Compression test results
So I've been using a TON of oil (2 quarts in 500 miles!) on my newly acquired '81 S2. I'm running Mobil 1 20W-50 V-Twin oil, I switched from Mobil 1 10W-30 which the PO had been running. I live in Texas, and felt the heavier oil would do better in the heat.
I did a compression test today, long rod was disconnected from the bellcrank, wire from coil to the dizzy disconnected, engine was hot ~180 degrees, I pulled each plug when I tested each cylinder, but the others were in place - here are the results:
Cylinder 1 - 92 lbs DRY - 160 lbs WET
Cylinder 2 - 90 lbs DRY - 150 lbs WET
Cylinder 3 - 90 lbs DRY - 150 lbs WET
Cylinder 4 - 92 lbs DRY - 140 lbs WET
Looks like the rings are the culprit - can I really be losing that much oil with cracked rings? The car does not smoke, it is running a bit rich (plugs electrodes are black after about 1500 miles) What's the next step in zeroing in on the problem? Any other ideas?
Many thanks, as always,
'81 Spider (Weber's, Euro Bumpers, Custom Interior) Ivorio over Red | '54 Austin Healey 100-4, Bone Stock save for M cam, Carmine over Black.
Last edited by Crowbar44; 09-23-2018 at 02:27 PM.