Can you check compression on an engine stand?

Chrisguilday · 05-12-2024, 07:55 AM

I blew up my N55 engine (wasn’t my fault, trans failed and forced the car into 2nd at 85 mph) anyway, I found a used N55 motor for a great price on FB marketplace. Says it has a new crank and new bearings, and he has photos and receipts for them. Says he’s selling it as he swapped a 2JZ into his car.

Can I safely jump the starter and do a compression test? I’m assuming the answer is obviously yes, but is there anything else I should be aware of or look out for?

noidex · 05-14-2024, 03:30 AM

It might move around and smack if it's on chains you but otherwise (without fuel and with oil) it should be absolutely fine. I couldn't think of anything that could go wrong tbh.

05-12-2024, 07:55 AM	#1
Chrisguilday Private 12 Rep 51 Posts Drives: 2011 E93 335i Join Date: Sep 2021 Location: Florida iTrader: (0)	Can you check compression on an engine stand? I blew up my N55 engine (wasn’t my fault, trans failed and forced the car into 2nd at 85 mph) anyway, I found a used N55 motor for a great price on FB marketplace. Says it has a new crank and new bearings, and he has photos and receipts for them. Says he’s selling it as he swapped a 2JZ into his car. Can I safely jump the starter and do a compression test? I’m assuming the answer is obviously yes, but is there anything else I should be aware of or look out for?
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05-14-2024, 03:30 AM	#2
noidex Private 12 Rep 56 Posts Drives: BMW 335i e93 N54 6MT Join Date: Apr 2024 Location: Bielefeld, NRW, Germany iTrader: (0)	It might move around and smack if it's on chains you but otherwise (without fuel and with oil) it should be absolutely fine. I couldn't think of anything that could go wrong tbh.
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