No. Replacing a stationary rubber block will not rupture any seal. Obviously support the engine from the bottom with a jack+wooden block and tighten to whatever ft-lbs as specified.

 

rear seal leaked immediately after shop replace m. mount

I had the timeing belt, water pump and motor mount replace by a local shop. My pilot has 100K mileas and never leaked a drop of oi - it was leaking bad from the rear seal as soon as I got it home from the shop. this does not make sense.

 

I had the timeing belt, water pump and motor mount replace by a local shop. My pilot has 100K mileas and never leaked a drop of oi - it was leaking bad from the rear seal as soon as I got it home from the shop. this does not make sense.

Much more plausible that your crankshaft got a shunt during the timing belt change, I'd have thought. Can't see exactly how one would be likely to cause the other. When you say rear seal, you mean the junction between the right hand side of the engine and the transmission, right?

 

Define "local shop."
Weird that you have a leak.

 

motor mount replaced

It was a small shop. I just thought it strange that it happened when the work was done. Did not know if when replacing the mount that it could have put pressure on the seal (between engine and transmission) if it were not supported properly till the new one got put on.

 

.....Did not know if when replacing the mount that it could have put pressure on the seal (between engine and transmission) if it were not supported properly till the new one got put on.

Which motor mount? The passenger side one?

 

Is the leak at the timing belt end or the tranny end?

 

It is at the rear seal between trans and engine.

 

Regardless of which motor mount, unless the shop was really incompetent then I can't see how your seal would be compromised because of a mount.

Naturally we hope you took your car back to that shop but I bet it will be "we didn't do that, it was probably there when you brought the car in."

 

Did they do an oil change at the same time? Some places habitually overfill engines, and if the oil level reaches a main seal, it will cavitate, and ruin the seal.

 

It makes no sense unless someone took a FBH (fr*gg*n b*g hammer) and whaled on the crankshaft during the belt change. Which you don't need to do.

 

This just happened to me this week!! Same thing! Don't get it either.

 

While I cannot see how they caused the rear main seal to leak, as a matter of course, I usually look at the last thing that was done when a new problem crops up. Often, working on one problem unintentionally causes another problem to crop up.

 

Identical Issue

2004 Honda Pilot EX-L

Fairly recently I had the motor mounts, timing belt, water pump, all other belts replaced and now also have a rear main seal leak. Is it possible that not properly supporting/handling the engine during motor mount replacement could stress the rear seal? I don't trust the guys that did the work because they tried to swindle me out of the rear motor mount. I called them on it and they suddenly said they just forgot... though they didn't forget to charge me for three of them.

F.Y.I. It was Christian Brother's Automotive. Never again. Highest price and highly untrustworthy.