Acorns in my Motor... How 'bout you?

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Author Message   Chris Lessard (Thechrisr) Posted on Thursday, July 11, 2002 - 09:13 am:    I have a 95 disco 5-Speed and recently I started noticing a sound kind of like acorns knocking around coming from the lower part of my engine after it is warmed up. This has begun during late spring and is slowly getting worse. It has started since i began changing my oil with Mobil 1 (10w-30) specifically during this last 5k mile interval on the Mobil oil. Any ideas what the sound is and/or how to fix it??? Please help. Chris -Northern NJ   Ron Ward (Ronward) Posted on Thursday, July 11, 2002 - 09:21 am:    Called a "Cam" knock by some. My 1995 Range Rover Classic 3.9 with 53000 miles makes the same noise. There's a nylon cam button that gets worn down over time and produces the sound. It can be fixed or left alone. I understand the fix is costly. Turn up the radio, or turn on the a/c compressor to drown out the sound. GTHFY Ron Ward   Chris Lessard (Thechrisr) Posted on Thursday, July 11, 2002 - 09:52 am:    Thanks ron. My disco has about 78000 miles on it. I'll look into the cam button issue in the manual and see what I find. Is changing the oil at 5000mi a bad thing? It takes a while to get to 5k miles as i drive it mostly on weekends (I drive '86 Oldsmobile Beater to work during the week). The truck does leak oil though since switching to Mobil. I have had to add about 1-quart at two different times during the last 5k mile interval. All suggestions and I deas are appreciated.   Dee Posted on Thursday, July 11, 2002 - 10:07 am:    Switch back to a good quality Dino oil, i would also add a bottle of Lucas oil additive at every 3k change. Leave the mobile 1 to the turbo charged 4 bangers   Jake Hartley (Jake) Posted on Thursday, July 11, 2002 - 09:16 pm:    If you wish, and have a shop manual, a cam button installation is a easy fix. You don't even have to r&r the cam, just the timing gear.   M. K. Watson (Lrover94) Posted on Thursday, July 11, 2002 - 09:51 pm:    i have to agree with Ron, in many years of driving every imagined POS auto i have learned that what you lack in engine performance could be made up in a good LOUD radio. mike w   kyle Posted on Thursday, July 11, 2002 - 09:57 pm:    MAINS and RODS !!! Have them checked !!! These things dont have a good record with them.. It takes all of about 15-20 minutes to drop the pan and have a look....... Kyle   Mike J. (Mudd) Posted on Thursday, July 11, 2002 - 10:02 pm:    I bet it's bad cats! Mike   Kyle Posted on Thursday, July 11, 2002 - 10:14 pm:    Could very well be,,,, Definately need to get under there and listen real well... Kyle   Jake Hartley (Jake) Posted on Thursday, July 11, 2002 - 10:20 pm:    It's ok, just let 'em turn up the radio and we will have another parts truck in the for sale section   Norm Posted on Friday, July 12, 2002 - 02:37 am:    If it's a '95 it is probably not cam walk since it should be a "B" suffix motor with a cam thrust plate on the block and a peg on the inside of the oil pump/front cover to prevent that particular knock. If it coincides with switching to Mobile 1, I'd go back to dino oil (Valvoline VR-1 20W50 Racing Oil works well for me -- my Rover hated Amsoil synthetic)and see what happens. If the knock persists, get a mechanic's stethescope to trace the noise -- it may well be the cats rattling.   Norm Posted on Friday, July 12, 2002 - 03:07 am:    One other thing since you have a '95 5-speed (I have the same) -- do you notice the noise more at idle in neutral with the clutch engaged? Does the noise lessen or disappear when you step on the clutch? If so, it could be a bad clutch or loose flywheel. Otherwise, you might check the transmission as well.   Larry Grubbs (Larryg) Posted on Friday, July 12, 2002 - 11:05 am:    Check your pnuematic fluid. This can cause all kinds of weird sounds. Also when the flux capacitor went out on my rig there were some odd sounds as well. Larry   Curtis N (Curtis) Posted on Friday, July 12, 2002 - 12:09 pm:    Nononono...it is definately not a flux capacitor. As you know, they make loud "pop" and "pap" sounds. It is most likely the external valve fribulator or the piston sump relay. They sound just like acorns. In this case, Jakes suggestion is best: turn up the radio 'til it dies then notify Dwebbers of where the truck is resting. Curtis   disco Posted on Friday, July 12, 2002 - 02:51 pm:    maybe the hamster that runs on the wheels to get all that horse power out of these engines finally died and its making a thumb sound everytime the wheel turns... get it check by a mechanic..   Norm Posted on Saturday, July 13, 2002 - 03:49 am:    I can't believe anyone's still running an old flux capacitor in their Rover. I got mine upgraded to dilithium crystals under warranty. ---Norm   Robert Sublett (Rubisco98) Posted on Saturday, July 13, 2002 - 08:22 am:    I mined dilithium crystals and sold them to illegals here in the U.S.   Chris Lessard (Thechrisr) Posted on Monday, July 15, 2002 - 01:30 pm:    I checked the Flux Caoacitor.. and even though its getting old it seems to be working A-Okay. The sound doesn't seem to be from the cats though. I do get a sound from the clutch that goes away when pressed but none of them seem to be related to the acorns in the engine. The sound is noticable during Idle after warm-up and when you drive along a wall (i call this the echo effect). Maybe if i put a squirrel in the oil filler cap it can catch the nuts. I'll definitely check out the suggestions though.   gp (Garrett) Posted on Monday, July 15, 2002 - 01:33 pm:      Kyle Posted on Monday, July 15, 2002 - 01:44 pm:    Mains and Rods..... Kyle   Rob Davison (Pokerob) Posted on Monday, July 15, 2002 - 05:18 pm:    there you go again kyle wit the overly descriptive fix and explanation, you know the next question is going to be, so just answer it the first time.. rd   Paul T. Schram (Paulschram) Posted on Tuesday, July 16, 2002 - 10:26 am:    OK, if it's mains/rods, how's the oil pressure? Does the noise only occur during idle and go away when gently revved? If not, and the oil pressure is acceptable, it is highly unlikely it is the bottom end. Is that better Rob?   Rob Davison (Pokerob) Posted on Tuesday, July 16, 2002 - 12:15 pm:    well i appreciate the thought, but i was trying to teach kyle a lesson, the boy just posts and run's and then the person asking has to wait another 6 hours before kyle completes the answer.. it's a pattern of lazyness that is typical among people with mullets , though rd   kyle Posted on Tuesday, July 16, 2002 - 05:38 pm:    Well Paul is wrong , and Rob ? if anyone has a Mullet its you. The Rods and mains being shot in these things is quite common. There have been a few here that went through all the BS only to end up putting in new mains and rods anyway. I should descripe to the guy how to put them in Rob ? If I have to explain he probably shouldnt be doing that kind of work.. Kyle   Rob Davison (Pokerob) Posted on Tuesday, July 16, 2002 - 06:31 pm:    well,, i 'm waiting rd   ccdm3 Posted on Tuesday, July 16, 2002 - 07:03 pm:    I had the same sound coming from my 98 Disco and it ended up being the right rocker. I got a new assembly and no more noise. Chad   kyle Posted on Tuesday, July 16, 2002 - 07:29 pm:    Well chad , you cant say its the same sound , Hell , none of us know what it sounds like. Could be the exhaust leaking for all we know.... I am taking it as he has already chedcked the obvious and the noise is low in the engine... Yeah sound travels but a rocker and a main sound completely different. kyle   ccdm3 Posted on Tuesday, July 16, 2002 - 09:31 pm:    Just a suggestion. By the way...Kyle, thanks for the spring and shock link in tech. I saved about $500 by doing it myself! Chad   Kyle Posted on Tuesday, July 16, 2002 - 10:11 pm:    Not busting your balls , just saying that its pretty damn hard nailing down exactly what something is on here. I like to have them check the worst case scenario things first. That way they dont keep driving thinking its a cat con and blow the bitch up/... Kyle   Chris Lessard (Thechrisr) Posted on Wednesday, July 17, 2002 - 01:43 pm:    Okay, Okay, I don't mean to start any fights here. I'll try to get it looked at soon. I wish the d-web has a sound bite option for the tech section.