reedx Posted February 15, 2009 Share Posted February 15, 2009 Not sure if I've used the right name for the part, but the 110 developed a tapping noise once warm the other day. I took the rocker cover off today to check the valve clearances and one was much larger than the rest. It looks like the top has come off the top of the cap that fits between the top of the valve stem and the rocker (see photo). A few questions - there's nowhere open today to get a replacement so can I just reset the gap and use the vehicle for a few days until I can sort it? - any tricks to remove whats left of the cap? The others can turn and look like they should be able to lift off but this one seams as if if is stuck to the valve stem. - should I be worrying about where the brocken bit of the cap has gone? - are valve clearances supposed to be set hot or cold? them manual isn't clear. Last used the truck 3 hours ago and the engine is still a little warm. Cheers Colin Quote Link to comment Share on other sites More sharing options...
western Posted February 15, 2009 Share Posted February 15, 2009 clearances set with a stone cold engine, you should be able to prise the little cap out, it only sits on the top with nothing holding it in place, any bits most likely dropped into the sump. using it with no cap could damage the rocker pad, which will mean a new rocker arm. Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted February 15, 2009 Share Posted February 15, 2009 I've had about three of those where the top has gone. You can do without it for a little while, but they are there to protect the rocker arm. I would buy eight new ones, they are pretty cheap. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted February 15, 2009 Share Posted February 15, 2009 They'll be ok in the short term, but long use will cause the top of the valve stem to hammer over (like the head of an old chisel). The stem will also drill a hole in the rocker pad. Bit like this really. Les. Quote Link to comment Share on other sites More sharing options...
rick Posted February 15, 2009 Share Posted February 15, 2009 Replace the lot, they are a relatively common failure. You don't have to remove the rocker gear to replace them, just wind the rocker adjusters back. I disagree with Ralph, clearances can be set hot or cold (0.008") and they are fairly critical for good performance. I'd actually recommend dropping the sump and cleaning the shrapnel out as it won't come out with an oil change, about 200-300ml of oil stays behind in the sump when you remove the drain plug. Quote Link to comment Share on other sites More sharing options...
western Posted February 15, 2009 Share Posted February 15, 2009 Workshop manual doesn't say hot or cold just 0.20mm but doing theat on a hot engine it will be totally different when that engine cools down overnight. Quote Link to comment Share on other sites More sharing options...
rick Posted February 16, 2009 Share Posted February 16, 2009 Workshop manual doesn't say hot or cold just 0.20mm but doing theat on a hot engine it will be totally different when that engine cools down overnight. Actually it doesn't alter much if any at all which is surprising. I always used to do them cold, but a well known landy mechanic here advised me that it doesn't matter and he does them hot. He really pushes checking them every service as you can keep an eye on the caps and he's found they really affect engine performance if you let the clearances blow out a little. Quote Link to comment Share on other sites More sharing options...
western Posted February 16, 2009 Share Posted February 16, 2009 that's useful info thanks Rick Quote Link to comment Share on other sites More sharing options...
PAASKE Posted February 18, 2009 Share Posted February 18, 2009 Hi What is the partnumber for these Valve caps regards Bo Paaske Quote Link to comment Share on other sites More sharing options...
reedx Posted February 18, 2009 Author Share Posted February 18, 2009 Thank for all of the advice. Remains of cap were removed and a full replacement set ordered. Will fit asap. Quote Link to comment Share on other sites More sharing options...
western Posted February 18, 2009 Share Posted February 18, 2009 HiWhat is the partnumber for these Valve caps regards Bo Paaske ERR1158 cap valve stem protection. but more info here Quote Link to comment Share on other sites More sharing options...
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