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kats

Datsun-240z Vs Fairlady-z432

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Here is a RB20 head joined with a L block . You are going to have same thing , fantastic ! 
http://sato1511.blog40.fc2.com/category47-2.html
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His video and blog gave me the idea! I'm in the process of rebuilding my front suspension. As soon as I finish this car I'll look into getting a rb30e head. I can only read some of the kanji so it's hard trying to figure out how he did it... But yeah thanks for mentioning him. His my #1 source for gathering information about this swap.


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7 hours ago, kats said:

Here is a RB20 head joined with a L block . You are going to have same thing , fantastic ! 

http://sato1511.blog40.fc2.com/category47-2.html

I was going to say that looks like an RB30 (SOHC) but then I remembered there is an RB20 SOHC as well as the DOHC version isn't there?

I wonder why you wouldn't use the RB30 though, since the ports are likely to be larger?

 

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6 hours ago, kats said:

About a Mikuni Solex carb , what everyone is doing about this , eight shape rubber gasket . This gasket is not listed on a service manual / parts catalog  because it is not meant to be disassembled. Please see the pictures, you see the eight shape groove on the cast jet block body . 

If this gasket deteriorated , fuel is not supplied correctly. However , overhaul kit never including this gasket .

This gasket is sold by a few venders . The gasket is described “ Factory Mikuni made “ .  I have some , yes I think they are genuine by the looks .

Each one cost 1000 JPY ( 10 USD ) ! How come this is available, while overhaul kit does not have it . Anyway , I have bought some from a local Mikuni service shop .

@nix240z , is there any chance to make this by your hand ? If demand is large enough , a price will be less than 10 USD ?

Kats

Hey Kats,

I noticed this also when I pulled mine apart, thought it was odd..

I found a vendor in the US that sells them however, as mine were so brittle when I removed them they broke into several pieces, they were more like plastic than rubber!

https://www.ebay.com/itm/TOYOTA-2000-GT-SOLEX-MIKUNI-40-PHH-CARBURETOR-GASKET-KIT/291845981988?epid=1642106380&hash=item43f3604724:g:GuAAAOSw6n5XsK8M:rk:15:pf:0

eBay seller Upgrade Motoring has all the parts from what I can gather.

https://www.ebay.com/usr/upgrademotoring

eg:

https://www.ebay.com/itm/MIKUNI-44PHH-CARB-GASKETS-REBUILD-KIT-W-PUMP-DIAPHRAGM-FIG-8-ORINGS-240Z-510-S30/142838570315?hash=item2141d79d4b:g:ct4AAOSw-RhaWVRn:rk:11:pf:0

This kit is good value.

https://www.ebay.com/itm/MIKUNI-44PHH-CARB-GASKETS-REBUILD-KIT-X3-W-PUMP-DIAPHRAGM-FIG-8-ORING-240Z-SOLEX/143029235076?hash=item214d34ed84:g:WdoAAOSwzhZb~HGW:rk:29:pf:0

Or this European seller has them for $3 each.

https://www.ebay.com/itm/SOLEX-40-PHH-MIKUNI-CARBURETOR-JET-CARRIERS-O-RING-8-SHAPED/292072596660?hash=item4400e224b4:g:iJwAAOSwJQdXDSoz:rk:22:pf:0

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6 hours ago, kats said:

By the way  , the left choke disc is an early type , the right one is later type . My spare set of Mikuni 40 PHH is an early type which has straight-head screw for securing top cover . They must have an early type choke disc but , later type is on .

Today Mr. Shimoura ( Hakosuka GTR And ZG owner ) gave me an old picture attached on a wooden frame , he told me the engine is for KPGC 110 ( Ken & Merry GTR ) because the oil cap is a black plastic , and the carburetors has Philip head screws for a top cover .And the choke disc is a later type .

Kats

I have both early and late but I never knew the fasteners were OEM. I just thought someone had replaced the phillips head screws with the other type! I've got a few pairs of 40's and about 5 sets of 44's now.. (I have a problem) but I love these carbs.

I forgot to mention above that with regard to the missing gaskets, I found the same problem with my SU carb rebuild kit, that the fuel filter screens, the crush washers and some gaskets were missing. The rebuild kit also didn't contain new floats, which I thought was odd if I'm honest. So it's not unusual that rebuild kits don't contain everything. I think in most cases the assumption is that you don't remove the jet block when rebuilding these carbs and just replace all the other gaskets and accelerator pump diaphragm? Who knows?

I had all my carbs completely disassembled and I vapour blasted them to look like new!

Photos here: https://www.viczcar.com/forum/topic/11264-safari-brown-i-mean-gold-the-nsw-project/?do=findComment&comment=205897

Before:

IMG_20180418_205543.thumb.jpg.3aca439589

After:

IMG_20180706_135912766.thumb.jpg.80c97d1

My SU's I rebuilt myself after having all fasteners plated and manifold + carb bodies vapour blasted.

IMG_20181122_174354.thumb.jpg.5a02d7e771

I should really order in the parts to finish my Mikuni rebuild's. Compared to working on SU's, I love the Mikuni's. They are easier in many ways to work with.

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I was going to say that looks like an RB30 (SOHC) but then I remembered there is an RB20 SOHC as well as the DOHC version isn't there?
I wonder why you wouldn't use the RB30 though, since the ports are likely to be larger?
 

Yes there's a RB20e and a RB20de. RB30e is the only 3.0 as far as I'm aware. Problem that I can see is mainly chamber volume because rb30e has Hemi style chambers. Would require custom pistons.


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Thanks Gavin , I did not know there are some venders out side of Japan . Even they includes the eight shape gasket ! No need to ask Steve . 

And thank you for sharing pictures of your jewels , you did it your own , having fun and saving a lot of money .

Here is a genuine Mikuni gasket kit just for your reference.

Kats

9AD1CEBC-B5DA-42A5-9DC1-8859D117A18C.jpeg

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7 minutes ago, kats said:

And thank you for sharing pictures of your jewels , you did it your own , having fun and saving a lot of money .

 

Trust me you don't want to see those... don't worry the joke may be lost in translation. 🙂

But on a serious note, I have fun doing the work myself and as you say you learn something but also save money. Plus if things don't work properly I only have myself to blame. ha.

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Hi Gavin , I still don’t get what they are joking about, let me review it again.

Today I have a question, what country was this red car be exported? 

The red must be #110 , RHD 260Z , And interesting turn signals and , it even got the fuel filler door knob !! 

This crisp and clean exterior make this car looked so beautiful , I wish we could’ve have this car in Japan . No exterior mirror , front grill, bumper over riders are my favorite features .

Kats

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Edited by kats
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It could be an AU market car, but we didn't have the turn knob on our fuel filler door. We had a lock.

Also we had 1 mirror on the driver's door. (No passenger mirror).

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I will have to look in the AU parts manual Kats to see what the part no. is for 260z springs. I am not sure of the spec, but I believe it's similar to European.

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I had a quick look in the parts manual for AU market cars and I see European (non European) Automatic and even Air-Conditioner fitted cars had different spring rates. Bit hard to make sense of it all to be honest. I see mention of spring rates, but not height.

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Hi , I picked up my spare S20 , I am so happy that now I can see it closely and I can list up what else I need for this engine . I see the head needs some fundamental work such as valve guide replacement, sheet ring replacement. 

And , the biggest problem is , No.  1 and No.5 Spark plug hole is something weired,

someone drilled the sparg plug ,then plug’s 

metal is remaining in the hole’s groove.

This makes me nervous, I have to find an engineer who can remove it and clean the hole . I don’t want a re-coil method if I can avoid.

Other than that , parts are all in good shape , I don’t think I need to put my NOS 

parts into this engine.I will use this original component as much as possible.

I will show you rest of parts when I am home .

Kats

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I think the same guy who works on your valve seats would be able to repair your spark plug issue.   Are those the exhaust valve seats that look so grunged?  But then, how does one complain about a 4-valve, cross-flow head?  Pretty cool, Kats.

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Someone probably stuffed the thread and tried to repair it.

Worst case a tig welder would be able to apply some new material, redrill it then retap.

It should be easy enough to fix.

Did you win this head on Yahoo! Auctions recently? I saw a head for sale a day or 2 ago?

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Thanks Chris , Gavin !

I hope the work will be easy . Also I am praying the head pass the leak test .The S20 is sometimes notorious for crack around valve sheet ring.

This one is not the auction one , but the seller is the same person from the auction one .

Kats

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Hi , my No.2 S20 Engine is confirmed for its good condition.

I couldn’t stop myself doing this , taking a picture of the S20 gears location. I guess Alan would took same photo when he was rebuilding his S20 . People would always ended up doing this !

Note : the two chains are original , it has old type shape. We say it is Hyotan shape . Nissan provides still now but they are oval shape. Although in the illustration , the chain looks oval type.

Kats

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Edited by kats
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A chain tensioner is adjustable manually . Don’t tight too much , no chain noise isn’t good , some noise is good for the chain.

I tried to display the electrical ignition system , but I didn’t want to open the plastic bag because I have got the used complete set from the seller of the spare engine.

Note : S20 comes with Mitsubishi components such as a starter/ an alternator/ a distributor/ a voltage regulator / a transistor ignitor.

Kats

 

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The pistons, I found a cool thing , original pistons are numbered on top face , from 1 to 6 . On the other hand,  a new piston which I have  is supplied from Nissan is not stamped on it . 

Cylinder liners are NOS . The original pistons are very nice . But I am wondering can I put original pistons into the each corresponding cylinder even if I use a set of new cylinder liners?

Kats

 

Kats

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A common trouble of the  tensioner , as the bolt pushes the the collar, a plastic bush inside of the collar gradually collapsed, finally the gear scratches the collar, then break it . 

My spare engine’s tensioner  has slightly worn out ,  so I will replace it with a NOS one .

And the chain guide which is located between the camshafts , there is also a common trouble of cracking at the both sides of the ends .  As the chain goes to be flexible, bounces on the guide , it makes the guide stressful.

Courtesy Mr.Watanabe ( owner of PS30-00063 ) for the pictures which show a damage for each parts.

Kats

 

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Edited by kats
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Hi , I looked at the cylinder block , now I understood how S20 is made . I see now water line , oil line , and each holes has each purpose.

At the rear end of the block , “B73” on it . This is stamped on the every crank cap .And this code must be on the left side of the block with a brush paint which is made by quite bigger strokes . I haven’t seen it yet, so that will be my next challenge.

And the oil pan , it is bigger than the L-series Engine. Max is 6 litter, I am feeling this Engine becomes nicer about oil pressure when the oil quantity less than 5 litter.

Kats

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Edited by kats
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Is this intake valve stem guide modified ? For better air flow ? Ex valve guide looks normal .I doubt some hand work was done in the past . I feel same thing when I viewed from In / Ex port , it has slightly grinded around the hole for the stud bolt . I need to check my NOS head .

About the front gear housing cases , they have a same number for each . My spare has “15” on them , because these cases were bored at the same time . 

Kats

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Edited by kats
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