Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 05-29-2012, 06:07 PM
Registered User
Join Date: Jun 2011
Posts: 227
What engine for an 82 380sec?

This car has sat for a while, and I could likely get it really cheap, like cheap enough it would be worth fixing, but I think it will need a new engine (it starts and has good oil pressure, but has a loud rattling sound from the front of the drivers side head. I could get pretty much any long block from pic and pull for cheap (us or euro 3.8. 4.2, us or euro 5.0, or a 5.6, and the 3.0 6 or a diesel). Are a lot of parts different if I wanted to put a 5.0 in it? Or would a newer 4.2 be easier? I dont really want to put another us spec 3.8 in it, but anything else would be an option. The less related parts i have to buy the cheaper it would be though. If it is pretty much the same, I would prefer using a 4.2, but i dont know how many other parts from the donor car i would have to use.

Reply With Quote
Old 05-30-2012, 07:05 AM
Admiral-Third World Fleet
Join Date: Feb 2002
Location: Central FL
Posts: 3,068
The problem this particular engine has is likely a failed timing chain tensioner or broken chain guide. That can be fixed for about $100 ( in parts), but will shortly lead to the timing chain jumping teeth and breaking if neglected. The 81-83 380 engine came with a weak single row chain- the 84-85 had a double row ( many earlier ones were upgraded, though). Do some research on M116 and M117 timing chains...

I really don't know how "swappable" the other engines are. The fuel systems are all different- the basic blocks are the same. My guess- only a guess, is that a euro 380 would be fairly easy, next would be a US 420 (both M116s)
80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
Reply With Quote
Old 05-30-2012, 08:23 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The 1986-91 4.2 engine is the best & easiest swap.

It is better to use the intake manifold from the 3.8 engine.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
Old 05-31-2012, 02:01 PM
Hit Man X's Avatar
Join Date: Sep 2004
Posts: 9,087
Thumbs up

I too would drop in the 4.2L for ease of install. Hell, stock for stock you are gaining nearly 50hp!

Also, look around for the euro dual logs while it is apart. Bump the power up a bit more while it is all apart.
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
Reply With Quote
Old 05-31-2012, 05:47 PM
pawoSD's Avatar
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,243
If the engine is not dead, STOP running it, and convert/repair the chain! Then no swap is needed!

-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 88k - mine - (OC-91,200)
'17 Metris(VITO!) - 16k - wifes (OC-17k)
'01 E320 Wagon - 159k - mine (OC-160,000)
'01 E320 - 179k - dad's (OC-182,500)
'07 E350 Wagon - 133k - dad's (OC-132,500)
'01 SL500 - 52k - dad's (OC-52,000)
'16 E400 4matic Sedan - 70k - Brothers (OC-72,000)
Reply With Quote


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:22 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page