Discussion in 'LR4' started by Krill, Jan 26, 2019.
Any news of the pumps replacement?
tightened the bolts/screws that hold it in place. need to pull the skid plate off to check it again. new pump was quite pricy so I don't think ill be changing it out.
I tried the bolts tightening trick, alas no luck, so I ordered a new seal, re-installed and all is ok. Btw that FoMoCo part has now been superseded with a new one (LR082226) I did order this but I'll wait to install. Let's see how the old one fairs up.
Thanks for info. I too tightened mine with no luck. Let us know how the new seal works. I still have vacuum so guessing all that need replacing is the seal.
Did you drain oil? Just want to verify it’s necessary.
The seal part # is LR012685 - about $13.00 online
No I didn't drain the oil, I just let it leak out of the housing until it stopped, but I did measure how much came out. I put about 2 quarts back in after completion.
Good info. Let me know how the repair holds up. Will likely give it a go if yours is successful
It appears the primary leak points for the vacuum pump can be either between the pump and the oil pan/block OR from the front cover of the pump itself. The pump is p/n LR048796, although this may have been superceded to a new number.
With a new pump at ~$400 for OE, or ~$250 for OEM Pierburg, I'm curious what the likelihood is the leak is from the O-ring on the back of the pump. This O-ring is available separately (p/n LR012685, ~$17 MSRP). The FSM seems to indicate the oil pan should be drained before removing the pump. The stamped-steel front cover of the pump may have another O-ring seal but that isn't sold separately, and I don't know what the pump looks like with the cover removed - couldn't find anything on the interwebs.
I'd be a bit annoyed if I replaced the O-ring on the back only to find it was leaking from the front cover.
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