First off let me say thanks for all the information I have found on here that has assisted me in getting as far as I have with my 86. I have read a lot of forums and found most if not all information I need for this project. I bought my truck almost a year ago and so far I've replaced the cooling system, fuel tank selector valve and thank to the previous owner the starter and battery thanks to the aftermarket push button start wires fusing. I made another post when all the trouble started and kinda just parked it and went on with my new job and car I bought out of frustration. Well now I have the motor out and the reason for that is oil pan gasket and a few of my valves are chipped on the top or pitted. I've already purchased the newer style getting away from the saddle rocker arm mount which is why I parked it in the first place. Tang wore off started a tap and then a misfire I'm assuming because the exhaust valve was able to stay open. I'm just here looking for advice on what else I should replace or do while I have it apart and on a budget. Going with arp studs and new gaskets. I'm an aircraft mechanic and this is probably the most I've torn down and engine and first diesel on top of that. Any tips would be appreciated.
6.9 engine teardown
- Thread starter Mreel19
- Start date
IDIBRONCO
IDIBRONCO
Don't use a gasket on the oil pan. It will leak. Just use a bead of RTV. If you haven't done it yet, this would be a good time to reseal the oil cooler. It's a very messy job to remove it with the engine in the truck.
I've thought about that while I have it out I've seen a few threads in here about the orings being hard to find but I think someone posted the part number I'll have to research that. I did buy a pan gasket that's rubber. As I've been tearing it down I can definitely tell it's been worked on before due to rtv on the valley pan and a few other things. Lots of loose bolts. I think I'll go with the rtv like you said only problem is the clearance in my garage I had the pan unbolted already and had to pull the pickup tube to get it out.
Knuckledragger
blowing chunks and grabbing porcelain
There are a lot of joints in the engine that require only RTV. If you have not seen a rebuild book (some online), try to do some reading, it is very enlightening.
IDIBRONCO
IDIBRONCO
There's two types of oil coolers. The earlier ones (I believe) used three o-rings on each end while the later ones used two on each end. The later ones aren't hard to find. It's the earlier ones that are. As for the garage clearance, I'm assuming that you're using a cherry picker to pull the engine out. You can let some air out of the front tires to gain some valuable inches of room./ I've even heard of a guy who would remove the front tires and set the truck down on the front rotors (after the engine is hanging from the cherry picker) in order to pull his 300-6 out of his truck. He did the sane thing to put it back in too.
aggiediesel01
Full Access Member
For RTV use the motorcraft TA-31 product. One tube is more than enough for an engine and its specifically designed to withstand exposure to diesel and diesel oil for the long term.
Google will give you several places to get it but this is the product.
https://www.amazon.com/Genuine-Ford-TA-31-Silicone-Sealant/dp/B000NUD02W
Google will give you several places to get it but this is the product.
https://www.amazon.com/Genuine-Ford-TA-31-Silicone-Sealant/dp/B000NUD02W
david85
Full Access Member
I made the mistake of using a cork gasket that came with my rebuild kit and sure enough it is starting to weep. Not enough to drip where I park, but enough to continue the oil-undercoating process of the truck. The mechanic in me wants to fix it as a matter of pride, but the tin-basher in me wants to let it leak. I'm so conflicted 
There’s also the part where you have to pull the engine out too!I made the mistake of using a cork gasket that came with my rebuild kit and sure enough it is starting to weep. Not enough to drip where I park, but enough to continue the oil-undercoating process of the truck. The mechanic in me wants to fix it as a matter of pride, but the tin-basher in me wants to let it leak. I'm so conflicted
Right on yeah I'll have to check which cooler it is. I did let air out of my tires to get it out not all the way just enough. The garage has a drop down right where my engine bay is and the driveway slopes way too much to try anything else. Taking the tires off sound like the way to go. Just gotta get the motivation to get out there and put the work in. Oh and the parts
