Bent rod 671

Scott Crosby · August 19, 2014, 01:33:41 PM

This bent rod was a big surprise to me today.

The blower started leaking lots of oil I'm wondering if it caused some sort of hydraulic pressure build up in this hole? It didn't smoke at all during the 600 mile trip home. Then 2 days later lots of smoke on start up. I never used and starting fluid on it. Maybe it's been like that for a long time but it was still enough compression to fire that hole? Rod rubbed a huge gouge out of the liner bottom. It's ugly. Visual inspecting the crank looks great and the bearings look good.

Purplewillie · August 19, 2014, 01:41:39 PM

Ouch

luvrbus · August 19, 2014, 03:05:53 PM

That is the old trunk type piston looks like it got a shot of water and started to seize probably because it wasn't fitted to block and drove in with block of wood and hammer. Looks like it has gotten hot also those weak rods take very little to bend they start with a slight bend and get worse as the engine runs over time, change over to crown pistons with 92 rods that will make you a good engine

Scott Crosby · August 20, 2014, 01:34:21 PM

It's an inline so those 92 rods won't work. I checked with Don to see if he had a set of used ones, but he only has for turbo's.

luvrbus · August 20, 2014, 01:56:52 PM

Nope the bearing journal end is not wide enough for a 6L71 but you can buy new style rods for the 6L71 either for the trunk or crown pistons

Scott Crosby · August 28, 2014, 08:23:18 PM

I didn't run the rack yet, but it's back together and running. The blower internal oil leak is also fixed, but the ends of the blower are leaking oil on the outside. I think I just need to replace the copper washers as I just reused the old ones. The exhaust manifold is still off. I didn't have the air filter system on yet because I needed to make sure the new blower oil seals were not spewing oil. The fuel injector failed it's test too from that cylinder so it got a new injector because it wasn't atomizing correctly.

Here is a video of It coming back to life. There was a little puff of smoke at startup but the blower oil leak had oil all over the air box. It hunts a tiny bit for a couple seconds but not bad concerning nothing is adjusted yet on the rack.

http://youtu.be/nRYXSalyDYE

Scott Crosby · August 31, 2014, 11:31:53 AM

I had to take the blower back off to stop it from leaking oil. I used a gasket set for a 8v71 I had sitting on the shelf. If anyone ever asks the answer is no you can't use a V series blower gasket set on the inline. All the bolt holes line up but the corners are totally different and it will leak really bad

my bad.... I did use the correct blower installation kit but the end cap gaskets I didn't use the correct ones.

gumpy · August 31, 2014, 12:27:10 PM

Can't imagine why that leaked. The gasket isn't broken!

luvrbus · August 31, 2014, 12:34:11 PM

it is a misfit how on the world did you do that

Scott Crosby · August 31, 2014, 12:59:15 PM

when I laid it on the cover and all the holes lined up from the 8v set I had and I got excited... it looked like it lined up correctly, but clearly it's different. It's a little less obvious on the the cover.... my bad