FJ62 leaded/LRP or unleaded petrol?

[FruitSticks]

Hi

I have a 1988 FJ62. I live in South Africa. I would like to know if my engine can handle 95/97 unleaded petrol. LRP is being phased out and there are rumours going around that I NEED LRP.

I would appreciate an explanation of the answer to help with my research.

Thank you

 

[BlackCat]

Is a South African 62 carbureted? Keep in mind, here in the US we haven’t used leaded fuel for what, over 50 years? All our 60’s/62’s are ok.

 

[FruitSticks]

Is a South African 62 carbureted? Keep in mind, here in the US we haven’t used leaded fuel for what, over 50 years? All our 60’s/62’s are ok.

Yes it is carburetted. Everything I have been reading is from the US. I guess the ones made over there are ok running unleaded. I'm just wondering if the ones made in non-US factories can handle unleaded.

 

[3_puppies]

Yes it is carburetted. Everything I have been reading is from the US. I guess the ones made over there are ok running unleaded. I'm just wondering if the ones made in non-US factories can handle unleaded.

all Landcruisers were made in non US factories,

 

[FruitSticks]

all Landcruisers were made in non US factories,

Ah ok I didn't know that. Thanks. So would mine be made in the same way? I'm guessing they would. My concern is that people keep telling me I need to use lead replacement petrol (LRP) but we are discontinuing it here in SA. Everything I'm reading online, however, says unleaded is fine.

 

[FJ40Jim]

There are poverty spec 2F/3F cylinder heads that don't have hardened seat inserts. SOR was trying to sell them years ago as direct replacements for US spec cyl heads, but for less $$. Don't remember the casting number, but it was higher than our 61040. Maybe 050, 060?
Edit: it was 61070 that had iron seats.

 

[FJ40Jim]

Heads that could be on a Gen Spec FJ62:

11101-61050	W/O(EEC)	1	$1,830.45
11101-61060		1	$1,830.45
11101-61070	LOW OCTANE SPEC	1	$1,743.25

And here's the listing for hardened seat insert:

11131-61010	STD, STD, HIGH-OCTANE SPEC	6	$37.52
11132-61010	O/S 0.03, O/S 0.03, HIGH-OCTANE SPEC	6	$36.14

It indicates the hardened seats are not used in the low compression head (61070).
Hi-compression heads (61060, possibly 61050) do have the hardened seats for unleaded gas.

Empirically, what was found in the 1970s-80s when tetraethyl lead was phased out in the USA gasoline, was engines that had been in service for some time did not suffer immediate valve seat failure. The heat & hammering going on at the cast valve seat acted to harden the valve seat over time.

 

[FruitSticks]

Heads that could be on a Gen Spec FJ62:

11101-61050	W/O(EEC)	1	$1,830.45
11101-61060		1	$1,830.45
11101-61070	LOW OCTANE SPEC	1	$1,743.25

And here's the listing for hardened seat insert:

11131-61010	STD, STD, HIGH-OCTANE SPEC	6	$37.52
11132-61010	O/S 0.03, O/S 0.03, HIGH-OCTANE SPEC	6	$36.14

It indicates the hardened seats are not used in the low compression head (61070).
Hi-compression heads (61060, possibly 61050) do have the hardened seats for unleaded gas.

Empirically, what was found in the 1970s-80s when tetraethyl lead was phased out in the USA gasoline, was engines that had been in service for some time did not suffer immediate valve seat failure. The heat & hammering going on at the cast valve seat acted to harden the valve seat over time.

This is very helpful. Thank you. How do I find out which head I have?

 

[3_puppies]

This is very helpful. Thank you. How do I find out which head I have?

it will be raised cast #'s on top of head along the intake/exhaust side of the head between head bolts by #2 or #3? cylinder

 

[FruitSticks]

it will be raised cast #'s on top of head along the intake/exhaust side of the head between head bolts by #2 or #3? cylinder

Hi

So after doing some research I found that my vehicle model is FJ62RG-MN. I found that I have either the 61050 or 61060 Cylinder head for Toyota Land Cruiser FJ62RG - Auto parts

I see that the seats are 11131/2-61010

Cylinder head for Toyota Land Cruiser FJ62RG - Genuine parts

Cylinder head for Toyota Land Cruiser with FJ62RG

toyota-general.epc-data.com

So my conclusion is that I can run unleaded. Is this accurate?

Thanks

 

[FruitSticks]

it will be raised cast #'s on top of head along the intake/exhaust side of the head between head bolts by #2 or #3? cylinder

Hi

So after doing some research I found that my vehicle model is FJ62RG-MN. I found that I have either the 61050 or 61060 Cylinder head for Toyota Land Cruiser FJ62RG - Auto parts

I see that the seats are 11131/2-61010

Cylinder head for Toyota Land Cruiser FJ62RG - Genuine parts

Cylinder head for Toyota Land Cruiser with FJ62RG

toyota-general.epc-data.com

So my conclusion is that I can run unleaded. Is this accurate?

Thanks

 

[FJ40Jim]

Read the casting # on the head and then know for sure.

 

[FruitSticks]

Read the casting # on the head and then know for sure.

Will do. Thanks

 

[RuanVorster]

Will do. Thanks

Did you ever get to the bottom of this? Doing similar research here in the old RSA.

 

[Bryan062087]

Heads that could be on a Gen Spec FJ62:

11101-61050	W/O(EEC)	1	$1,830.45
11101-61060		1	$1,830.45
11101-61070	LOW OCTANE SPEC	1	$1,743.25

And here's the listing for hardened seat insert:

11131-61010	STD, STD, HIGH-OCTANE SPEC	6	$37.52
11132-61010	O/S 0.03, O/S 0.03, HIGH-OCTANE SPEC	6	$36.14

It indicates the hardened seats are not used in the low compression head (61070).
Hi-compression heads (61060, possibly 61050) do have the hardened seats for unleaded gas.

Empirically, what was found in the 1970s-80s when tetraethyl lead was phased out in the USA gasoline, was engines that had been in service for some time did not suffer immediate valve seat failure. The heat & hammering going on at the cast valve seat acted to harden the valve seat over time.

Does anyone know the specific differences between the 61060 cylinder head and the 61050?

I was about to purchase a NOS 3F cylinder head with 11101-61060 on the containing box, but I just learned the head itself is engraved with 61050.
Are they both high compression heads with hardened seats? What are the differences between the heads?

One is noted to have no emissions control (61050). It seems they may call for different part numbers for the intake/exhaust valves as well.

Furthermore, what are the differences in the valves themselves (standard vs. w/o emissions)-- see screenshot below.? w/o emissions are significantly cheaper. Is there a benefit to the higher cost valves?