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'87 Toyota 4Runner... repair or swap 20R engine?
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dorunrun
New User
Jan 20, 2009, 12:21 PM
Post #1 of 2
(2415 views)
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'87 Toyota 4Runner... repair or swap 20R engine?
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1987
Toyota
4Runnner
20R (previous owner replaced 22RE with a 20R+carb) 
220,000 miles
Intro:
Ok, I blew the head gasket in my 4Runner Jan 2008.
I had the head resurfaced and checked for cracks
and warpage and it turned out good. I also pressure
tested the cylinders and all checked out good.
So I reinstalled everything, but couldn't get it to run
right. It idled really rough and spit and sputtered bad.
So I got fed up and let it sit for over a year. It's just
difficult for me to make sure everything is working as
it should because of all the mix-matched parts.
So now I want to get it running again, but the engine
has a lot of powder-like surface rust throughout the
inside the coolant chambers and i don't know how to
remove it.
The stuff at Autozone says it needs run through the
system with the engine running, but the truck doesn't
run.
Question #1:
Is their a way to remove the surface rust inside the
engine" having to run the engine?
Question #2:
Should I just buy a 22RE engine, replace the the carb
with EFI and put everything back the way it should be?
Question #3:
If I decide to put it back to the original 22RE w EFI,
what else will I need to be sure that I have everything
necessary for the swap?
I'm thinking about buying this setup:
--> 22R engine w/ head on ebay
Thanks for the help. I know it's long, but I just don't
know which is the better option, rebuild or replace.
-- Gaston
(This post was edited by dorunrun on Jan 20, 2009, 12:29 PM)
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Loren Champlain Sr
Veteran
/ Moderator
Jan 20, 2009, 5:30 PM
Post #2 of 2
(2410 views)
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Re: '87 Toyota 4Runner... repair or swap 20R engine?
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Gaston; At this point, I'd be more concerned if I could get it running correctly, first. The surface rust or oxidation you are seeing isn't that much of a worry. A couple of system flushes should take care of that once it's running. Cam timing, as with any engine, is crucial. Make sure your marks are correct. On the chain driven 20R or 22R(E), there are special links on the chain that must align correctly with the gears, otherwise, it'll never run right. If this vehicle was, originally, injected, that's how it should go back together. The onboard computer won't be able to control a feedback carb. If originally carb, same, the computer won't be able to control the EFI.
Loren
SW Washington
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