Author Topic: 22r with 20r head (Read 4896 times)

yotaofdoom11 · « **on:** Mar 02, 2009, 11:34:49 PM »

my question is simply this: i want to build a 22r with a 20r head, what specific parts do i need and out or off what year 22r do i need them from. from what i've been told there is a differance between two groups of years, but beyond that my knowledge is limited.

Marlin · « **Reply #1 on:** Mar 03, 2009, 12:11:01 AM »

There are two family's of R engines.

'75 to '84 20 and 22R's: thick 100mm head, tall pistons and block with a 98 pin timing chain.
'85 to '95 22R's: thinner 96mm head, flat top pistons and shorter block height with a 96 pin timing chain.

Therefore, you must use an '81 to '84 22R short block. Oil pan, timing cover, and valve cover can all be reused.

Marlin

boobap · « **Reply #2 on:** Mar 03, 2009, 10:07:01 AM »

does the year matter for the 20r head? i have heard something about valve sizes?

79coyotefrg · « **Reply #3 on:** Mar 03, 2009, 10:23:14 AM »

Quote from: boobap on Mar 03, 2009, 10:07:01 AM

does the year matter for the 20r head? i have heard something about valve sizes?

any year 20R can be used, to my knowledge all 20R's had the same size valves, however all 20R heads didnt have the mounting for the pwr steering pump

i ran a 79 20R head, intake, timing cover, oil pump, on a 82 model 22R block for a few years, it was VERY fun to drive

btw run the aluminum rocker arms,

yotaofdoom11 · « **Reply #4 on:** Mar 03, 2009, 12:13:13 PM »

thanx marlin, now i know i have the wrong short block, no biggy though it was free

boobap · « **Reply #5 on:** Mar 03, 2009, 12:36:06 PM »

what do the aluminum rocker arms come off of? the 22r, 20r or aftermarket?

79coyotefrg · « **Reply #6 on:** Mar 03, 2009, 12:47:24 PM »

Quote from: yotaofdoom11 on Mar 03, 2009, 12:13:13 PM

thanx marlin, now i know i have the wrong short block, no biggy though it was free

you can use the crank shaft and connecting rods from a 20R,22R or 22RE of any year they are all the same

oil pump drive and timing gear are the only difference and they are easily swapped out

Quote from: boobap on Mar 03, 2009, 12:36:06 PM

what do the aluminum rocker arms come off of? the 22r, 20r or aftermarket?

22R's had them, also aftermarket but be careful, i have seen some "aftermarket" rockers (autozone) come apart

yotaofdoom11 · « **Reply #7 on:** Mar 03, 2009, 01:29:12 PM »

cool then i may still have all the rite stuff, just a few swaps and im golden

GreenYoterKrawler · « **Reply #8 on:** Dec 27, 2010, 05:49:50 AM »

I know this is an old post but oh well. I have an 81 22r. if i wanted to do the 20r head swap what all do i need?
1. Must haves
2. Luxury add ons ex. aluminum rocker arms, spring uprgrades/rebuild
thanks guys or just give me a good link, that works too

stevesyota · « **Reply #9 on:** Dec 30, 2010, 06:39:42 PM »

When putting a 20R head on a 22R engine give you more power?

Hottrod81 · « **Reply #10 on:** Dec 30, 2010, 06:52:30 PM »

It will give you more high end power but will not help you down low where you need it.

81_yota · « **Reply #11 on:** Dec 30, 2010, 07:14:51 PM »

give u high end power but if u use a rv cam will help u regain your low end tq

stevesyota · « **Reply #12 on:** Dec 30, 2010, 07:46:56 PM »

Thats some good info.

81_yota · « **Reply #13 on:** Dec 30, 2010, 07:52:57 PM »

im currently doing something i have 3 early 22rs with a 20r head so i have seen some very nice builds to do one tip top anywhere from 500_1k if u get in to porting making valves bigger ect some guys claim 180hp but im looking for a lil more td myself so im goin for it

THE ROCK · « **Reply #14 on:** Dec 31, 2010, 11:09:35 AM »

I agree, I have the spin the engine (22R 20r head)around 3 grand to make power..its exellent on the highway..not the best for low end grunt...got gears?

GreenYoterKrawler · « **Reply #15 on:** Jan 02, 2011, 06:09:36 AM »

Would the 20r head and rv cam still meet CA smog? thats the only thing holdin me back

santa cruz crawler · « **Reply #16 on:** Jan 02, 2011, 07:27:21 AM »

If your truck came w a 20R vin tag then it will appear stock
Other than having lo co levels and all your smog stuff working properly
Including the evap system you should be fine just tell them
Is stock rebuild, Pre test is good to do also some times they are free!!

Good luck. The only reason I don't do this swap is the power steering bracket .

81_yota · « **Reply #17 on:** Jan 03, 2011, 05:04:27 PM »

yes the least amount of info u give them better your chances are i know someplaces they dont like upgraded motors where i live i dont have to worry about smog so yay for me i know theres guys from cali runnin the hybrid setup

stevesyota · « **Reply #18 on:** Jan 03, 2011, 07:26:44 PM »

That's the thing with California it all revolves around smog since they didn't follow the 25 year rule just because the truck came with smog equipment on it. I think the muscle cars out there are putting out way more pollutants than I am.

81_yota · « **Reply #19 on:** Jan 03, 2011, 07:44:47 PM »

i bet they are but i know this if your using it as a dd you fall into a certian category and have to meet that

stevesyota · « **Reply #20 on:** Jan 03, 2011, 07:49:24 PM »

That's my goal I want to build a rig that is streetable and able to handle the trails. I'm not looking for the competition rig. Something like the Marlin rig

81_yota · « **Reply #21 on:** Jan 03, 2011, 08:27:12 PM »

yeah i hear ya theres ton of guys here that are build build i want a dd a trail nothing crazy so thats why im doin a hybrid might wanna ask 79coyote ask for him in shout box is where i see him mostly

79coyotefrg · « **Reply #22 on:** Jan 05, 2011, 08:59:46 PM »

81_yota · « **Reply #23 on:** Jan 05, 2011, 09:02:56 PM »

there he is this guy will have all info you will need on the hybrid

santa cruz crawler · « **Reply #24 on:** Jan 06, 2011, 05:26:14 AM »

The rock ninja!!

yotaofdoom11 [OP]

yotaofdoom11 [OP]

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