R3VLimited Forums

Go Back   R3VLimited Forums > E30 Technical Forums > Engine & Drivetrain > M42

Reply
 
Thread Tools Search this Thread
Old 01-24-2017, 11:17 AM   #16
Sladek
Wrencher
 
Join Date: May 2016
Location: Columbus, OH
Posts: 209
Quote:
Originally Posted by bmwman91 View Post
Yeah, maybe it is the recording, but that M42 sounds normal. There was a slight "clanking" in your first video, at ~3500RPM. It sounded sort of like a loose catalytic converter core, or as Toaster said, something in the exhaust rubbing on the chassis.
so i checked this again after running it and standing over the engine on the header/passenger side i can sort of hear the sound coming from down the header side/under the car.

havent had a chance to have a buddy/gf help rev the engine while i was under the car but im starting to suspect a heat shield down there. ill try and update further.

as for the oil leak im not sure where it is but the freshest looking oil is near the sensor down on the passenger side (crank posiiton sensor?). i don think the sensor is leaking but maybe something near there. the timing case is slathered in rtv from the previous owner so im guessing i just need to redo the gaskets and that should fix it. if it doesnt ive replaced about every gasket on the motor and i just wont worry about it. hopefully its not a cracked timing case.


if anyone has any ideas for cleaning up the engine to pinpoint the leak other than tons of cans of degreaser lemme know. i might just take it to a detailer and let them figure it out
Sladek is offline   Reply With Quote
Old 01-24-2017, 01:21 PM   #17
roguetoaster
R3V Elite
 
roguetoaster's Avatar
 
Join Date: Jan 2012
Location: Port Republic, MD
Posts: 4,426
Simple Green/Citrus Degreaser sprayed on heavy, agitated with a brush, rinsed off. Should do most of the grease, however, if it's caked on just use a scraper.

Chances are that you have a timing case oil leak or a front crank seal issue.
roguetoaster is offline   Reply With Quote
Old 01-24-2017, 03:51 PM   #18
Sladek
Wrencher
 
Join Date: May 2016
Location: Columbus, OH
Posts: 209
can someone direct me to a comprehensive list of things I should change if I dive into the timing cover? mainly since I started digging though real OEM and just want to know all the good things to do while I'm in there

things I don't need:
timing chain
timing chain tensioner
exhaust and intake cam sprockets

everything else I don't know the condition of and I'm trying to get this bad boy where I won't need to open it up again any time soon. water pump? idler sprocket? thermostat? certain bolts?

I briefly looked into timing case updating to the newer style but sourcing everything and potentially having to do the inner side seems like more work than I'd like
Sladek is offline   Reply With Quote
Old 01-24-2017, 04:39 PM   #19
roguetoaster
R3V Elite
 
roguetoaster's Avatar
 
Join Date: Jan 2012
Location: Port Republic, MD
Posts: 4,426
Idler sprocket, crank sprocket, crank seal, profile gasket (but only if it looks bad), guides if you want to keep it basic. The WP/thermostat aren't bad to replace at a later date.
roguetoaster is offline   Reply With Quote
Old 01-28-2017, 04:25 PM   #20
flying_violin
Grease Monkey
 
Join Date: Jan 2011
Location: Denver, CO
Posts: 325
Doesn't look like anyone has mentioned the metal shield thing on the side of the engine over the exhaust manifold that runs under the ignition wires. One of the tabs broke off mine and it rattled pretty good.
__________________

Alpine II 318is
flying_violin is offline   Reply With Quote
Old 05-19-2019, 05:50 PM   #21
Powling
E30 Fanatic
 
Powling's Avatar
 
Join Date: Jan 2015
Location: Toronto
Posts: 1,225
Sladek did you ever figure out the rattle issue for sure? I'm having the exact same thing right now and would love to know what your solution was so I can start there!
__________________
Steve Toronto
1991 318is Brillantrot
Build Thread
Powling is offline   Reply With Quote
Old 05-20-2019, 06:58 AM   #22
roguetoaster
R3V Elite
 
roguetoaster's Avatar
 
Join Date: Jan 2012
Location: Port Republic, MD
Posts: 4,426
Start tapping things until you find the issue.

This past week I had a rattle I couldn't figure out until I tapped the collector ahead of the catalyst, and I discovered that the oxygen sensor element had come loose, but remained within the cage.
roguetoaster is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 07:32 PM.


Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 2004 - 2020 R3VLimited LLC