ca18det head on c20e block?

[broke car= broke wallet]

this is my first post ever so bear with me. a freind of mine is selling 2 1987 200sx's, both with the ca20e in them. the one that he had been driving blew it's head gasket. what i wanted to know is, would the ca18det head mate with the single cam block. are the head gaskets the same?

[azrps13]

Read this post... http://www.that dead forum/sh...=ca20

[sdtouge]

interesting stuff...

[broke car= broke wallet]

i found out later today that the parts car(the one that didn't run) is an se. this would mean that this car is a ca18et. i don't know yet why it does not run, b/c it did not run when he bought it for parts. would swaping this head, manifolds, turbo, ecu and wires make much power? if i were to do some thing like this, i would plan on replacing the piston rings, reseating the valves and resetting the valve lash in the head.

[Dattebayo]

Quoted from that site:

"O.K you need a CA20 crank, CA18 front timeing belt pully, late model CA20 front pully system, stock CA20 rods, Toyota 4A-GZE pistons, CA20 8 bolt flywheel, CA20 oilpump, new bearing and seal etc

You need it mod the CA18 front timeing pully, you need to machine a bush that will fit in the CA pully, and that has a hole and slot in it to attach to the CA20 crank.

This is for a CA18 block.

For a CA20 block you need to relocate a tensioner, make a new timeing belt pully and lathe the pistons down 2mm or so to clear all the valves."

Is all that really true or what. It just seems too easy that Toyota pistons would bolt right up to Nissan rods...

[fraz]

Thats not right.

toyota 4a** pistons are 81mm bore. I dont think they would fit a 84.5mm ca20 block.

Also, the ca20 crank is 6 bolt, not 8.

You can run any front pulleys, but you need the lower timing belt pulley off the ca18de/det and an bush to fit it to the smaller nose on the ca20 crank.

You also need the lower timing cover off the de/det, and the lower idler pulley off the de/det which needs to be drilled and tapped into the front of the block. There is a blank spot on the front of the block where it goes.

Stock ca20 rods are not very strong. I dont think they would last very long.

Heres one i prepared earlier

[broke car= broke wallet]

another thing i wondered about is the timing belt. if the ca20 block has a taller deck height, would the ca18de/t timing belt fit an d just be tight or haw would that work?

[fraz]

its too short.

you have 3 options.-get either a honda h22a or skyline timing belt, and get it narrowed from 22mm(h22a) or 24mm(rb20/25/26)-Get one from bando usa, they make stock nissan ones. I cant remember the part number, but ill dig it up if you want. I didnt go with them because they quoted me a 16 week waiting time as they had none in stock

-Get a custom one form econobelt. They quoted me $us 23.70 per belt for one that was 1 tooth too many but the correct width. I just turned the tensioner to take up the slack and it was all good.

The specs you want is 155 teeth, 19mm-3/4 width, HTD-8 profile (8mm pitch) The one i got from econobelt was 156 teeth but it worked all good.

You will also have to do somehting about your head bolts. ca20 ones wont fit the de/det head and de ones wont fit the ca20 block.

I modified some other nissan ones to fit, but i got custom ones for the later ones i built.I can give you part numbers if you want.

[boost_boy]

its too short.

you have 3 options.-get either a honda h22a or skyline timing belt, and get it narrowed from 22mm(h22a) or 24mm(rb20/25/26)-Get one from bando usa, they make stock nissan ones. I cant remember the part number, but ill dig it up if you want. I didnt go with them because they quoted me a 16 week waiting time as they had none in stock

-Get a custom one form econobelt. They quoted me $us 23.70 per belt for one that was 1 tooth too many but the correct width. I just turned the tensioner to take up the slack and it was all good.

The specs you want is 155 teeth, 19mm-3/4 width, HTD-8 profile (8mm pitch) The one i got from econobelt was 156 teeth but it worked all good.

You will also have to do somehting about your head bolts. ca20 ones wont fit the de/det head and de ones wont fit the ca20 block.

I modified some other nissan ones to fit, but i got custom ones for the later ones i built.I can give you part numbers if you want.

Excellent info and thanks for not being selfish.

Dee

[broke car= broke wallet]

thanks alot for the info. if you don't mind telling, what kind of results are you getting with this motor setup? i'm looking at either this setup or a ka24de-t. the main problem i have going with the ka is it's harmonics. i want to make sure that if i build the ca20det, that it will withstand a lot of abuse.

[broke car= broke wallet]

after looking at the 2 200sx's today i found out that the se has no transmission, intake manifold, a few suspension peices, and some of the interor is missing. i only want the motor and trani out of the ca20e car. the rest of that car and the parts car i would sell for about 300 negotiable if anyone was interested. of course i haven't bought them yet, so this is really hypothetical.

[fraz]

I have some forged rods out of a mitsi 4g63t/4g63bt that im going to use. There are 3 types.The early ones are the strongest (like near bulletproof-but heavy), but the bottom end is 4mm too wide for the ca crank. You can get them narrowed easily, but then you need different bearings and it costs more to get the notch put in to hold them.

The evolution ones (evo1-3) are only 2mm too wide and are still very strong, not as strong as the early ones(vr4) but will still hold 400-500hp no sweat. The good thing, is you can get them narrowed (1.05mm off each side i think) and still run stock evo bearings.

The latest ones are lighter still (evo4+) but good for around 400hp i guess. Im not sure exactly, but there are plenty of 400hp evo's in nz running stock motors with just more boost an external gate and an exhaust.I dont know what the differences would be in size, i know they were built lighter so they rev better.

The early ones use a 22mm pin, but the evo ones use a 21mm pin.

For pistons you can use 4g63 ones as there are many different shape tops available, but they are 85mm diameter and i would not like to take any more out of a ca20.Honda pistons will fit and are readily available.http://www.theoldone.com/components/pistons/

AND they have a 21mm pin

here is a pic of the evo2 rods im using compared to some ca18det rods.

[fraz]

forgot to mention, 4g63 rods are longer than ca20 ones, something like 1mm i think. If you get honda pistons you have to specify the pin height you want to get the comp ratio you want.ca20 is 149mm possibly 149.3, i cant remember.4g63 is 150mm

[broke car= broke wallet]

forgot to mention, 4g63 rods are longer than ca20 ones, something like 1mm i think. If you get honda pistons you have to specify the pin height you want to get the comp ratio you want.ca20 is 149mm possibly 149.3, i cant remember.4g63 is 150mm

are you sure that they are only 1mm longer b/c the pic you posted makes the 4g63t rods look closer to 10mm. i'm a bit confused...

[Dattebayo]

You got it backwards, but i am still skeptical...

They said put toyota pistons in the CA18 block.This kind of changes what you said, but im not sure of the CA18DET's bore width.

I know its a little confusing the way the guy worded it, but i am sure that is waht he meant, saying that you have to machine a few MM's off the tops of the pistons and all (it makes more sense).

[fraz]

are you sure that they are only 1mm longer b/c the pic you posted makes the 4g63t rods look closer to 10mm. i'm a bit confused...

The 4g63 rod is on the left, ca18det rod on the right. CA20 rods are around 18mm longer than ca18det.

You got it backwards, but i am still skeptical...They said put toyota pistons in the CA18 block.This kind of changes what you said, but im not sure of the CA18DET's bore width.

I know its a little confusing the way the guy worded it, but i am sure that is waht he meant, saying that you have to machine a few MM's off the tops of the pistons and all (it makes more sense).

The toyota 4age/gze pistons are only 81mm, they wont fit!

I said you can run honda pistons, you just might have to mill the tops down depending on the pin height of the ones you get

[broke car= broke wallet]

ok cool. i failed to see that the pic had a ca18 rod and not a ca20. my bad

[broke car= broke wallet]

a little off topic, but will an after market ca18det clutch fit into the ca20e motor and trani, b/c from what i understand the bellhousings are the same and the crank shaft bolt patterns are the same.

[fraz]

DE/DET crank is 8 bolt, all CA sohc are 6 bolt crank.You could probably put a DET clutch and pressure plate on a sohc flywheel, but the sohc wlywheel would need some serious weight reduction, its massive

[Dattebayo]

What honda piston is 83mm?

And the CA is an interference motor, right?

How much clearance should the pistons have from the top of the cylinder?