Toymods Car Club Inc: Tech & Conversions => hilux oil pump into 18r engine???

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RT104GT
Regular

Location:
Western Victoria
Registered:
September 2004

Re: hilux oil pump into 18r engine???	Tue, 07 September 2004 05:12

Re 18RG oil pumps, 18RC oil pumps etc. a few facts... The 18RG oil pump has more capacity than the 18R/RC oil pump, it has a 22 mm metal insert and a larger rotor/vane. Apart from that 18RC and 18RG oil pumps are identical in drive except that to run the 18R oil pump in a G engine they use a blanked off keyway where the distributer used to go which is used to drive the oil pump only. 18RG oil pumps are not driven off the front timing gear only the distributer is via the worm gear on the end of the dummy oil pump drive shaft, which is put in place of the single cam shaft. In answer to the guys query about a Hi Ace oil pump, the 18RGEU oil pump which is the GT versions is as good as it gets. Its job is to drive oil up to both twin cams via the oil galleries in the twin cam head and as such is superior to any later versions as it was designed for its task and ran in European Rally Celicas for ages with no failures. You can convert any 18R or 3T engine to twin cam by using the dummy oil pump shaft, the Tee piece dummy dizzie drive gear and a new front timing cover and gears/chain drive. The old dizzie even fits. Toyota have been making twin cam engines all my life and the direct conversions were 2R/4R into a rare 9R al la GT5 1967. The 8RC ex 1900SL coupe converts to an 8RG 1900GSL 1972, 18RC converts easily to an 18RG 1974 through to 1979, The 2T/3TC converts into a 2TG/3TG. Only thing is the pistons are flat in C single camshaft engines and recessed in G twin camshaft engines making provision for the offset valves. So if you contemplate converting a single cam engine you need to fit pistons as well. All G engines have the engine number stamped upside down when compared with C engines so that the assemblers would know to put the right pistons in as the engines came down the assembly line. All G engines have higher pressure/capacity GT oil pumps as can be checked by the part numbers on the Toyota micro fiche which makes sense as the oil has to go further around the galleries [Updated on: Tue, 07 September 2004 05:23] [Report message to a moderator]

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