Rattle on overrun when cold

Need technical Q/A then you're in the right place

Moderator: martauto

Jos
E30 Zone Camper
E30 Zone Camper
Posts: 1104
Joined: Mon Jan 17, 2005 11:00 pm
Location: Belfast

Post Thu Sep 06, 2012 10:11 am

Hey guys, I'm think I know what it's likley to be but I thought I'd ask incase I'm over looking something:

94 e36M42 engine 157k on it - no idea of service history.

Since fitting this I've noticed an ever increasing rattle when the engine is cold, it is rpm related and is noisiest when engine braking. It goes away within 5mins of start.

My thought is a lubrication issue or something related to the chain/tensioner? Any other options, I can post a recording of it if needed.
'89 Touring - slightly rippled with a rusty underside
'94 e36 tree climber
User avatar
e30cheeseman
E30 Zone Newbie
E30 Zone Newbie
Posts: 70
Joined: Fri Sep 07, 2012 11:00 pm

Post Sat Sep 15, 2012 9:30 am

Did you find out what it was?
Grrrmachine
E30 Zone Wiki / Team Member
E30 Zone Wiki / Team Member
Posts: 8043
Joined: Sat Feb 09, 2008 11:00 pm
Location: Warsaw, Poland

Post Sat Sep 15, 2012 9:41 am

The solution won't apply to you unfortunately, cheeseman. Jos's engine is a chain-driven M42, while yours is a belt-driven M20.