Calling All 18rg Wizards

[DQIKST]

hey wizards and onlookers,

Please keep this thread nice and clean with only informative stuff, PLEASE

i need to rebuild my 18RG, ive spent heaps of my time reading the tractor thread that was started by the witzl and even offered to speak to MR DOHC but his engine is gooone, bad luck for me eh,

from the tractor thread i have gathered the following.
best set up using stockie bits are
9:7:1 pistion ( will be sending jeffro a PM shortly)
88253 head. just under the cam cover it has 88253 .(does that mean i have a 88253 head??)
88210,88230,88250 cams, which ones are the best and who has them??

also anybody know of where i can get things done and things i would need apart from apparent things like gasket kits please contribute, i havent won the lottery my cousin is a mechanic so i dont think it would cost me a fortune.

thanks

[Mr DOHC]

talk to RA_28 {alex} he has some huge wade cams, made 197hp with 9.7:1 and 45mm webers

[LeeRoy]

Wilkins motorsports in Mulgrave (near Blue Mountains) sell full gasket kits

- LeeRoy

[Mr DOHC]

acl do gasket kits as do durapro

[river]

Hi,

Bored to 2.2litres. Stroked another 200cc to 2.4litres (use 22R crank?). Use 253 head with 210-head cams - or rework a 210 head and run with 210-head cams. Use 9.7:1 compression pistons. Polished & ported. Extractors. 44mm Solex or 45mm Webber, if you're not going EFI.

seeyuzz
river

[DQIKST]

hey guys, im on the look out for 210 head cams. i have 253 and the cams are adjustable what is the best setup if looking at the engine drivers side (left) passenger side (right)

chains are lined up and hole 1 is on the top and going clockwise for 2,3,4



hey river if i do not get 210 cams by the end of the week im going to keep my 253 cams as it was only a head gasket that blew and i want to explore the darkside of 1GGTE at the end of the year

thanks

[brett_celicacoupe]

18rg head gaskets are still available through toyota as far as im aware....i bought one last year. i believe autobahn sell gasket sets for them as well.


for memory, the way you time them is that the 2 notches in each cam must be at 12 o'clock when the crank is on TDC.


"Steve M" off these forums is HIGHLY knowledgeable with these engines and is very helpful.

[barned01]

ok i think it has been written before but i can't find it

looking at the front of the engine, rotate the engine clockwise until you reach top dead centre on the number 1 cylinder (i believe the dissy points at about 2 o'clock from memory if you are using that as a guide).
observe the 'notch on the intake cam. It should be pointing to 12 o'clock. ie. straight up.
if it is slightly to the left:
undo the bolt on the front of the cam, rotate the offset washer until you can get to the pin. WIth some pliers and a magnet close to the pin (to stop it falling into the engine if you are unlucky), pull the pin out (you may need to wiggle the cam slightly to the right to loosen it).
once you have removed the pin, put the pin in the next hole to the right on the cam gear, again you may have to wiggle the cam slightly to make sure the pin goes in all the way.
cover the offset washer over the pin and retighten the bolt to specs.

if the notch on the cam is slightly to the right:
pull the pin out but this time put it into the next hole on the left and then tighten everything back up.

rotate the crank a full 720 degrees to get back to tdc and then look at the notch on the intake cam again.
if all is good it will now be pointing to 12 o'clock, if not use the method above and adjust again.
Once the intake cam is good, repeat the procedure for the exhaust cam.
eventually both notches in the cam should point to 12 o'clock.


If you find you run out of holes on the adjustable cams your top timing chain might be a little stretched and might need replacing.

hope this helps set the cams for you
cheers
barnsey

I also remeber reading on the old forums somewhere that the 210 cams weren't adjustable so i don't know how you will go if you find the elusive 210 cams

[DQIKST]

+rep for the info barned.

but i think my cams are straight up. because they are in the original plumbing position.

i have 4 holes there i would like to know how to get max power out of them I.E advance the intake, retard the exhaust. or vice versa.

i will do a search for steve M thanks brett but i already have a VRS kit.

[Steve M]

Hey, DQIKST
Here's the stuff you requested from me. I thought I'd post it here where it can benefit everyone, rather than double posting it.

I vote the 88270 head as the best. In my eyes, it looks less likely to crack than the 88253, of which I have seen two cracked in the same place (not at all easily repairable)

Piston identification:

9.7:1 (88233) pistons:
6.3mm dome height, inlet valve cut out measures about 48mm at widest point.
Part number cast onto piston tang inside
"9.7" cast into piston crown

8.3:1 (88270) pistons:
3-3.5mm dome height, inlet valve cut out measures about 39mm at widest point.
Part number cast into piston tang inside

8.7:1 (88251) pistons:
4mm ish dome height, inlet valve cut out measures between 39mm and 48mm at widest point.
Part number cast into piston tang inside

8.5:1 (88232?) pistons:
3.5-4mm dome height,
"8.5" cast into piston crown.


Camshafts

88210 and 88231 camshafts take three-bolt, non-adjustable sprockets
88250, 88251 and 88270 camshafts take four hole, centre-bolt, adjustable sprockets.

Intake Cams:
cam type - lift (mm) - [email protected]", [email protected]", [email protected]"

88210 - 10.47 - 220.2^ - 580.2^ - 360.0^
88231 - 10.34 - 220.0^ - 581.6^ - 361.6^
88250 - 10.35 - 219.0^ - 584.0^ - 365.0^
88251 - 9.82 - 212.6^ - 572.8^ - 360.2^
88270 - 9.84 - 212.2^ - 580.8^ - 368.6^

Exhaust Cams:
cam type - lift (mm) - [email protected]", [email protected]", [email protected]"

88210 - 10.33 - 220.4^ - 361.0^ - 140.6^
88231 - 10.35 - 220.4^ - 362.4^ - 142.0^
88250 - 10.35 - 219.6^ - 360.8^ - 141.2^
88251 - 9.88 - 214.0^ - 364.0^ - 150.0^
88270 - 9.89 - 213.4^ - 358.0^ - 144.6^

Note:
^ indicates crankshaft degrees (divide by 2 for camshaft degrees)

All cam figures listed above are as we measured them from the cam, i.e 0.00mm valve clearance.

I intentionally haven't posted the total durations of any of these cams, as at 0.03mm valve clearance, the 88210 intake cam is actually a 300.4 degree cam.
I don't really think the world needs people boasting about stock 18RG cams being of 300degrees duration. That measurement just means that they have a lot of ramping and most likely don't idle as well as they could, or pass emission tests as easily as shorter duration cams.

[RA23]

Good info there Steve (sorry no rep as it told me to spread some around first).
Would you agree that the 250 cams would be the best compromise, as they are the highest lift and duration for the adjustable ones?