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Location:
Tamworth
Registered:
August 2004
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Re: 18RG same as a 18RC??
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Thu, 03 March 2005 07:18
 
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i researched the exact same thing.
if u want the low down here goes
You are better off getting a complete 18R-G (or 18R-GU or EFI 18R-GEU).
It will be cheaper than getting the bits individually.
The 18R-C and 18R-G blocks are identical.
Only difference is that the hole for the oil dipstick is drilled on the
left side for the 18R-G and the right side for the 18R-C (both blocks
have both bosses but only one is drilled out - you can drill out both
and plug either one).
The standard exhaust system for the 18R-C is way too small for an 18R-G.
Gearbox and engine mounts are the same.
Fuel supply is the same.
Radiator is the same.
Electrics are the same (minor change required for 18R-GU or 18R-GEU
electronic ignition but it's simple bolt on stuff).
If the new engine has EFI then make sure you get the igniter and coil,
otherwise you need to go chasing one or converter back to points.
The carbies are on the other side of the engine, so you need to shorten
the rods that connects the accelerator pedal to the carbies.
The entire bottom end is interchangeable (18R-G pistons are
higher compression but the pistons and rods are interchangeable as a
unit).
The lower timing chain is the same for both engines.
You need the following from an 18R-G
- upper chain
- upper chain tensioner
- upper chain guides (2 at $150 each)
- timing cover
- sprocket between upper and lower chains, plus its bolt
- head gasket (18R-C can be modified but why bother)
- head plus everything that attaches to the head (thermostat housing,
cams, valves, etc)
- inlet manifold and carbies or EFI system (manifold differs for EFI but
both bolt to the same head)
- air filter box
- accelerator rods or custom made cable
- exhaust manifold
- dizzy (and igniter if using electronic ignition from an 18R-GU or
18R-GEU)
- oil pump (can modify an 18R-C oil pump to use a shorter filter which
clears the carbs)
- probably a few small things I forgot
So, as I said, its much easier and CHEAPER to buy a complete 18R-G.
The 18R-C carby can NOT be used on the 18R-G.
The manifold is different and the 18R-C will not provide enough air or
fuel for decent power levels (and why bother installing an 18R-G if you
don't want decent power).
Qouted from Stepho.
Just recently found out that 18rg cranks are forged and rc is not. and perhaps with the rods also, supposdely. i cant back this up but some 1 on this forum was pretty sure about this. and i beleive him so yer.
Hope this helps.
[Updated on: Thu, 03 March 2005 07:21]
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| | Subject | Poster | Date |
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18RG same as a 18RC??
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79Rona | Thu, 03 March 2005 04:37 |
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Re: 18RG same as a 18RC??
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Jason | Thu, 03 March 2005 04:45 |
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Re: 18RG same as a 18RC??
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79Rona | Thu, 03 March 2005 04:48 |
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Re: 18RG same as a 18RC??
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Major Clod | Thu, 03 March 2005 05:27 |
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Re: 18RG same as a 18RC??
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79Rona | Thu, 03 March 2005 05:30 |
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Re: 18RG same as a 18RC??
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TA-022 | Thu, 03 March 2005 07:08 |
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Re: 18RG same as a 18RC??
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jeffro RA28 | Thu, 03 March 2005 07:18 |
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Re: 18RG same as a 18RC??
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people100 | Thu, 03 March 2005 07:37 |
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Re: 18RG same as a 18RC??
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jeffro RA28 | Thu, 03 March 2005 08:20 |
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Re: 18RG same as a 18RC??
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79Rona | Thu, 03 March 2005 09:11 |
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Re: 18RG same as a 18RC??
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TA-022 | Thu, 03 March 2005 09:26 |
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Re: 18RG same as a 18RC??
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polson | Thu, 03 March 2005 09:34 |
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Re: 18RG same as a 18RC??
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river | Thu, 03 March 2005 09:40 |
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Re: 18RG same as a 18RC??
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RA40Celica | Fri, 04 March 2005 02:57 |
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Re: 18RG same as a 18RC??
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jeffro RA28 | Thu, 03 March 2005 09:55 |
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Re: 18RG same as a 18RC??
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79Rona | Fri, 04 March 2005 04:15 |
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Re: 18RG same as a 18RC??
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goonman86 | Sat, 05 March 2005 01:40 |
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Re: 18RG same as a 18RC??
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79Rona | Sat, 05 March 2005 02:35 |
