61040 Head - Two Variants?

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D

dunnyboy

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Apr 12, 2012
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Just got ready to install a rebuilt head purchased from SOR and noticed the casting around the manifold surface is slightly different from my old head. The differences are all related to additional bolt holes (all appear to be blind) or areas where the casting has been beefed up to allow the holes to be bored in the first place. These are not aftermarket changes as the casting itself is slightly modified. All the standard holes are the same on both heads, and the standard SOR manifold gasket fits this head just as it should, other than a few of the added holes are not covered. To reiterate, both heads are 61040 castings shown on the head surface, and the exhaust and intake ports are identical, as are the valves, chamber, and top surface ports for oil and water jacket, bolt holes and rocker assembly. Never heard of a 61040 variant before, and want to make sure about this before I do the installation. SOR is closed or I'd already have an answer. Will post some pics as soon as I can.
Any light that you can shed on this subject would be appreciated. Thanks.
 
Here are the two heads - manifold side up - sitting side-by-side.

20120428_162835.jpg
 
As I understand it the head you have with the extra holes is a later head that also works on the carb'd 3F motors sold in other countries. Check and make sure the valve seats are hardened. There were a few heads like that floating around that had soft valve seats for markets where leaded gas was still available.

:cheers:
Nick
 
The head on the bottom in the picture is a 3F head not a 2F head.

Dyno
 
Based on the information in the below thread, it appears that this 61040 head with the extra holes was used on 85 and later F2 engines, as well as the foreign market 3F carbed engines. I believe Toyota the same head on both applications although the manifold requiring the additional fasteners was only used on the the 3F engine. At least that is my read on the posts in this thread.

https://forum.ih8mud.com/60-series-wagons/143089-3fe-vs-2-3f-carb-cyl-head.html
 
It's a 2F/3F head, used on 5/85 to end
 
So, I'm assuming from the information posted that, although the manifold face is different than my earlier 61040 head, this 2F/3F variety is safe to use on my block and the standard 2F manifold gasket is okay as well, correct?
 
The Head Gasket you need is the 11115-61030 one.
 
The dealer said the correct gasket was a 11115-61010 for all the 61040 head castings. that is the one that i bought and installed today. Is that really a problem?
 
So it appaers from jim's response I should be good to go with the 61010, as the differences are negligible. I think from what i can see on line that maybe one water jacket opening in the HG is different but all else appears the same. Could not be signifcantly different as the HG casting of the head face looks identical. Must just be changing the water flow, at least theoretically.
 
I just looked at both, since I have them on the shelf, and I can't see ANY difference. None. So they probably are being super'd by the 61030 design, and since yours is new from the dealer ... It's already in, anyway, so you gotta run it!
 
For future reference, the 61010 OEM headgasket does function perfectly well with the 85-87 cylinder head for which the 61030 headgasket is spec. I just installed an 85 version (F2/F3)rebuilt head on my 1982 FJ60 block and it runs cool with the 61010 underneath. Spot checking the head temps with my infrared gun, the temp variances from to back are negligible, varying only 4 to 6 degrees F. May not be as efficient as the 61030 in water distribution, but it works really well just the same.
 
For future reference, all 2F block decks are essentially the same. The head gasket design variations are to support changes in the head casting. The head gasket and cylinder head should always match.

The dealer sold you a 61010 because they can only look up the HG by the truck. Since your truck is an 82, they could only see the 82 HG. They should have gotten the 85-later HG. Just sayin....

BTW, what is the date code on the new head? It's in the string of characters along the top of the head. Something like 7 61040 D 23
 
I would like to further clarify on the 61010 application, as I don't want my prior post to be misconstrued. First, let me say that i agree with Jim's comments completely. I am not in any way recommending that the 61010 gasket is the proper application for the 1985 -87 later variant 61040 cylinder head. Had i known of the change to the 61030 gasket prior to installation, I would have absolutely purchased the 61030 and installed it. In my case, I found out of the gasket change after installing the 61010. I just wanted to share the information regarding performance with this particular combination of Head and HG. The head shows virtually no temperature variance from front to back under the circumstances i have continued to monitor and record. I have checked the head at the point of thermostat opening, 10 minutes of idle, immediately after long distance highway driving, both at idle, and 10 minutes after shutdown. The temp variances in spot checking the head in all cases are about nil. Again, this information is intended for other members who may stumble into the same situation in the future. You should be okay. BTW talked to someone at SOR about this application and the rep said he was aware of several of these same type applications and no problems have been encountered to their knowledge. So don't feel too bad if you end up doing what I did.
 
:poof::poof:

DANGER, WILL ROBINSON !!

If you drive your truck with that gasket, this will happen:



IKIDIKID

:D
 
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