PDA

View Full Version : 3.0 wierd noise from engine



Murphy
03-19-2011, 06:15 PM
95 spirit 3.0 543

so I'm getting this weird noise, it sounds kind of like a fast vibration. It only happens at over 4k rpm and when I'm more than half throttle. The noise increases with higher rpms or more throttle. I'm thinking its something in the valvetrain. I'm gonna clean up my lifters and see if that makes any difference.

Any other ideas?

jory
03-19-2011, 06:17 PM
rod bearing

Murphy
03-19-2011, 08:46 PM
it doesn't sound like a rod knock. At the piston?

RoadWarrior222
03-19-2011, 08:56 PM
Sure it's from the motor and not the alt or PS pump crapping out?

Murphy
03-19-2011, 09:02 PM
I cleaned out the lifters. Everything looked good in the valve train. No difference. It is very possible its coming from the alt or ps pump. I guess I'll take a ride with the belts off. I took a video, I'll post it up when I get a chance.

Ondonti
03-20-2011, 05:10 AM
Doesn't sound like anything bad from what you are saying.
I have actually had an exhaust leak that sounded like piston slap before. Stupid cars.

Murphy
03-20-2011, 12:57 PM
ran it with no belt and the noise is still there. I looked at the video and you can't really hear the noise. Mentioning exhaust, it might be coming form my EGR blockoff plate. The noise sounds like its coming more from the pass side tho.

RoadWarrior222
03-20-2011, 01:21 PM
Waterpump, cam tensioner... check for seeping coolant.

RoadWarrior222
03-20-2011, 05:11 PM
The more I think about it the more I'm almost ready to put money on it being the waterpump vanes rattling off the block. When you load up the motor, the cambelt pulls tight, pulls on waterpump, worn bearing lets it go off center, vanes hit block. One of maybe three things happen after that... waterpump gets loose enough to wedge up and strip or break the cambelt. Or vanes go loose on shaft from the impacts, resulting in poor cooling, apparent erratic cooling, as the shaft grabs and doesn't, and slips at higher engine speeds, then maybe if you don't get the clue still yet, the shaft pulls out and the pulley drops off, or moves enough to throw belt. Or thirdly, the bearing can get messed up enough to sieze when it cools off, or let the belt tension pull it really askew while parked, resulting in motor apparently being locked up.

A further clue to this happening is if you look at the radiator cap and it's got brass speckles on it underneath.

Ondonti
03-20-2011, 10:54 PM
Sucks when that waterpump seizes.
When its frozen you can at least use a propane torch to free it up :o

Vigo
03-22-2011, 02:56 AM
Yeh, im thinking timing belt tensioner or water pump as well, going off what info you have to give..

Murphy
03-22-2011, 03:39 AM
Fun, I did the timing belt about 18 months ago. I replaced the tensioner, but didn't replace the water pump.

Ondonti
03-25-2011, 06:22 AM
water pump seems like a much more important thing to take care of then the pulley. I have not seen a bad pulley though I am sure there are people who have.

Vigo
03-25-2011, 12:53 PM
i havent seen one on a 3.0 but ive seen them go bad to the point of spitting the bearings out, and those things can make a mess if they get stuck between a timing gear and a hard place..

RoadWarrior222
03-25-2011, 01:04 PM
I had some cheap chinese junk bearing do that on my Escort, not pretty. Spit bearings that is, there wasn't any domino effect damage.

Murphy
03-25-2011, 04:07 PM
I jacked up the car preparing to change the water pump and noticed that my front engine mount bracket is split. It looks like I lost the lowest starter bolt that goes through the engine mount bracket, and lower part of the bracket on the engine side split. Guess I'll grab one from the JY tomorrow and see what that does for the noise.

Murphy
03-25-2011, 04:20 PM
guess this can go up on the wall of broken parts

bakes
03-25-2011, 04:26 PM
guess this can go up on the wall of broken parts

Nice clump of grass:eyebrows::clap::thumb:

RoadWarrior222
03-25-2011, 04:26 PM
Could be the axle I guess if it's outa line torqued up.

What did you do though, ram a dirt bank? looks like it.

I broke the one on my Voyager, auto mount though, don't know how or when. Axles were already noisy (Crappy reman) at that time so didn't associate more/less noise with it.

Murphy
03-25-2011, 04:36 PM
I park it in the yard sometimes, I usually hit the yard going a bit faster than I should be lol.

How would I test the axles? I have an extra set in the attic.

Is there a difference between auto and manual mounts? This car was an auto I converted to a 5 speed, and I think I used the same front mount. I did add the bobble strut.

RoadWarrior222
03-25-2011, 05:11 PM
It's different than my mount, but they changed the auto mount in the early 90s so didn't realise it wasn't a manual mount, which may be different. The early auto/manual mounts are different.

There might be nothing really wrong with the axles (yet) it's just they'll make noise if the motor/trans swing outa line.

Ondonti
03-26-2011, 03:11 AM
Mount should be the same for 92-95

Murphy
03-29-2011, 07:59 PM
Swapped in a new mount bracket. I broke the old one in places. The noise has stopped! It drives soo much better now.

RoadWarrior222
03-29-2011, 08:23 PM
Woohoo...

Yeah, try not to bounce the tranny and oilpan off the lawn, the mounts will probably live longer :D

Ondonti
03-30-2011, 05:20 AM
Yeah, I don't know how 24v shadow broke his. I have never had a problem. I had bent one once from the junkyard and I figure they did the same thing as you to cause that awesomeness in the bracket.

Murphy
03-30-2011, 10:56 AM
I think I lost the starter bolt a while back, and it was months of city driving and generally driving the car like I stole it that broke it.

I dont think my oil pan has ever hit the yard lol

Ondonti
04-03-2011, 06:41 AM
I have lost those bolts in my daily once. I was driving home when the last one went bye bye and the motor could then move a few inches in each direction. Then I HAD to fix it :P

JDAWG
04-03-2011, 10:01 PM
I had a problem in the van, broke an axle, broke a advanced reman, put in 2 new mounts, trans and engine front, broke another advance (all in the same weekend), had the engine centered the best I could, ended up buyin a new napa that said it wan made for worn mounts so I guess it could stretch some, fixed the problem.