Join Date: Aug 2003
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What to do next ? took Volvo apart...
I Needed to disassemble My Volvo, 1980, MD7A, 13 HP engine, in order to inspect this engine for salt water dammage since it was under water for a brief period of time when it was being pulled off the rocks by a salvage company. Anyway the boat sat on stands for about a month before it was delivered to me about a month ago. As of right now the engine is broke down to just the engine short block with the transmission drive still bolted on to the engine and the engine is still attached to the engine mounts, the CAV, fuel pump, water pump, thermostat cover, front engine cover plate that is behind the flywheel is off, exaust manifold is off, of course the head is off, fuel tubing and hoses are disconected and put up, ect. ect. ect... All the bolts and nuts came off with no problems (I was worried about stripping some). HERE IS WHAT I OBSERVED, (and I am a rookie when it comes to deisel engines) The raw water channels in the exaust manifold looked surprisingly clean for a 20+ year old engine, all the seals/gaskets on all parts of the engine looked healthy, no blow throughs or dammaged areas of any gaskets or seals what so ever. all the teeth on gears were in great shape, the head looked good, the valves had some carbon on them but nothing major, The injectors had carbon on them also and looks like it will take some muscle to get them out and rebuild them, as far as I can tell the rocker arm looked fine. The top of the pistons had some thin black carbon on them but I think thats normal for an older engine, I did not see any rust or corrosion anywhere that I could see inside the engine. There was alot of salt water in the lower part of the engine (under the piston rods in the oil pan) but I got all the water out now and have sprayed other lubricants in there just in case I can''t see an area that is corroding. Water was in the air filter and surrounding area but I guess there was enough lube in that area to prevent any corrosion to happen. Also when I took the head off I noticed a little water sitting on top of the pistons, but it didn''t seem to start the corrosion process there either. I don''t know if I should take apart the transmission drive and check it for water intrusion, or if there is a easy way to check the tranny for possible water penatration. HERE IS MY QUESTION: Shoud I take the engine out of the boat and have a mechanic go over everything or rebuild the engine and replace bearings and do a valve job ect. ect. or should I just get new gaskets and paint everything and put the engine back together, get new ultranator and re build starter re wire and start it up and go on to somthing else?? Thanks for your replys and opinions. John