" be for an 18RG and I was just looking for some reference material. Unless anyone knows an obvious way of determining the difference between 18RC and 18RG extractors.

I know 18RC has the inlet manifold above the exhaust manifold but that isn't going to help that much.

Cheers

Damo

[Norbie]

Port spacing is pretty different so you shouldn't have a problem telling them apart.

18R-G:  O       O       O       O

18R-C:  O          O O          O

[Damo82]

Thanks Norbie, you are a god. +rep for you

Damo

[Steve M]

If I remember correctly it is 70cc. Witzl will confirm, his brain is younger than mine (prolly sharper too).

When we measured the 88251 and 88270 heads, they both came out to an average of 72ml on the dot.
Maybe that's one more way that they dropped the compression on the later models.

[scootaphill]

great work karl and steve... you guys didnt happen to cc the blocks as well

when my motor is apart i'll be sure to cc my block with the 22r/e pistons as a comparison

cheers

[YelloRolla]

If you know which head you have (wither the 70cc or the 72cc) and you know the Comp Ratio of the engine, go to this site
http://users.erols.com/srweiss/calccr.htm
and type in the fields that you know it will then tell you what the dome = in cc

Don't miss the bit at the beginning where you place a 2 in to convert to metric.

[Steve M]

... you guys didnt happen to cc the blocks as well

Nope, there wasn't much point as there was no deck clearance.
I use the calculators from this guy, I've mod'd them a little, but find them most useful.
I changed the dish volume to dome volume and swapped the +/- symbols.

http://www.superjamie.net/garage/

Plus, down the bottom is a link to great picture of a KE35 4WD.

[The Witzl]

Well just a little more info to push this thread back into life

Toyota Genuine Head Gasket, 18R-G, (p/n not known yet), $59.00 retail, available in Australian warehouses.


Ingram Alternator P/N RXA-430 is a close fit high output replacement for 18R's
... it's 80A, from a landcruiser with 3F engine, internally regulated. YOu just have to change the pulley to a "1A" style and use washers to fill the extra space in the pivot feet spacing.
---- i'll be down at pick'n'payless this weekend to do some testing

[The Witzl]

Just for reference sake... here's my clutch fan setup in my car, as it is right now

[river]

Hi,

You gonna put a fan shroud around it?

seeyuzz
river

[Mr DOHC]

hello ppl, i'm back

i went to cliffs house the other day and drooled for a ges at his '28, it uses the GENUINE 18RG crank, 16R rods, 22r coaster pistons which have been flycut.
The crank has been fully welded and offset ground to give 3.5mm extra stroke, it is back to original journal size too, so it can be ground down if necessary too.

[rn41leroy]

hi all,
i think i may have asked this question before: i have some 18rg stuff, sum of the following i need to no if anyone can help me out of sourcing the parts to complete the engine:
-head no. 1- 88250
-head no. 2- 88210
-inlet 88230
-exhaust 88251
-cams no.1 88258
-cams no.2 have sprocket 88210
can anyone help me out on the best build and does anyone have the parts to build a complete engine
thanks to any help received leroy

[scootaphill]

WOW!!! I just scored from ebay a freaken awesome TRD and performance book for Toyotas.... including HEAPS of TRD part numbers and bits for 18RG engines

I'll be posting numbers soon

come on karl where are they if i had any rep power i would neg rep you just for teasing us all LOL

cheers

[river]

Hi,

Here's some nice diagrams of the wonderful and dependable 18R-G. I made the images big so you can see them better. This is the 1st of 2 posts, due to the 10-image per-post limit.

Overview


Cylinder Head


Cylinder Block


Gaskets


Cylinder Head & Cover


Clylinder Block & Oil Pan


Timing Cover & Rear-end Plate


A few more images in the next post.....

seeyuzz
river

[river]

Hi,

I'm baaaaaaaack. As stated, here's the 2nd post of 2 with a few more diagrams of the venerable 18RG.....

Mounting


Crankshaft & Pistons


Camshaft & Valves


Timing Chain & Damper


I got more stuff for the 18RG, including inlet, exhaust, carbies, cooling system, starter and alternator. So, if there's anything you want put up please let me know.

I may have some stuff on the 18RGU/18RGUE engines, but I'll get back to you on that tomorrow sometime when I get a chance to check my stuff.

Oh, got all the same stuff for the T, 2T, 2TB, 2TG, 18R and 18RE engines - but as this is ostensibly and 18RG thread I kept them out.

seeyuzz
riuver