![]() Not sure if this is likely or even possible, just an idea.In the original diagnostic we found no smoke or steam from the exhaust, no pressurisation in the coolant system and it was not losing water. The previous owner might have tried using head gasket leak sealant or something, or maybe just the mayonnaise gunk partially sealed it enough to run ok for a while once it was hot. resulted in overheating that warped the cylinder head and blew the head gasket. Have you checked the compressions? I know it was running ok before but is it possible the water leaks, recent need for water pump etc. Starting to think you may be right about the compression I will try and get a tester to try it. I am wondering if that is just because as far as I am aware Cats get very hot? so if it's missing it must be pumping fuel air mixture out into the exhaust.Īnyway, Someone bringing a proper diagnostic to plug in tomorrow so I will see what it says. One thing I noticed today when it got up to temp was about 1.5-2k rpm, there was a kind of 'phut phut' noise from the exhaust that sounded almost like the unburnt fuel was igniting in the manifold. Two mechanics I know have listened to it run, and both have said it sounds like it's firing perfectly on 3 cylinders, so don't think it is timing. I did manage to get it to drive round the block a couple of times in the hope it would clear up but it didn't. After I did that today, there was a definite improvement in the running, it would ALMOST idle, but still died under 900 rpm. along with all the hoses for cam cover breather and air intake. If there is a way I could have missed something using that technique, please let me know.Īlso, I have now put new plugs in as well as the coil pack, and today I stripped down the throttle body and cleaned it out. I have also tried running without the cam sensor plugged in and it made no difference at all to the running of the engine. I made a template from the diagram in the haynes manual to hold it in the right place, and it all looked exactly like it did in the book. The replacement has come from Vauxhall and is identical to the original. The phase disc is new, when reassembling I stupidly put it on backwards and started to do up the bolt, which bent it slightly flat (they seem to be made of cheese). I have gone back and rechecked it all several times. I then did the two rotations of the engine and re checked. Physical check of TDC, cams locked and pulley timing mark lined up. Also obviously the cams lobes were all facing out as per the manual.Īfter the job, when I retimed, I put the pulley back on temporarily and rechecked ALL of the above. I also took out the plug on No.1 and used a rod to determine it was at TDC. When I removed the pulley I checked that it would only bolt on in one orientation, and it would only go back as it came off. When I checked the pulley, the timing mark on the pulley lined up exactly with the mark on the timing cover. I have a tool for the cams, so they were locked in place. Obviously I checked the timing before I started the job.
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