Thread: 745TD rebuild
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Old 09-22-2013, 05:21 PM
v8volvo v8volvo is offline
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Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,622
Default 745TD rebuild

This was a project that started earlier this year, just got it back on the road a few weeks ago. Here are some pictures.

Starting point, car was in disarray under the hood after a previous rebuild that didn't last and subsequent 5 years sitting with the head off after it got taken apart. Several major parts AWOL and the others in rough shape... Sorry for crappy phone pics.





Disassembly and inspection, found a few issues. One functional problem that this car was known to have been having when it was last on the road was difficulty engaging a gear from a stop. Had been chalked up to maladjusted clutch but a more likely explanation was visible with the motor hanging in the air:



This was an aftermarket pilot bearing with no seal that was installed less than 20,000 miles ago during the previous rebuild; as expected with no way of retaining its grease the bearing had a very short lifespan, probably significantly less than the 20k the motor provided before it too expired.

Continuing disassembly many issues were found, including several failures that were quite unique and interesting which deserve their own thread for further pictures and description so I'll save the details on those for later. The single biggest concern was corrosion on the cylinder walls that occurred while the motor sat with the head off. Unfortunately I did not take a close picture of this but it is partially visible here.



Parts back from cleanup at the machine shop and the news was not good, #6 cylinder pitted deeply enough that there were areas the hone did not touch. Otherwise it was in nice shape with no real wear at all given the low miles it had run, but unfortunately since this motor was already bored to the max .040 oversize during the last overhaul there is no room to cut any further; this block has reached the end of the road.




Last edited by v8volvo; 09-25-2013 at 09:27 AM.
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