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Thread: Crossflo gas in coolant

  1. #1
    Tyre Kicker

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    Crossflo gas in coolant

    Good morning I have a Crossflow 1600 with water pressure after running for 10 minutes it pressurises the water and it blows the water out it's running dellorto twin 40s aldon igntion and 1300 pistons I have used the engine in my escort for the last 3 years and have seen a steady increase in coolant pressure I put it down to the head gasket so after a car rebuild and new rings in the engine and a head check it is now blowing the water out after 10 minute' it gets really hot and when you stop it It seems to put bubble's in the water also to add to the problem s it misfires when hot fine when cold this may be a separate problem or linked
    I have closely looked at the head gasket each time and can not see any carbon traces to water and checked block and head for flatness but not had it machine checked but the head gasket never shows any leaking across to water
    So looks like im looking for a crack somewhere any one seen common places Crossflow crack it must be small as it only happens when hot and no water enters the oil also I've not seen any water in the pistons any tips to spotting cracks within the castings any help appreciated thanks
    Last edited by carlos77744; 22-04-2018 at 10:42.

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    Racer Decade Plus User

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    Re: Crossflo gas in coolant

    Well if its definitely not the HG - although without a guaranteed flat machined head / block face its still debatable, then the next usual place is cracked head or cracked block - both not easy fixes if at all!

  3. #3
    Spanner Monkey

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    Re: Crossflo gas in coolant

    Hi i had exactly same prob in a 1700 xflow was set up perfectly run great but overheated when it was stripped down for rebuild they found water in sump there was a very fine crack in number one cylinder that was the culpret! Interestingly when on rolling rd tuner found number 1 cylinder running colder shown up by infra red temperature scaner on exhaust manifold and was thought to be sticking valve or wrong adjustment.my guess is you have crack in block some where m8

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    Crossflo gas in coolant

    Quote Originally Posted by Painter an View Post
    Hi i had exactly same prob in a 1700 xflow was set up perfectly run great but overheated when it was stripped down for rebuild they found water in sump there was a very fine crack in number one cylinder that was the culpret! Interestingly when on rolling rd tuner found number 1 cylinder running colder shown up by infra red temperature scaner on exhaust manifold and was thought to be sticking valve or wrong adjustment.my guess is you have crack in block some where m8
    Cheers lads double checked the head and no gaps on the feeler gauges I have ordered a crack detection kit to check the head .

    Sent from my SM-G900F using Tapatalk

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