Piston coolers (oil nozzles): how difficult to change? - BMW M5 Forum and M6 Forums
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post #1 of 3 Old 12th July 2016, 01:12 AM Thread Starter
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Piston coolers (oil nozzles): how difficult to change?

Hi guys,

I am thinking of doing the updated oil spray nozzles that cool the piston bottoms. Can these be changed relatively easily while the connecting rod bearings are changed using the "simplified method" (take front suspension apart, remove oil pan, leave engine in car, etc.)

Also, would this be a great time to change a TBA as well? Not sure what needs to come off the top of the engine, if anything, during a rod bearing swap.

Thanks!

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post #2 of 3 Old 12th July 2016, 01:21 AM
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for the oil spray nozzles, see #53 in this DIY.

JColley says that you don't have to take off the top part (intake manifold, coils, spark plugs) because you're not really cranking the engine around by hand. He says that it saves 2 hours. If you do take it off, the TAs are right there to be swapped out.
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post #3 of 3 Old 12th July 2016, 01:12 PM
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Yes the oil squirters are easy to replace while doing rod bearings. Use a long 1/4 drive extension. I remove the spark plugs because I usually do a compression test first, but mainly I remove them so that I can prime the oil system using the starter. I like having the the piston/connecting rods unloaded (no compression) while I'm waiting for the oil to get circulated through the crank since I had the oil pump off. Usually takes (5) 20 second cycles before I see the oil pressure start to register. That's just me though. The L plenum has to be off anyway with the type of engine support I use. I usually put new plugs in too since I had them out.
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