My names Bill, I have picked up a 1986 300SDL that has a few minor issues that I hope to start resolving after parting out my volvo. the car has been sitting in front of my garage for the past year, and the previous owner has told me that the head gasket bad
, he said that it is burning coolant while driving and he replaced the radiator, all the hoses and the thermostat. im going to talk to a few mechanic buddies to see what is the past of least resistance to get it up and running to kick off a new project after having an overboosted volvo for years.
any help will be appreciated pictures and model numbers of the motor and chassis will be posted this week.
thanks in advance, Bill
Ok so basically ask me or innovation560 anything you need. both of us have had complete restorations of the 300sdl.
The first thing you will ABSOLUTELY need to do is pull off the head and send it to a good machine shop to check over for warpage and cracking. If the warpage is minimal, they may be able to resurface it. There is a mercedes maximum and if they can't keep it within tolerances then you will have to find a new head. If it is cracked in any way, then you also have to find a new head. Repairing cracks is not really practicle. If you don't need a new head, GREAT! have it resurfaced, and install it with a new head gasket. If you want to be a real PRO, have them install new valve stem seals for under $100. If you need a new head, try to find a #18 or later head online (ebay or craigslist) or at a nearby junkyard. Either way you need a new head gasket.
Then remove your EGR system (Brian Carlton can tell you all about this). It's basically a BS EPA thing that doesn't help the environment and only compromises performance and longevity.
The remove your "ALDA" and possibly replace with a custom made "ALDA cap" just for protection.
Lastly: Please change out your differential mount and subframe bushings. Altogether it is about 1 Hour with of work and $100 aftermarket rubber parts and should completely eliminate any rear end sagging. Please save your car's dignity and self respect...
Alltogether, including the head issue, you are looking at about $600 if your head is OK and about $1200 if you need a new head.
GOOD LUCK! If you are borderline...DO IT! These are the best cars ever made and the car will be around, literally, for your great grand children to drive!