87 22r block into an 85 22re?

tmcorbin · 10-29-2009, 07:58 PM

The 22re in my 85runner is knocking more and more, and burning more and more oil. I have the 22r from my our 87 project truck on the stand and ready to go to the machine shop, and have started cleaning and painting all the bracketry.

Question is can I rebuild the 22r block , new head and such and put it into the 85runner, and hook up all the EFI to it. will all the sensors and what not from the re work on the r block. from looking at the two blocks it looks like they are pretty much the same.

Thanks

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rsidner · 10-30-2009, 08:28 AM

Is your 87 motor in long block form right now? That would make it easiest because then you won't need to worry about head differences. Around 85 they stopped using raised pistons and open combustion chamber heads and started using flat pistons.

I can tell you flat off that if you are using the full 87 long block you will be fine. The 87 22r was designed to be both carb or efi so you can bolt up ALL of your efi stuff straight to the 87 head.

The only thing that you might need to do is drill and tap your block for a knock sensor and that's it. Just remember that the AC compressor is different between carb and efi models so make sure you use your efi AC compressor and bracket.

Good luck. I went through about the worst EFI conversion possible and mine was still successful so I'm sure you'll be fine (converted a motor that was never ever designed to run EFI to EFI...it is an '83 long block in an '84 4runner).

abecedarian · 10-30-2009, 10:53 AM

If the 85 engine is an honest 85, the 87 should bolt in place, no modifications except blocking the fuel pump mount point on the 87 22r with the block-off from the 85 22re.

tmcorbin · 10-30-2009, 06:51 PM

Thanks for the knowledge. I should have put a little more info in the start of the thread.

I have the 87 22r completely disassmebled, It has flat top pistons. My plan was take the block/crank/rods to the machine shop get them checked, find out what sizes I am going to need for everything. I know it is going to need over size pistons, just how much I dont know. Also get the crank and rods checked, if they are good have them polished and/or line bored if needed. From that I should know what size bearings and pistons I need. Then I was going to order a master rebuild kit from enginebuilder, with the street rv head and 261 cam. put it all together and drop it in to the 85.

I was going to strip the 85 down of the efi, exhaust, ac compresser and all off in the engine bay of the 85 and then drop the rebuilt 87 in and hook it all back up.

That way my 85 dd will not be off the road for more than a weekend if everything goes well.

I dont know if the current engine in the 85 is a true 85 or not. I know that the po stated he believes it had an engine swap at one time. I can tell you that it has flat top pistons. I used a video probe in the cylenders to try and get a better look at were is burning the oil from.

From wheeling the 87 block out and putting it next to the 85runner, if there is a difference in the blocks I can not see it.

can you post a picture of were the knock sensor is, so I can locate it and see if the 87 block will need it.

Thanks

brownbagg · 10-31-2009, 09:00 AM

if the head exhaust port are pear shape, its a true 85. the 85 and 87 are the exact same motor, except for the carb itself. the 87 will have the knock sensor already threaded

abecedarian · 10-31-2009, 09:49 AM

Compare the 85 block to this pic and if they look the same, it's an 85-up block.

more information here: http://www.lcengineering.com/TechNotes/TechNote49.htm

abecedarian · 10-31-2009, 09:52 AM

Look on the intake side of the 85 block. If you only see the oil filter, fuel filter and oil pressure switch / sending unit then there is no knock sensor.

tmcorbin · 11-01-2009, 06:02 AM

Cool, Thanks, I'll get out there today and check all this.

Thanks

10-30-2009, 06:51 PM	#4 (permalink)
tmcorbin Registered User Join Date: Jul 2009 Location: Eastern NC Posts: 149	Thanks for the knowledge. I should have put a little more info in the start of the thread. I have the 87 22r completely disassmebled, It has flat top pistons. My plan was take the block/crank/rods to the machine shop get them checked, find out what sizes I am going to need for everything. I know it is going to need over size pistons, just how much I dont know. Also get the crank and rods checked, if they are good have them polished and/or line bored if needed. From that I should know what size bearings and pistons I need. Then I was going to order a master rebuild kit from enginebuilder, with the street rv head and 261 cam. put it all together and drop it in to the 85. I was going to strip the 85 down of the efi, exhaust, ac compresser and all off in the engine bay of the 85 and then drop the rebuilt 87 in and hook it all back up. That way my 85 dd will not be off the road for more than a weekend if everything goes well. I dont know if the current engine in the 85 is a true 85 or not. I know that the po stated he believes it had an engine swap at one time. I can tell you that it has flat top pistons. I used a video probe in the cylenders to try and get a better look at were is burning the oil from. From wheeling the 87 block out and putting it next to the 85runner, if there is a difference in the blocks I can not see it. can you post a picture of were the knock sensor is, so I can locate it and see if the 87 block will need it. Thanks __________________ 85 4runner 22re, 170K, clean and straight. Still working through 20 years of scheduled maint. Future plans, engbldr street RV head, cam and OS valves, engbldr over haul kit, Marlin Crawler trany rebuild kit, T-case rebuild, 2" lift, interior, repaint. Currently 20mpg, Sound great, using 1qt of oil every two days.

11-01-2009, 06:02 AM	#8 (permalink)
tmcorbin Registered User Join Date: Jul 2009 Location: Eastern NC Posts: 149	Cool, Thanks, I'll get out there today and check all this. Thanks __________________ 85 4runner 22re, 170K, clean and straight. Still working through 20 years of scheduled maint. Future plans, engbldr street RV head, cam and OS valves, engbldr over haul kit, Marlin Crawler trany rebuild kit, T-case rebuild, 2" lift, interior, repaint. Currently 20mpg, Sound great, using 1qt of oil every two days.

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10-30-2009, 08:28 AM	#2 (permalink)
rsidner Registered User Join Date: Jun 2008 Posts: 31	Is your 87 motor in long block form right now? That would make it easiest because then you won't need to worry about head differences. Around 85 they stopped using raised pistons and open combustion chamber heads and started using flat pistons. I can tell you flat off that if you are using the full 87 long block you will be fine. The 87 22r was designed to be both carb or efi so you can bolt up ALL of your efi stuff straight to the 87 head. The only thing that you might need to do is drill and tap your block for a knock sensor and that's it. Just remember that the AC compressor is different between carb and efi models so make sure you use your efi AC compressor and bracket. Good luck. I went through about the worst EFI conversion possible and mine was still successful so I'm sure you'll be fine (converted a motor that was never ever designed to run EFI to EFI...it is an '83 long block in an '84 4runner).

10-31-2009, 09:00 AM	#5 (permalink)
brownbagg Registered User Join Date: Jan 2006 Posts: 89	if the head exhaust port are pear shape, its a true 85. the 85 and 87 are the exact same motor, except for the carb itself. the 87 will have the knock sensor already threaded