CheepComanche Posted June 4, 2023 Share Posted June 4, 2023 Today I was driving my Comanche when I meant to downshift from 5th to 4th but missed 4th and it went into 2nd. I quickly pushed in the clutch but the rpm still got close to 7k. It seems to not have damaged anything as it still runs fine. Is there anything I should be worried about? I have the 2.5L with an ax5. Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 4, 2023 Share Posted June 4, 2023 Redlined the 2.5L huh? Well at that speed the valves wouldve been floating and not opening and closing given how fast the RPM was. Now if you were running it at that speed for longer than what you did, youre probably fine and I would do an inspection just to make sure. Does the engine sound fine? I would be only worried about the valve train and timing chain in this instance. Maybe the distributor too. Link to comment Share on other sites More sharing options...
CheepComanche Posted June 4, 2023 Author Share Posted June 4, 2023 Everything seems to be fine, I haven't noticed any weird noises. Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 4, 2023 Share Posted June 4, 2023 I’d keep an eye and ear on it for a bit. But it sounds like you’re fine. Link to comment Share on other sites More sharing options...
pizzaman09 Posted June 4, 2023 Share Posted June 4, 2023 Agreed, it sounds like you didn't run any bits into each other that shouldn't have. Are the 2.5L and 4.0L engines even interference engines in stock form? Link to comment Share on other sites More sharing options...
CheepComanche Posted June 5, 2023 Author Share Posted June 5, 2023 The 2.5 and 4.0 are both non-interference engines Link to comment Share on other sites More sharing options...
CheepComanche Posted June 5, 2023 Author Share Posted June 5, 2023 It hasn't taken long for noises to pop up. I've now got a squealing sound from the front of the engine; I think its mostly from the alternator but maybe other accessories too. And some lifter noise. Mabey my imagination but the clutch feels like its engaging later than it used too. Link to comment Share on other sites More sharing options...
pizzaman09 Posted June 6, 2023 Share Posted June 6, 2023 When I money shifted a 99 BMW 3 series, put it back in first gear at about 60mph, the only noticable issue was a very mad throw out bearing. Over the next 3000 miles or so it slowly came around and stopped making noise and was just fine. I had that engine up around 9000 rpm, and it had a factory 6500 rpm redline. If it makes you feel better, do an oil and filter change when the engine is hot to drain the oil the best you can, maybe even flush it some. With these engines being non interference, there is not too much to worry about as it it more or less impossible to crash the valves into the pistons. Link to comment Share on other sites More sharing options...
CheepComanche Posted June 7, 2023 Author Share Posted June 7, 2023 Thanks, I will do that. I'm also planning on taking it into a shop to have it checked out as the sounds are getting worse and I am not very experienced. I know its probably fine, however it is my daily and I don't want to chance it. Link to comment Share on other sites More sharing options...
CheepComanche Posted June 13, 2023 Author Share Posted June 13, 2023 The front end engine noise was diagnosed as the alternator and idler pullies. Does this sound reasonable and is there anything else that could possibly have been damaged like the water pump and power steering pump? Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 13, 2023 Share Posted June 13, 2023 I say you’re fine. Just keep listening for other odd sounds. Link to comment Share on other sites More sharing options...
CheepComanche Posted June 13, 2023 Author Share Posted June 13, 2023 Thanks, I appreciate the insight Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 13, 2023 Share Posted June 13, 2023 No problem. If your temp climbs, then you know you have damaged the water pump, same with power steering and AC if you have those. As long as its just accessories your having to replace, I say youre in the clear. Link to comment Share on other sites More sharing options...
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