herman de boer Posted August 26, 2022 Share Posted August 26, 2022 Dear people I have an problem I turned the bolts on the engine head very tight But one bolt I couldn't because there wash to much corrosion inside How can I solve this Herman Link to comment Share on other sites More sharing options...
Rusty_OToole Posted August 26, 2022 Share Posted August 26, 2022 Does the corrosion affect the bolt threads or the threads in the block? If the bolt, a new bolt will fix it. If the block you may need to install a threaded insert or Helicoil. Unless you mean the bolt hole was full of corrosion? In that case you need to clean it out and clean the threads with a thread chaser. 2 Link to comment Share on other sites More sharing options...
herman de boer Posted August 26, 2022 Author Share Posted August 26, 2022 37 minutes ago, Rusty_OToole said: Does the corrosion affect the bolt threads or the threads in the block? If the bolt, a new bolt will fix it. If the block you may need to install a threaded insert or Helicoil. Unless you mean the bolt hole was full of corrosion? In that case you need to clean it out and clean the threads with a thread chaser. Thanks for the update I will try first a longer bolt and clean the thread Herman Link to comment Share on other sites More sharing options...
Terry Bond Posted August 26, 2022 Share Posted August 26, 2022 Be careful. Bolt length is often critical. There may be a water passage under the bolt hole. Too long a bolt may crack that causing a serious leak. Check bolt length and depth of the hole first. If the bolt you are using is too long perhaps you have mixed them up and used the correct bolt in another location. I have seen different lengths used depending on the vehicle. Terry 1 Link to comment Share on other sites More sharing options...
herman de boer Posted August 26, 2022 Author Share Posted August 26, 2022 3 hours ago, herman de boer said: Thanks for the update I will try first a longer bolt and clean the thread Herman 1 hour ago, Terry Bond said: Be careful. Bolt length is often critical. There may be a water passage under the bolt hole. Too long a bolt may crack that causing a serious leak. Check bolt length and depth of the hole first. If the bolt you are using is too long perhaps you have mixed them up and used the correct bolt in another location. I have seen different lengths used depending on the vehicle. Terry Yes I understand that I will clean the hole with a thread chaser and with a little bit longer bolt It's very strange to me that there is a cooling liquid under the bolts in the engine block I thought that's not normal anymore this days in the cars I don't know what kind of coolant they used in that day's Herman Link to comment Share on other sites More sharing options...
Larry Schramm Posted August 26, 2022 Share Posted August 26, 2022 An air compressor is a very helpful tool to clean out the debris from the bolt hole. Link to comment Share on other sites More sharing options...
JACK M Posted August 26, 2022 Share Posted August 26, 2022 Not uncommon that some bolt holes are open to the water jackets. Be sure and use a good sealer. 1 Link to comment Share on other sites More sharing options...
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