PDowdy Posted October 24, 2010 Share Posted October 24, 2010 Hi guys - I'm in serious need of some advice, all help greatly appreciated. Let me give you the full history. About 3 months ago my radiator blew in my 95 j-spec TT auto. Never got to the bottom of why but replaced with a new alloy one and relocated into a dedicated oil cooler. Never had any more heat problems before or after - but when it blew the engine temp was off the scale for about 5-10mins (was stuck on motorway when it happened). 3 months on and a slow drip leak from the oil filter meant I was changed the oil last weekend. Couldn't get the filter off originally and needed it to be running, so just changed the oil n left the old filter. 3 days later and big vibrations at idle on way home from work, next morning wouldn't start. Checked and big pool of oil under the car. Replaced the filter, cleaned all the oil and chucked some new oil in... left overnight and no sign of any more leaks. Today got mate to do a compression test. Took coil packs n sparks out and found the 6th cylinder (nearest to driver) full of water. Drained the radiator and did the compression test. Results below... also appears to now be a trace of water in the oil. Now we (rather my mate as he's the mechanic!) think its the head gasket. I'm open to other possibilities, has anyone seen anything like this before or had a similar experience ?? Cylinder Dry Wet 1 150 170 2 150 161 3 147 163 4 150 161 5 142 161 6 Didn't try as still had some water in (the compression meter isn't calibrated so figures may be a little off) Any ideas ?? Quote Link to comment Share on other sites More sharing options...
bignum Posted October 24, 2010 Share Posted October 24, 2010 Unfortunatley it does sound like head gasket, so was it oil or water in 6, title says oil.was the water around the spark plug before you actually removed it or down in the cylinder? Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 24, 2010 Share Posted October 24, 2010 ive had a similar problem on a st205 a couple years ago.i did a compression test & 2 cylinders was down. I removed the head & found a little evidence of water in one bore, renewed the head gasket then was fine,so i would suggest head gasket Quote Link to comment Share on other sites More sharing options...
PDowdy Posted October 24, 2010 Author Share Posted October 24, 2010 Yeah sorry - was water I found in the cylinder.. appeared after the spark plug was removed. Drained most of it out and what little was left was spat out is it turned over. Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 24, 2010 Share Posted October 24, 2010 hi guys, (it was me who did the compression test) i dont know much about these engines - is cyl no.6 a common one for the head gasket to go on? and are we likely to be looking at anything else cracked block,,,, head etc:( and what about the fact we have water in the oil aswell is this common??? likley to have happened at the same time?? just weighing up options at the moment any pointers appreciated:cool: Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 24, 2010 Share Posted October 24, 2010 ive seen it quite a few times in other cars, to be honest i thought it was quite common being water and oil channels pass through the gasket, just depends on where the gasket fails i suppose Quote Link to comment Share on other sites More sharing options...
Terminator Posted October 24, 2010 Share Posted October 24, 2010 Given the motor way high temperature incident, I would advise you get the head checked, as it may be warped. The MKIV is not known for blowing head gaskets,so it may be more than just a breached gasket, I hope I am wrong. Quote Link to comment Share on other sites More sharing options...
supra dan Posted October 25, 2010 Share Posted October 25, 2010 sounds like what happened to mine i thought head gasket turned out to be a cracked block Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 25, 2010 Share Posted October 25, 2010 cracked block:taped: before we split it wonder if its worth doing any more tests - leak test??? but would it show us anything??? cheers:) Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 25, 2010 Share Posted October 25, 2010 ive only done leak down test when i suspect the rings,personally i would of had the head off by now, with any luck you might be able to see where /if the gasket has gone,sometimes not so easy to see if the bore is cracked Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 25, 2010 Share Posted October 25, 2010 have you compression tested no 6 piston yet? Quote Link to comment Share on other sites More sharing options...
PDowdy Posted October 25, 2010 Author Share Posted October 25, 2010 yeah we did but it was still spitting a bit of water... not sure if that screwed the test but it showed 235!!! Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 25, 2010 Share Posted October 25, 2010 your not too far away from chris wilson, i would take the car to him to have it tested. Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 25, 2010 Share Posted October 25, 2010 your not too far away from chris wilson, i would take the car to him to have it tested. what test would he be able to do ? Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 25, 2010 Share Posted October 25, 2010 yeah we did but it was still spitting a bit of water... not sure if that screwed the test but it showed 235!!! Yes it may well of done its gone up quite high,with a crack or blown gasket it usually goes down. If you can get it to a garage they may be able to do a more conclusive test,but either way its off with the head, Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 25, 2010 Share Posted October 25, 2010 what test would he be able to do ? Hes a Supra specialist, simple. Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 25, 2010 Share Posted October 25, 2010 we're pritty certain we have a f:taped:k'd engine no. 6 cyl was full of water - its just deciding if its worth paying somone to strip it then finding out it needs a block and a head and it'd have been cheeper just to drop a new engine in and rebuild this one at our lesure when we have the luxury of time to find parts at reasonable prices:) if it was gonna be a definate headgasket then we could just go down that road but these 2 posts The MKIV is not known for blowing head gaskets,so it may be more than just a breached gasket sounds like what happened to mine i thought head gasket turned out to be a cracked block makes me think were in for more than just a h/g:( problem is the car is a daily driver and we could do with it back up and running out of interest anyone know the book hours for getting the head off ? cheers for the help so far:) Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 25, 2010 Share Posted October 25, 2010 you got nothing to lose taking it to a garage, get a leak down test done which can pinpoint whats wrong Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 25, 2010 Share Posted October 25, 2010 you got nothing to lose taking it to a garageonly £££ just thinking tho a leakback test will only show that weve got a break into the waterway - it wont show us it its via the block or the h/g will it??? Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 25, 2010 Share Posted October 25, 2010 Hes a Supra specialist, simple. what he said. and he can do any number of professional engine tests Quote Link to comment Share on other sites More sharing options...
comorin219 Posted October 25, 2010 Share Posted October 25, 2010 if you are expecting the worst & thinking of replacing the engine why dont you just take the head off, im sure if you got that much water in the bore its going to be pretty evident what the cause is Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted October 25, 2010 Share Posted October 25, 2010 if you are expecting the worst & thinking of replacing the engine why dont you just take the head off, im sure if you got that much water in the bore its going to be pretty evident what the cause isi think thats the best thing to do:) - we havent had time to get at it so far this week thats all:( Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted November 27, 2010 Share Posted November 27, 2010 eventually got round to getting the head off today! block looks ok but the h/g has a crack in it and it looks like it had delaminated- it's so fine you wouldnt have thought that it would have caused so much water to get in there but as theres no other evident damage it must be that has anyone had a similar experiance with a cracked h/g delaminating like this ?? all in all a good result tho Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 27, 2010 Share Posted November 27, 2010 If you have seriously overheated the engine the head will be scrap. Get it checked with a straight edge first or get it to an engineering company to run a clock along the face. If its warped which it probably will be then you'll need another head, you could machine it flat but the cam journals will still be out of line. Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted November 27, 2010 Share Posted November 27, 2010 just searching for the measurment of the allowable tolerance on the head before it needs a regrind - do you know what it is? Quote Link to comment Share on other sites More sharing options...
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