bushwhacker Posted November 11, 2008 Share Posted November 11, 2008 I have just done a timing belt replacement after the old one snapped. In a Disco 200tdi, she started first turn of the key and is not smokey but there is this thud thud noise coming from the right hand side as you look in and seems to be echong into the air filter? Can an intercooler become air locked or am I way of track? Any thoughts anyone Regards Quote Link to comment Share on other sites More sharing options...
disco_al Posted November 11, 2008 Share Posted November 11, 2008 did you check the push rods? could be a bent one in there somewhere Quote Link to comment Share on other sites More sharing options...
andyb Posted November 11, 2008 Share Posted November 11, 2008 erm...I guess if one or more valves was not opening fully you could hear an odd induction noise. I was going to say are you sure that the belt is tensioner properly and what you are hearing isn't it flapping against in the inside of the timing cover. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 11, 2008 Author Share Posted November 11, 2008 Thank,s I did put all new pishrods in when the new belt was fitted. And made sure they were seated ok. Only thing I did notice when setting the gaps I had to drop the valves by turning the cam pulley? not the crank pulley?Is this normal? The pulleys were set at their mark,s and locked then the belt put on with no slack until the adjuster. She started ok would this not suggest the belt was ok? A mate had a listen and he reckons it is a bent valve? So I took of the rocker arm only to find one bent pushrod. I have went on in and took the head of but I need the wee do hicky to release the valves. More work to-morrow. Regards Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted November 11, 2008 Share Posted November 11, 2008 1st with no cambelt fitted, yes you would have to turn the cam sprocket to adjust the valve gaps. Secondly I would guess that you have a stuck (closed) valve which has caused the bent pushrod. although I am supprised that this did not show up when setting the valve gaps. Pete. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 11, 2008 Author Share Posted November 11, 2008 I am just getting back in to tinkering. I know there is a tool to release the valves but can it be done without it? Keen to find the problem. I was quite surprised when I lifted the head off and seen the 4 pistons with the dished out section. What is it for? If I don,t ask I will never know, just tring to make Land Rovering a bit cheaper. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted November 12, 2008 Share Posted November 12, 2008 The pistons are dished because that's where the engine fires. Les. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 12, 2008 Author Share Posted November 12, 2008 Thank,s that makes sense. Any thoughts on how I could have bent 1 of the new pushrods. I havn,t managed to release the valves to check them. Should I replace all 8 or just the damaged ones? I will post my findings. Is it always advisable to put a new head gasket on any time the head is off? The head gasket has 3 holes so it is standard yes or no. And it appears in good nic. Thank,s to all who have replied. Fantastic forum. I can honestly say it is the only one I would use for advise. Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted November 12, 2008 Share Posted November 12, 2008 Secondly I would guess that you have a stuck (closed) valve which has caused the bent pushrod. although I am supprised that this did not show up when setting the valve gaps.Pete. From the post about 3 above this one. Pete. Quote Link to comment Share on other sites More sharing options...
Lars L Posted November 12, 2008 Share Posted November 12, 2008 Well, if you turned the cam only when adjusting, one of the pistons could have been in the "wrong" place. There isn't enough room for a valve to open if the piston is too far up... Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 12, 2008 Author Share Posted November 12, 2008 It must be old age setting in, I seem to need to be reasured more these days. I used to be so indecisive but to be honest I am not sure any more either. I suppose the bent valve could have occured when the timing belt snapped in the first place, and me trying to get away with not taking the head off first time. It did open all the valves (at least that,s my story) when I was setting the tappets as you can just see it about to close before the pulley needs to around the horn on another revolution. Lesson learnt!!!!! Quote Link to comment Share on other sites More sharing options...
Les Henson Posted November 12, 2008 Share Posted November 12, 2008 If you've bent a valve - either when the belt snapped or when you were trying to do the tappets - it will be the first time I have ever come across it. Never re-use a head gasket Les. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 17, 2008 Author Share Posted November 17, 2008 Not that I didn,t beleive. When I took the rocker shaft off I found a bent push rod in one of the 8 new replacements. So I took the head off any how. Had a look at the valves which all slid out with a light press of the finger so no bent or sticking valves. Head and block look good for an engine with 211,000 on it. How I bent one of the new push rods I have know idea but I will make sure to check all on re-assembley. Big thanks for all the help guys. I,ll be back I am sure. The 110 d na is playing up. I have an engine change to do in the Lightweight. VM to VM. The Range Rover is running and driving (on private ground), after lying for about 18 months, good ol gal Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted November 17, 2008 Share Posted November 17, 2008 It is possible the pushrod was not seated properly in the tappet slide. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 17, 2008 Author Share Posted November 17, 2008 Yeah I was warned about that and tried to prevent it happening , funny enough it was the back pushrod at the bulk head. Quote Link to comment Share on other sites More sharing options...
bushwhacker Posted November 25, 2008 Author Share Posted November 25, 2008 For anyone who interested I have managed to get the Disco going again. And running quite sweet, I even managed to drive it out of the garage. I now need to road test it. I must have had 1 push rod not located properly the first time. It is a job I feel I could do again although I have to say would have been a lot easier to change the belt when it was not snapped. Thank's for all the advise and help guys. Quote Link to comment Share on other sites More sharing options...
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