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Hi there, I rebuilt my Aisan carburetor but there's a washer that broke off. I can't find a part number for a replacement. I've attached a screenshot which shows the washer, spring and clip. This was taken from Robert Walker's (forum member, xirdneh) Aisan carburetor teardown video at around 57:40 m...

Hey Petros, Thanks for the additional ideas. I hadn't thought to check the water pump for an internal leak. Externally, it seems fine and I can't see any leaks, even when pressure is applied. But internally, I know there's an o-ring that mates between the pump and the block. So maybe I'll pull the p...

Hi Petros, Thanks for all those good suggestions. Beleive it or not, over the course of troubleshooting and replacing components, I did eventually hit all those points you suggested. A couple of comments... All the hoses were replaced and checked for leaks. Those were all good. The radiator was also...

Thanks, Chris. I'll give that a try with a small hammer. If things don't budge after that, I'll probably just leave it as is, then see where things are at after reassembling, most likely using Petros' head gasket mod.

-Rick

Hey guys, Thanks a lot for the replies and all the great information. It's really helpful. Regarding something Chris wrote: "I don't remember having to drill anything, but there was some grunting with a stiff wire as I recall." Do you mean to suggest that it was pretty tough to get the hol...

Hi Chris, Thanks for the reply and the info on what you did with your 4AC. I'll give it another try using a stiff wire of some kind. The pick tool I was using has a tapered diameter so as it gets deeper in, it's probably getting stopped due to the limits of block's hole diameter. Thanks for the link...

Hello there, New user here; first post. Hopefully this is right forum. I am doing my first head gasket job on my 4AC engine and I'm confused about 3 particular holes in the block. I've uploaded 2 attachments which show the block with and without the head gasket overlaid on the block. In the photo wi...