2F head Casting 61010 info needed - which replacement head will work

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arcteryx

arcteryx

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I have a client who isnt very technical so I am trying to help her out. She has a south american FJ40 with a cracked head. Its a 1980 truck, but the month is unknown. Her head is 61010. The DD/MM is 07/08 which is on the block. Her block is 11411-61013

Will the 2f 61030 or 61040 heads work? I cant find much about this 61010 head as it appears to be a non-US head. TIA.
 
If it's a 61010 head, the 61030 is a good match. As Bear said, air injection ports will be present on US models, so you'll need some plugs. Other than that, you'll be fine. 61030/31 are better choices for your app than the 61040.:)

Best

Mark A.
 
thanks for the replies. is there a way to tell if this block has domed or flat pistions by the block numbers provided?
 
Thread dredge.

A 61010 head passed through the shop recently. I have no idea where I got it. A closed chamber head was needed to put an engine together, so I grabbed a greasy closed chamber head off the shelf, sent it to the machine shop. After it was installed, I noticed several things I hadn't paid attention to before.
1. The year date code was 1, so it was a 91 or 2001.
2. it had the full 3F manifold surface, but maybe even bigger than the 3F 61040 heads we got in 86-87.
3. the casting number was 61010.

All together on top of a 4.3L block w/ flattops it runs great.

Pics:
DSC08286.webp
DSC08288.webp
DSC08287.webp
 
Wow, it's amazing the differences between them. And the pics are definitely helpful!

Jim- I told her to bring the truck to Austin's cruiser shop, Land Cruiser Specialist (Edwin) as her mechanic didnt sound too competent. I never heard from her since. I'll ask Edwin if he has heard from here since.
 
FJ40Jim said:
Thread dredge.

A 61010 head passed through the shop recently. I have no idea where I got it. A closed chamber head was needed to put an engine together, so I grabbed a greasy closed chamber head off the shelf, sent it to the machine shop. After it was installed, I noticed several things I hadn't paid attention to before.
1. The year date code was 1, so it was a 91 or 2001.
2. it had the full 3F manifold surface, but maybe even bigger than the 3F 61040 heads we got in 86-87.
3. the casting number was 61010.

All together on top of a 4.3L block w/ flattops it runs great.

Pics:
View attachment 859953View attachment 859954View attachment 859955
Click to expand...
Jim, just saw these pictures, thanks for sharing. In my current build process we had difficulty locating valve springs. Cruiser Corps. came through and they are in process. I spoke with my mechanic when he notified me that he could not source the springs and I commented how many "used small block Chevy" springs entries I had seen. But that when I went looking for SBC springs, there are about as many options as there have been engines produced! In your pictures it appears that the red head has dual valve springs. I have seen such listings from Toyota, however, my 1983 FJ60 2F had only single springs. This motor had been previously rebuilt, but not a very complete job, certainly with regards to the camshaft which was still Toyota. Did the later model 2F's come with single valve springs?
 
FJ40Jim said:
Thread dredge.

A 61010 head passed through the shop recently. I have no idea where I got it. A closed chamber head was needed to put an engine together, so I grabbed a greasy closed chamber head off the shelf, sent it to the machine shop. After it was installed, I noticed several things I hadn't paid attention to before.
1. The year date code was 1, so it was a 91 or 2001.
2. it had the full 3F manifold surface, but maybe even bigger than the 3F 61040 heads we got in 86-87.
3. the casting number was 61010.

All together on top of a 4.3L block w/ flattops it runs great.

Pics:
View attachment 859953View attachment 859954View attachment 859955
Click to expand...


Jim, if you are contemplating a rebuild with a '75 2F Engine (Domed Pistons) and a 61030 Open Chamber Head, and you have to bore the cylinders, and domed pistons NLA, what do you do? I assume you go with flat head pistons, but what head do you look for?
 
The easiest thing is to install a set of the TLC Performance forged domed pistons, pins & rings ($1100). Bore the block 1.5mm over for a 4.5L 2F.

Or get new flattop pistons & rings ($500) and a 61040 cyl head ($600) from 81-87 USA 2F.
 
Hi, I own a 1982 (manufactured 10/80) Gen FJ40. My valves where leaking (low compression) so I took head off. It looks like the exhaust valves are too much below surface (see pictures) and I think I would need to replace the valve seats.
My question is if anyone knows the STD diameter of the intake and exhaust seats so I could measure existing ones and determine if I need the O/S (over sized 11136-60030) ones or STD (11135-60010).
For intake seats STD (11131-61010) O/S (11132-61010)
Thanks

20230128_214351.jpg


20230128_214339.jpg


20230128_214320.jpg


20230128_214305.jpg


20230128_214259.jpg
 
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As mentioned above, I'm rebuilding my 61010 NON US head and was wondering if someone embedded new seats in such? I went to the heads shop and they told me that it doesn't have extractable seats although toyota have part numbers for the seats. Any info on that? Also found SBI part numbers that cross reference with toyota part numbers but it seems that OD is too big.

Any insight would be appreciated. Thanks
 
Seats are definitely removable and replace-able. I would be wary of a machine shop that said they weren’t.

Be careful what you wish for though. You could spend a lot of time and $$replacing them only to find your valve position is the same..or worse.

Ive seen it happen.

If you found this information useful, feel free to hit the like button.
 
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