slight rumbling noise

Post by **dalebrignall** » Sat May 10, 2008 5:42 pm

i had a recon engine fitted 2 years ago and i have changed the oil regually.the oil pressure is showing 58 on the motorway and 40 on tickover. dont get a knocking big end sound when i pull away,just a slight rumble at aprox 2000 rpm.still not using any oil.its got an unleaded head doing the tappets on monday am i worring too much

Post by **Packedup** » Sat May 10, 2008 7:26 pm

Well, it could be main bearings - They rumble rather than knock.

My Metro engine had a bit of a rumble, I've done about 3000 miles in it (all with a heavy right foot), and now it has a vibration, a rumble, and no oil pressure when hot...

You've probably not got anything to worry about, but it's worth being aware there could be a serious problem waiting to happen. At least bearing shells are quite cheap and not too much of a swine to fit (aside from pulling the engine).

Post by **kennatt** » Mon May 12, 2008 8:18 am

thats the trouble with recons you never really know what has been reconned.Main bearings do rumble when worn ,but usually you get the death rattle when you first start up.Your pressure looks ok.May be something other than bearings.

Post by **dalebrignall** » Mon May 12, 2008 4:16 pm

ive had the tappets done and they were a long way off,there is a small noise now but nothing like it was

Post by **rayofleamington** » Mon May 12, 2008 4:48 pm

40psi on a hot engine at idle sounds fine. You need to get much less before it's time to worry.
The oil pump is not designed to give releif-valve pressure at idle when hot - if it did that it would be oversize and would reduce the efficiency of the engine when running at speed.

As for the rumble - that sounds annoying. Are you 100% sure it is the engine and not something else in the drive train?

Post by **Kevin** » Mon May 12, 2008 10:55 pm

Are you bringing it Wednesday Dale ? there should be a few heads around to have a listen

Post by **dalebrignall** » Tue May 13, 2008 6:18 pm

ill be briniging myrtle tomorrow id better give her a wash covered in dust from the drive

Post by **bmcecosse** » Fri May 16, 2008 12:25 am

That oil pressure should be fine , doubt it's engine bearings - look for something else!