PCW Posted December 27, 2005 Share Posted December 27, 2005 Has anyone experienced a rattle or knocking noise first thing in the morning when you first start the RX400h and the gas engine come on? I have noticed this on ocassion, but it seems to go away after the engine warms up. I had the dealer look over the engine a few weeks ago and they could not find anything that appeared to be loose. Any ideas would be appreciated. Quote Link to comment Share on other sites More sharing options...
rexmiami Posted December 27, 2005 Share Posted December 27, 2005 If you are using 87 octane gas it is possible that you need to go up a grade. I have been using 87 octane in Seattle and have not experienced any knocking. Quote Link to comment Share on other sites More sharing options...
PCW Posted December 27, 2005 Author Share Posted December 27, 2005 If you are using 87 octane gas it is possible that you need to go up a grade. I have been using 87 octane in Seattle and have not experienced any knocking. Thanks. Using 89 octane Mobil. It's not that kind of noise, it's like metal-on-metal knocking together. Quote Link to comment Share on other sites More sharing options...
katzjamr Posted December 27, 2005 Share Posted December 27, 2005 i had that problem with my old explorer on cold startup, it was a timing chain problem. after sitting overnite on cold startup there would be a ten second rattle like marbles in the engine until it was lubed. i dont know if this is your issue, it was a known problem in 99 ford explorers with the v6 Quote Link to comment Share on other sites More sharing options...
PCW Posted December 27, 2005 Author Share Posted December 27, 2005 i had that problem with my old explorer on cold startup, it was a timing chain problem. after sitting overnite on cold startup there would be a ten second rattle like marbles in the engine until it was lubed. i dont know if this is your issue, it was a known problem in 99 ford explorers with the v6 Thanks. That's very interesting! Quote Link to comment Share on other sites More sharing options...
LexInfo Posted January 6, 2006 Share Posted January 6, 2006 i had that problem with my old explorer on cold startup, it was a timing chain problem. after sitting overnite on cold startup there would be a ten second rattle like marbles in the engine until it was lubed. i dont know if this is your issue, it was a known problem in 99 ford explorers with the v6 Thanks. That's very interesting! it might be your injectors ticking, they have the same problem on the 330's Quote Link to comment Share on other sites More sharing options...
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