By Jose A Cabrera (Jcabrera) on Friday, November 16, 2001 - 01:23 pm: Edit

96 Disco SE with 90K miles.
Always serviced and maintained adequately. I recently developed a knocking sound from the engine only when the engine is cold. Unusually in the mornings. What's the problem? How to fix it? Any suggestions?

By Robert Mann (Oldscout) on Friday, November 16, 2001 - 01:39 pm: Edit

You many just have a bad bleed back valve in your oil filter.

By Jose A Cabrera (Jcabrera) on Friday, November 16, 2001 - 01:49 pm: Edit

I just changed the oil and filter (LR original) two days ago.

By Robert Mann (Oldscout) on Friday, November 16, 2001 - 01:59 pm: Edit

Sounds like a bumm filter.

By Jose A Cabrera (Jcabrera) on Friday, November 16, 2001 - 04:33 pm: Edit

bumm filter? bad?

By Robert Mann (Oldscout) on Friday, November 16, 2001 - 05:29 pm: Edit

Main Entry: bum
Function: adjective
Etymology: perhaps from bum
Date: 1859
1 a : of poor quality or nature : INVALID, INFERIOR b : acutely disagreeable
2 : not functioning because of damage or injury : DISABLED

Sorry about the added M

By Jose A Cabrera (Jcabrera) on Friday, November 16, 2001 - 05:35 pm: Edit

10-4. But, this problem started before the last oil change (2 days ago). IS there a possibility of two bad oil filters? what else could it be?

By Tate (Tate) on Friday, November 16, 2001 - 05:43 pm: Edit

Jose,
You aren't alone. I've got a similar knocking at startup on my 98. At about 1000-1500 rpm, it's audible. At idle or above this, it's not apparent. When warm, it runs like a champ. When it's cold and has sat for a while, it knocks for a while. Has happened for quite a while, and two indepenent shops have either not heard it or dimissed it. It's happened with more than one of 3 different types of filters including genuine, and across 3 oil weights (15w-50 mobil 1, 5w-30 castrol and mobil 1, and 10w-40 castrol and regular mobil). I try and just let it warm up a bit before I start driving in the mornings.