My Grandfather, who worked in a Belfast engineering company, taught me that trick 50 years ago, it's great for helping to release and bolt or stud.....

I have been working on cars, for a living years ago, since 1971. This is the first time I have been the "shock the threads" technique to prevent snapping head (or other) bolts. Luckily I have never snapped a head bolt over all these years, and now it is not likely I ever will. I will be sharing this technique with others. It makes so much sense. Many thanks

Thanks I was sweatin head bolts trying to get them loose and I know #1 would have been a disaster if it wasn't for your video so thanks again!

Excellent video. Saved a major headache (2016 Kia Sorento 3.3l)

Thanks guys that was a lot of help. I appreciate you guys posting this.

Wish I'd watched this about an hour and a half ago, darnit.

my man you're a car God!! my grandpa swore to the heavens that he invented that technique

👍👍👍👍 These little tricks make all the difference 👍

Very informative, thank you

Man, that's sick!!! I guess both from the engine perspective which was my first thought... and I guess great method. The exhaust manifold bolts are what get's me nervous. I've got the Dodge Ram 2001 and I'm riggin for now with custom leak clamp'age to seal where a chunk of gasket went by by. Guessing the Toyota engine's aren't such a bad design. The 99 Ford F150 was I've heard a no go for most when I called around asking about advice for the Ram. I need to check under the Ram's valve covers since I wonder what the leak over the years has done with the specs underneath with the ghetto furnace cement and stainless steel zip ties few attempts prior to seal. Anyways, Thanks for sharing!

You guys are the Prius masters!!! Try to find out what type of chocolate the owner is using for engine oil haha! Thanks for all you do. Stay safe out there guys.

Good job guys

Replacing cylinder head studs on an 83 1.9L waterboxer VW. Two started out fine but are really stuck on the last few threads. The bolts are so long I'm really worried about snapping one off and creating a much greater issue. I'm going to try this, send as though it should still be effective.

Very well said

excellent!

I am changing a head gasket on a riding lawn mower engine. I removed all of the bolts on the head except one that just wont come loose. I loosened the bolts in a circular pattern instead of a criss cross pattern. This may have been a mistake. If I "shock the threads" with a hammer on the one bolt that is stuck is there a chance of warping the aluminum heads ? I have seen people heat up the bolt. Will this heat warp the aluminum heads ? Thanks

valuable info right here thanks guys I WILL SUBSCRIBE b/c of this wow

I’m really happy that I came across this video before getting started. What is your torque wrench set to?

Mineral oil in itself is not the problem. The problem is poor oil changing interval and even worse, those Quick Lube shops who perhaps don't even change the oil or the filter or use the cheapest possible oil quality. A quality mineral oil like Castrol should be fine when replacing it regularly. I do use synthetic on my car to extend the oil change intervals. However, the tapping idea is invaluable for stuck bolts situations. Another tip is never work after driving in rain, wet bolts will get real stuck when removing them next time - such as suspension bolts.

Great video, but I didn't see the same thing when I removed my prius head bolts. No matter how many times I banged on the head bolt with hammer, they were stubbornly locked. I had to use breaker bar with large pipe as extention to force them. No sign of "springiness" as shown in the video. Eventually all the bolts came out intact, but they were incredibly difficult to loosen. It took maximum strength I could muster on 1/2 inch breaker bar with pipe extension. The engine was clean without any sludge as only synthetic oil was used on this engine.

Im about to take the head off a 09 corolla motor. This definitely helps

This happens to me on the same type of engine and the same exact bolt location? It is a 2012 Lexus CT200H. What wrong with this type of head bolt? It is the same situation….

What is it with mineral that causes the bolts to seize?

What tool are you using to give you that click sound or is this the bolt making that sound?

Out of curiosity would it be safe to just initially shock them before you attempt to get the first crack? Or could that cause issues if it really didn’t need the shock?

I'm glad I didn't go buy a 12mm impact socket like i planned on doing.

Should the head bolts be replaced once taken off?

God. That's Oil is really bad. I don't expect that kind of sludge even with cheap Pennzoil yellow bottle or GTX castrol. 0w-20 should be fully synthetic

Why did you guys delete your complete Prius head gasket instructional video ?

What about an '07 Prius? Dealer told me conventional oil was OK.

Boii that oil probably wasn't changed for 50,000 miles..

does this method work with women when they WON'T break loose and give ya some? 1-2 taps on the noggin helps me .. rubber mallet ONLY fellas

so sad to see that cheap oil slugging up the engine.

Great trick and very well explained especially. You should monetize your video, tricks of the trade shouldn't come free lol.