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Upgrading DENSO Injector 4-hole, will it cause problems?

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4.1K views 16 replies 3 participants last post by  71Corolla  
#1 ·
My injectors o-rings are cracking, any potential issues in upgrading to a 4-hole spray?
 
#3 · (Edited)
Car is running but is extremely underpowered. So I figured I changed the oil pump again since it's cheap and this time I took out the oil "V" filter and it was filled with crap (metal fragments).

So replaced everything new. Here's my Instagram if you want more pics, I get tired of uploading to imgur...

NEOREBU

I also have an old PCV valve with a bottleneck PCV Rubber Line. So I'm replacing that now as we speak...




Anyways weird thing is 23250-74100 shows both the 4-hole and the 2-hole chamber injectors? Anyone know the differences?
 
#7 ·
Please forgive the hijack, but 71Corolla or someone, could you please explain about the service bolt and the reason for it? I looked at my FSM and see that it said to install one before removing the cam. I saw a wave washer was involved so is the cam gear spring loaded for clearance or something like that. I have never had a head problem so I an ignorant in this area of the engine.
W95c
 
#8 ·
I asked an engine rebuilder why the exhaust cam gears are split he told me it is to reduce noise. The gear halves are spring loaded so if you remove the cam without the service bolt the gears will become misaligned, although there is a pin that prevents the gears from completely spinning out of alignment. If you remove the gear without the service bolt you can get them back into alignment by prying/rotating the gears using a screw driver via the service bolt hole, then thread in said bolt.
 
#12 · (Edited)
Correct number for your car:
23209-74100
23209-74140 cali spec

Part 23209-74100 (INJECTOR ASSY, FUEL) was found on the following models:

Date range Model Frames/Options Found in diagram
01/1990-05/1995 TOYOTA MR2 SW20,21 22-11: FUEL INJECTION SYSTEM

09/1989-08/1993 TOYOTA CELICA AT180,ST18* 22-11: FUEL INJECTION SYSTEM

09/1993-07/1999 TOYOTA CELICA AT200,ST204 22-11: FUEL INJECTION SYSTEM

06/1991-07/1996 TOYOTA CAMRY SXV10,VCV10,MCV10 22-11: FUEL INJECTION SYSTEM

08/1996-06/2001 TOYOTA CAMRY SXV2*,MCV2* 22-11: FUEL INJECTION SYSTEM

09/1991-06/1996 TOYOTA CAMRY SXV10,VCV10,MCV10 22-11: FUEL INJECTION SYSTEM

07/1996-06/2001 TOYOTA CAMRY SXV20,MCV20 22-11: FUEL INJECTION SYSTEM

06/1998-11/2002 TOYOTA SOLARA ACV20,MCV20,SXV20 22-11: FUEL INJECTION SYSTEM

11/1995-07/2000 TOYOTA RAV4 SXA1* 22-11: FUEL INJECTION SYSTEM