 » Site Navigation | | | | » Recent Threads | | | looove 04-16-2024 01:18 PM 04-16-2024 01:18 PM 0 Replies, 2,012 Views | |  |  |  | |  05-24-2009, 01:33 AM | #1 | | Junior Member Join Date: Apr 2009 Location: Battle Ground, WA Posts: 27 |  M42 VS M44
How do you tell the differance? |  |  | | 05-24-2009, 01:40 AM | #2 | | NOBODY F's with the Jesus Join Date: Oct 2006 Location: Ventura California Posts: 7,824 |
what year of car is it in? '95's have m42's while '96+ have m44's. Quick way to tell for sure, m42's have an aluminum thermostat housing. You can also look under the car, m44's have a pre-cat and post-cat o2 sensor while m42's only have a pre-cat sensor. m42's usually have an aluminum oil filter housing cap, but some of the later models came with plastic ones like the m44. | | | | | 05-24-2009, 01:58 AM | #3 | | Junior Member Join Date: Apr 2009 Location: Battle Ground, WA Posts: 27 |
Its a 95. aluminum oil filter housing cap.
Will a M44 head work on a M42? | | | | | 05-24-2009, 04:02 AM | #4 | | Senior Member Join Date: Apr 2008 Location: Austin Posts: 3,059 |
Sorry for the hijack, but a quick question. Will a 95 thermostat work on a 96+? __________________ Come get a ti-shirt
Quote: | From the e30 M3, evolved the e36.
They were "Keepin it Real" when they introduced the 318ti ClubSport in '95 and the 318ti Sports from '96 to '99.
After that... well nothing else really matters. ~Jess | | | | | | 06-01-2009, 09:15 AM | #5 | | Senior Member Join Date: Feb 2007 Location: MA Posts: 163 |
yes | | | | | 06-01-2009, 09:15 AM | #6 | | Senior Member Join Date: Feb 2007 Location: MA Posts: 163 |
the easiest way to tell is the MAF sensor vs the AFM sensor. m42 has the big flapper afm, m44 has a nice smooth maf | | | | | 06-01-2009, 02:10 PM | #8 | | Senior Member Join Date: Aug 2008 Location: Raleigh/Charlotte, NC Posts: 1,233 |
Thermostat housings are not interchangeable.
No clue about the heads being interchangeable, my guess would be no though. __________________ -Jeff
 | | | | | 06-01-2009, 05:30 PM | #9 | | Senior Member Join Date: Feb 2007 Location: MA Posts: 163 |
he just asked about the thermostat, not the housing. | | | | | 06-01-2009, 06:04 PM | #10 | | Senior Member Join Date: Aug 2008 Location: Raleigh/Charlotte, NC Posts: 1,233 |
as jess said, the thermostat is integrated into the housing on the M44, not on the M42. __________________ -Jeff
| | | | | 06-02-2009, 12:19 PM | #11 | | Senior Member Join Date: Feb 2007 Location: MA Posts: 163 |
sorry, yeah you're right. | | | | | 06-03-2009, 09:56 AM | #12 | | Senior Member Join Date: Jun 2006 Location: SOUTH Jersey Posts: 1,085 |
another difference is the intake itself. The M42 has a simple "log" style intake while the M44 has a curvy two stage intake to broaden the torque curve | | | | | 06-12-2009, 08:06 PM | #13 | | Junior Member Join Date: Jun 2009 Location: The Netherlands Posts: 1 |
Which is considered to be the overall better block? Tuneability, gas mileage, maintenance required? Quote: Originally Posted by Mad-Machine  another difference is the intake itself. The M42 has a simple "log" style intake while the M44 has a curvy two stage intake to broaden the torque curve | Is there any benefit in swapping the intake? (if possible) | | | | | 06-12-2009, 08:57 PM | #14 | | Senior Member Join Date: Jun 2007 Location: Odenton, MD Posts: 419 |
Quote: Originally Posted by Cygnae Is there any benefit in swapping the intake? (if possible) | I've been looking into this today, and I haven't seen any hard data, but it looks like "probably not". If your DISA valve is working properly on the M44, you'll have better lower end torque and better higher RPM horsepower due to the intake runner length change. | | | | | 06-12-2009, 09:02 PM | #15 | | Senior Member Join Date: Apr 2008 Location: Austin Posts: 3,059 |
I just noticed. The m44 has a intake tube, that rams air behind the passenger headlight, and loops around fan; while the m42 just rams it directly from the drivers side. __________________ Come get a ti-shirt
Quote: | From the e30 M3, evolved the e36.
They were "Keepin it Real" when they introduced the 318ti ClubSport in '95 and the 318ti Sports from '96 to '99.
After that... well nothing else really matters. ~Jess | | | | | | |
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