Blown head gasket = cracked block?
Just wondering how likely it is that a block is damaged when a head gasket blows or the head cracks? Does the deck need to be machined?
It depends on how hot the engine got,and how long it was running for in the overheated condition.Or if it is just blown because of a faulty head gasket or loose head bolts it usually means nothing else will really need doing.Just a clean up and a new gasket.They will need checking for warpage (block and heads)with a straight edge once the heads are removed in any case.
Last edited by Brett_jjj; 22-01-2010 at 09:23 PM.
Fair enough, makes sense. In the spirit of trying to avoid having it crack tested, is there anywhere particular i should look for cracks in the block?
You can check over the block,but there is no real way (at home) to check for tiny or hidden cracks (like in water jackets etc), some places use magnetic powder,some use a special dye,some use ultrasonics and some even use x-ray to find cracks.Id phone around and get it professionally tested at the cheapest place.
Last edited by Brett_jjj; 23-01-2010 at 12:28 PM.
Got it tested, not cracked. Decks need machining though.
Donating Member
There is an old way of checking for fine cracks in the block - it involves cleaning the surfaces with kerosene then wiping dry.....wait 5 mins then dust with talcum powder. The powder will stick to residual kerosene trapped in any cracks. Same deal for heads.
Has anyone else used CarGo Metallic Seal Up? About to use it on my VS for blown head gasket and not sure how long I should leave it in before flushing and replacing coolant. Says leave for an hour or until leak is fixed, not sure how I will know this without leaving it for a week and seeing how much water is lost.
why dont you fix it properly and change the head gaskets??Originally Posted by Dyjoab
You might find it more usefull to start your own thread to, you will get more responses.
i think using that seal up is just like sticking a band aid on your motor
might be fine to use to get you home from somewhere
but in the long run it will fail again later on and probably clog up a lot of things in your engine
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