8 replies to this topic

[lctriples]

G'day forum members, just wondering if anyone can help me solve a bit of a mystery to me if possible please. Picked up a cheap second hand 161 over the weekend, as was chasing a spare LC/LJ Sump. On the rear of the cylinder head there is a "US PAT 5482 000" disc glued on plus stampings which as far as i can read (upside down: "GAS 48178 QC" and possible "5535" stamped over this reading the other way. Casting numbers on passenger side are: "H     7420109    HOLDEN     K145+   8" I cant find anything on googleweb for that patent number and why would it be a us patent number for aussie made engine. Have attached pics. Engine number is 2600H35833. As far as i can tell was not an LPG engine as was running a standard strommy last time was fired up. I presume "GAS" refers to US term for petrol??

Any help would be graetlly appreciated: Paul

Attached Files

•  IMG_3266.JPG   118.26K   1 downloads
•  IMG_3267.JPG   118.68K   1 downloads
•  IMG_3268.JPG   140.68K   2 downloads
•  IMG_3269.JPG   93.54K   1 downloads
•  IMG_3271.JPG   149.43K   2 downloads

Edited by lctriples, 08 November 2022 - 02:27 PM.

[S pack]

7120109 with cast date K145 is a HD Holden 149 High Compression cylinder head cast on the 14th October 1965.

Not the original cyl head for that 2600H engine.

No idea about the US Patent disc but could GAS mean the cyl head has had hardened valve seats installed to run on LPG?

[Indy Orange]

Interesting it has gas stamped on it and the US patent tag.No idea really .Still could have been set up for gas originally.

Lots where used to turn cement mixers in trucks.My replacement 2600s motor I found in a paddock come wrecking yard purchased around 1999 was supposedly used in a forklift .

[RallyRed]

Things like theseUS PAT 5482 000 discs are often engine builder's tell tales, to limit their exposure to warranty claims. They melt? ,change colour/ shape if the engine suffers an overheating issue, and thus voids warranty.

[lctriples]

Thanks guys, appreciate the input. Is the cylinder head worth anything? or is it only of value to someone doing a HD numbers matching resto. When i get time i might rip the head of and check out valve seats ect to see if modified for LPG. Maybe it was used on a LPG forklift!!

[73SUNBURSTEXYOUWON]

Heat Tabs.


https://www.google.c...mobile&ie=UTF-8

[S pack]

Things like theseUS PAT 5482 000 discs are often engine builder's tell tales, to limit their exposure to warranty claims. They melt? ,change colour/ shape if the engine suffers an overheating issue, and thus voids warranty.

Well there ya go, just learnt something new today.

 

In my previous post I typed the head casting number incorrectly, should be 7420109.
 

[claysummers]

Yes they are heat detector plugs. Southcott recnditioned blue motor I got had them siliconed in the welch plugs.


Sent from my SM-G781B using Tapatalk

[lctriples]

Makes sense, thanks guys. Might just keep as a spare engine, you never know when you might need a little red holden six!