no compression

1. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #1 28th February 2010, 11:45

   hi all, recently i have changed head gasket, timing belt, water pump, sensors, loads of bits the list goes on, the car was running fine before i changed any parts just had a small leak on the head gasket hence the reason i replaced, since having the work done the car is only running on 3 cylinders and cylinder 4 there is hardly any compression at all, and just done know were to go with it, i dont think i can be piston rings etc because it was running fine before we did the work, the engine is a 1.1 tu1m any help please
   thanks
2. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #2 28th February 2010, 11:50

   sounds like a problem with the headgasket fitament ?
   
   Oil and water all okay ? Any mix in them from just turning the engine over?
3. Stevo123 Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr

   #3 28th February 2010, 12:10

   Are you sure you have no compression, ie have you tested it with a comp tester?
   
   Did you turn the engine by hand after fitting cambelt to check timing was right?
   
   Did you adjust the valve clearences after refitting the head? (you may have over adjusted the valve clearence hence valve not closing fully)
   
   Check spark plugs tightened correctly and check to make sure the tip of one has not fallen off and lodged a valve open.
   
   Have you definately got the firing order right (mixed a ht lead up perhaps)
4. aksaxovtr Frequent Poster Joined: Feb 2010 Wickow Posts: 548 green mk1 vtr and gold mk2 vtr

   #4 28th February 2010, 12:16

   i had the same problem mate, ckeck your fuel rail/injector, check the timing aswell, vavle clearance etc
5. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #5 28th February 2010, 12:38

   the firing order is correct also so is the timing, ive had them checked over at a garage the oil and water is fine they are not mixing, i have noticed when i take of my oil cap it is all creamy, the valve clearences are getting set up correctly tomorow at a garage to see if that helps, the plug in that one cylinder is black, i have done a compression test with a tester yes the other 3 cylinders the compression is spot on but on number 4 there is hardly anything
6. user_35312 Established Member Joined: Jun 2009 Coventry CV6 Posts: 2477 Slowda Octavia vRS SOLD - Cam'd Chip'd VTR

   #6 28th February 2010, 12:51

   Quote:

   Originally Posted by scrim the firing order is correct also so is the timing, ive had them checked over at a garage the oil and water is fine they are not mixing, i have noticed when i take of my oil cap it is all creamy, the valve clearences are getting set up correctly tomorow at a garage to see if that helps, the plug in that one cylinder is black, i have done a compression test with a tester yes the other 3 cylinders the compression is spot on but on number 4 there is hardly anything

   creamy cap is sign of water/oil mixing mate! You sure the gasket is seated properly?
   did you get the head skimmed, could be warped so not sealing properly
7. user_36974 Frequent Poster Joined: Aug 2009 Manchester Posts: 570 Mercury Grey VT?

   #7 28th February 2010, 12:51

   oil cap being creamy means oil and water mixing = headgasket, but also could be from before you changed it flush the oold oil out.
   as for compression could be the smalles bit if s*ite stopping one of the valves from sealing when closing.
8. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #8 28th February 2010, 12:59

   i understand when you say oil and water will make it creamy but im not loosing oil and my water level is staying the same if it was mixing i would drop water and oil would raise as its lighter than water
9. user_36974 Frequent Poster Joined: Aug 2009 Manchester Posts: 570 Mercury Grey VT?

   #9 28th February 2010, 13:00

   did you flush you old oil out properly ?
10. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

    #10 28th February 2010, 13:22

    yeh the old oil was flushed out properly but the water that was in the engine when took head off that stayed in