I have the same kit and had the same result with the adapter for our 2000 GMC pickup. The problem lies in the rubber seals. They are too thin and by the time they are compressed you run out of threads. I had a similar issue years ago with a metal adapter for SAAB cooling systems. The brake master cylinder reservoir was the same thread as the coolant reservoir. I added a second rubber seal from an old brake fluid reservoir cap and the problem was solved. We used the cooling system pump to pressure bleed the brakes and hydraulic clutches on SAABs in addition to testing the cooling system. I decided to keep the kit as it is only $35. I just need to find a flat rubber seal to add to the adapter cap.
@WhiteKnightCutlass glad yours worked. If my gm and ford caps worked I wouldn't even worry about the others but that's just for what I need. I hope you keep having good luck with yours. Thanks for watching and commenting, glad you enjoyed the video.
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I have the same kit and had the same result with the adapter for our 2000 GMC pickup. The problem lies in the rubber seals. They are too thin and by the time they are compressed you run out of threads. I had a similar issue years ago with a metal adapter for SAAB cooling systems. The brake master cylinder reservoir was the same thread as the coolant reservoir. I added a second rubber seal from an old brake fluid reservoir cap and the problem was solved. We used the cooling system pump to pressure bleed the brakes and hydraulic clutches on SAABs in addition to testing the cooling system. I decided to keep the kit as it is only $35. I just need to find a flat rubber seal to add to the adapter cap.
@mlieser1230 Thanks for that info. I think I'll look around for a different seal before I send it back. Thanks again for watching and commenting.
I got the exact same kit, have inly used it twice, once on a ford and once on a gm it worked on both, but now im worried about the other caps
@WhiteKnightCutlass glad yours worked. If my gm and ford caps worked I wouldn't even worry about the others but that's just for what I need. I hope you keep having good luck with yours. Thanks for watching and commenting, glad you enjoyed the video.