I have a 1993 Fuso truck and the coolant keep going into the crankcase and I can't figure out how this is happening, I remove the head cylinder as I thought it was the problem and change the head gasket and it still has that problem...What could be causing this?
Removing the cylinder head and changing the head gasket
Hello and Welcome to justanswer...There's a couple of things here that could / will cause this..You could have a fracture inside the head ..you don't say if you had a pressure test done on the head while it was off - or if the head was skimmed... that is imperative too..So, either the head has an internal fault - or it wasn't skimmed and its warped..or, if this engine has piston liners as if I recall correctly it does, then if all else is ruled out, you will have a liner not sealing / one of the seals gone which will cause water to leak from the water / cooling jacket into the engine.Im very pleased to have helped you - Please click the Accept button for me now - Thank You ... Please note , you need to press the Accept button even if you are a subscriber to justanswer - thank you again. Kind Rgds - MIKE.
It's not the liner seal or the head at all...my mechanics already verified that....the coolant is coming through original holes in the bottom of the block beside the number 1 piston.
Hello again..It really would have been helpful and time saving for all if you had said in your question all that has been done / not done etc.... I can only tell you what is common - I cant see or guess ..What do you mean now by - ... "...the coolant is coming through original holes in the bottom of the block beside the number 1 piston"....?Rgds - MIKE...............................
The hole that the coolant is coming through is beside the number 1 piston and the hole seems to be factory made, not a crack in the block....I hope I explained it clearly.
Hello again... thank you for your reply..Is this on the inside of the crankcase ?Rgds, MIKE...................................
Thank you ..What is the Engine code on this ?I am looking at this to try and find this "hole" for you ...on diagrams..Rgds - MIKE.................................
Engine # XXXXX a heads up, each cylinder has that hole beside it. my Mechanis just informed me
Hi again.. thank you for that that does help..In that case you are looking at oil holes / drain holes from the block if they are large enough...or feed if they are the small ones - they are in that case, "wash" (oil ) / feed oil holes if you understand.. and what you have here if you have water coming out of one of those..you have either an internal fault ...again..with a liner..or its seal..and especially on that cylinder..or a crack in the block there in the water jacket - regardless of what the mech has said before m afraid as to the liners / seals etc being checked and ok..For water to becoming out of one of those holes, that has to be the case Im afraid... Im afraid he is going to have to strip it and pressure test it / inspect it further - there has to be such a fault a I have mentioned for this to be happening....I hope that helps you further - let me know if I can help more.. Im sorry its not good news - but the fault is something there like that for that to be happening....Meantime, please click the Accept for me now, Thank you again...Best Rgds - MIKE.
34 + years of Vehilce Repair - Electronics and Diagnostics
Mike...just recently my mechanis told me that he was advise that th ewater leaking could be coming from the "water pump" is this possible?
Hi again...I dont really see how water would get from the water pump to inside the crankcase to be honest ... Certainly check it out - To be honest I thought all that would have been checked with the engine completely stripped - but ...check anyway - just in case of course...Best Rgds, MIKE.