suggs Posted April 22, 2011 Share Posted April 22, 2011 Hey all got some serious issues with the wifes D2 V8, tuesday night she over heats and wife pulls over and AA recovers, get home and i top up coolant which was almost completely empty and notice the gaskets gone on the throttle housing and waters spurting out so i think thats all it is. next day i decide to divert throttle housing to get rid of the gasket problem forgood as second time in 2yrs its gone and think car will be fine. then drive car about 2 miles and boils straight up again and i find big hole in rad, fit brand new rad and state then drive 2 miles and boils up yet again!!, have checked water pump and seems ok as water is getting around the system rad cap ok etc. Cars at a local specialist garage and next week there going to re check the obvious thing and if nothing wrong heads are coming off to check gasket and if thats ok then its sounding like the block cars a yr 2000 model 4ltr thor engine with 60k on the clock, its not been loosing any water and not miss firing and no smoking so in other words no other sign of head gasket or block symptoms, other then the boiling up its running 100 percent perfect, engine clearly seems to be pressurizing and boiling up rather than loosing and water then boiling up.. any views on this? Quote Link to comment Share on other sites More sharing options...
Escape Posted April 22, 2011 Share Posted April 22, 2011 If you only drove it for 2 miles, it could just be an airlock. Bleed, refill and try again. Quote Link to comment Share on other sites More sharing options...
suggs Posted April 22, 2011 Author Share Posted April 22, 2011 If you only drove it for 2 miles, it could just be an airlock. Bleed, refill and try again. yeah thats been done a few times but still cooking its self.. Quote Link to comment Share on other sites More sharing options...
sharpy1980 Posted April 22, 2011 Share Posted April 22, 2011 have you got the correct cap on the header tank? as the water will boil if the cap isn't letting the system get to the correct pressure. Quote Link to comment Share on other sites More sharing options...
suggs Posted April 22, 2011 Author Share Posted April 22, 2011 have you got the correct cap on the header tank? as the water will boil if the cap isn't letting the system get to the correct pressure. yes been double checked, had water pump off and that seemed ok and water is circulating but could be the impeller seizing under load and when hot (finger crossed) other wise its looking more serious. weird though as no miss fire, no coolant lose heater works fine no oil in water etc just fine one day then boiled the next, cars never had a problem before other than normal service parts.. i think its pressurizing due to sucking in air some were and thats what blew the throttle housing gasket (weakest link) then bi passed that so then blew a hole in the rad (next weakest link)... gonna be into 3k plus if its a new block, dont no if it would be worth spending that on a 10yr old Disco Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 22, 2011 Share Posted April 22, 2011 Your engine can't suck in air and then boil over (a bit like two negatives). A cooked engine will either blow the head gasket straight away, or in the near future. Air trap will cause the engine to overheat, as it restricts circulation. From cold - start the engine with the rad cap off - if water is pushed out dramatically, then either air trap or head gasket/s Les. Quote Link to comment Share on other sites More sharing options...
monkeyb0y Posted April 23, 2011 Share Posted April 23, 2011 Sounds bad to me....it shouldn't just start playing up without a problem.. I would suspect the hg .... It's similar symptoms of an airlock but how would it get one initially...or loose coolant... Quote Link to comment Share on other sites More sharing options...
scatt Posted April 23, 2011 Share Posted April 23, 2011 Have you checked the small plastic pipe that goes from the top of the rad to the header tank?? I had a over heating issue once and the pipe was blocked up! i also checked were it went into the header tank and that was blocked too!. I dont think it will be the cure your looking for but might be worth a look. Quote Link to comment Share on other sites More sharing options...
suggs Posted April 23, 2011 Author Share Posted April 23, 2011 thanks ill check the pipes etc, to be honest if its the HG ill be quite relived as thats a lot cheaper than a new block. whats worrying is it had no build up to this problem as you would expect with a HG going, just boiled up with no warning. fingers crossed, should no early next week.. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 23, 2011 Share Posted April 23, 2011 Why would you spend £3k on a new block when you can buy a whole car with running V8 for less than that? Quote Link to comment Share on other sites More sharing options...
suggs Posted April 23, 2011 Author Share Posted April 23, 2011 Why would you spend £3k on a new block when you can buy a whole car with running V8 for less than that? never said i was going too, but then again mines only got 60k on the clock had it for several years and has no other issues, pretty much mint condition ES premium in metallic Bronze Orange with lightstone piped leather will then have a brand new engine with warranty and will only owe me about 3k. or could spend 3k on another one with more millage and loads of problems i dont no about and the engine could do the same at any moment Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 23, 2011 Share Posted April 23, 2011 A sudden random overheating/coolant loss doesn't seem like the popular liner slip thing, although if a leaky coolant system has had you running with no coolant then it could well have knackered the block or several other things. Random stuff off the top of my head;- hoses can have collapsed, got leaks, or become blocked, the stat can have died (since the thing's boiled I believe it's good practice to replace the stat - fit genuine), you can have done one or both HG's, split the coolant tank, have a dead water pump or maybe a failed engine fan. Quote Link to comment Share on other sites More sharing options...
suggs Posted April 23, 2011 Author Share Posted April 23, 2011 yeah thanks to be honest most if not all the basic stuff has now been checked and ruled out, other than going over all of the basics again just to double check which will be done next week then the next step is heads off for a look at the gaskets.. cant moan really as its the wifes car, and ive spent way more cash on my 90 Quote Link to comment Share on other sites More sharing options...
pegasus Posted April 26, 2011 Share Posted April 26, 2011 After it has been run and stood over night pull the plugs out to see if any have gone rusty. If they are numbers 1,2,7,8 could be head gasket or cracked block / slipped liner. If either numbers 3,4,5,6 are rusty its definately the cracked block / slipped liner, as there is no water running around the heads on these cylinders. I had a 4.6 range rover and it just went with no warning, same as yours travel 2 miles and it boiled. I got through 2 engines with this. Good luck Mark Quote Link to comment Share on other sites More sharing options...
suggs Posted April 27, 2011 Author Share Posted April 27, 2011 Might have got lucky here, garage thinks the problem is the new thermostat they fitted. top hose gets red hot, bottom hose is stone cold as is the rad. they have ruled out the water pump or airlock and have said there convinced its not the gasket or block. will know tomorrow when new stat arrives. Fingers crossed Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 28, 2011 Share Posted April 28, 2011 So was the new stat genuine? Quote Link to comment Share on other sites More sharing options...
nicksmelly Posted April 28, 2011 Share Posted April 28, 2011 I still go with air lock, probably at the back of the inlet manifold. Top hose is getting hot as the water in the heads is turning to steam, pressurising the system and the header tank pukes. Quote Link to comment Share on other sites More sharing options...
suggs Posted April 28, 2011 Author Share Posted April 28, 2011 its confirmed, was a duff (new) thermostat im picking car up tomorrow. not sure if it was a genuine one or not but was £18 so could be a clue in the price... better than a new Engine Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.