Guest weeble Posted February 10, 2008 Share Posted February 10, 2008 Just fitted a 300 tdi to the trayback and taken it for its first long test drive this morning to find something a little "strange". After approx 10 miles i noticed a LOT of smoke coming out of the exhaust but on investigation realised it was steam. So Im thinking to myself head gasket or possably a cracked head. Strangly when the pressure cap was removed all the steaming stops and it drives OK but again when replaced exactly the same thingh happened although there was no excessive pressure and it dosent seem to be using excessive amounts of water. So is it likely to be just the head gasket or do you think the head is cracked before i start ripping it to pieces. Any advice greatly appreciated Quote Link to comment Share on other sites More sharing options...
Les Henson Posted February 10, 2008 Share Posted February 10, 2008 It sounds as if the water is getting sucked in if the system isn't over-pressurising as cylinder compression is a lot higher than the water pressure when it's up to running temperature. I've just rebuilt one of these engines and I can't think of anywhere else that water can get sucked into the engine apart from the inlet side of the head (but then the head gasket might be doing something wierd ) If it was me, I'd take the head off and get it crack tested, but I'm not 100% sure that this is your problem. 10-miles indicates the cooling system is up to temperature, so the pressure from this may push the coolant out of the gasket/head, which then comes out of your exhaust. Have you thought about using ceramic motor seal? I used it once on a V8 and it worked - it's supposed to repair cracks in heads/liners. Les. Quote Link to comment Share on other sites More sharing options...
Guest weeble Posted February 10, 2008 Share Posted February 10, 2008 Thinking on from your post Les it makes sense that it could be finding its way in to the exhaust side as the system is not excessivly pressurising. Do you have any experiance of these heads cracking?. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted February 10, 2008 Share Posted February 10, 2008 Well yes unfortunately The 300TDi engine that I bought had a crack and it was warped beyond reasonable repair too, so it went in the bin. I was given a supposedly good 2nd hand head off an engine that had a damaged crank and that was cracked too! I bought a brand new complete head from Turner Engineering in the end - I got fed-up with paying to have heads tested that then went straight in the bin. Les. Quote Link to comment Share on other sites More sharing options...
Guest weeble Posted February 10, 2008 Share Posted February 10, 2008 Right then I think i will remove the manifolds and pressurise the system to see if I can see any water in the ports. Then it looks like the head is coming off. Quote Link to comment Share on other sites More sharing options...
western Posted February 10, 2008 Share Posted February 10, 2008 You could drop it into Devon4x4 & ask Simon & the boys to do a full cooling system pressure test, they should be able to tell you the exact fault. Quote Link to comment Share on other sites More sharing options...
Guest weeble Posted February 10, 2008 Share Posted February 10, 2008 No need Ralph, Just taken off the manifolds and pressurised the system to find water RUNNING out of No 2 exhaust port so looks fairly terminal. Going to remove the head next to see if i can see anything else. Quote Link to comment Share on other sites More sharing options...
western Posted February 10, 2008 Share Posted February 10, 2008 well least you know whats gone wrong, could be a internal crack from water jacket to valve ports at the worst. Quote Link to comment Share on other sites More sharing options...
Guest weeble Posted February 10, 2008 Share Posted February 10, 2008 Taken the head off today and thats what it seems to be so looks like im on the hunt for a new head!!. Any ideas?. Quote Link to comment Share on other sites More sharing options...
western Posted February 10, 2008 Share Posted February 10, 2008 Turners most likely your best bet, Les H had to get one recently for his engine. Quote Link to comment Share on other sites More sharing options...
Guest WALFY Posted February 10, 2008 Share Posted February 10, 2008 If you don't get it sorted do I get the weekend off of the first 4x4 Adv weekend then? Quote Link to comment Share on other sites More sharing options...
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