M20K231 Overhaul recommendation

[N231BN]

22 hours ago, Bruce said:

Hi y'all,

Old thread, but title is right on topic.  I have a Continental TSIO-360-GB in my 231 and is up for overhaul.  Been casually checking prices and finding so far in the $50K range for a GB overhaul, and one shop gave me a price of $63K that included the LB conversion.  Questions....Is the LB conversion really worth the extra $13K?  Is $13K in the right ballpark for the GB/LB conversion?  I have read that the LB will provide cooler operation.  I have run my GB LOP and seldom do the temps ever get near 380.  Any other pros or cons?  Thanks.

Bruce

N231CH

 

13K sounds a little high, there's about 7-8k in parts needed. The bigger question is the status of your crankshaft and parts availability.

[Bruce]

On 3/2/2022 at 5:15 PM, 231LV said:

The LB upgrade is more desirable for a buyer and the LB definitely runs cooler. I saw around 40-60 degree drop across my cylinders going from the GB to LB. I ran the GB LOP and up high, I had to work to keep the hottest CHT below 380 degrees. The LB running LOP at the same altitudes see the hottest CHT running closer to 335 -340 degrees. On an earlier post, I commented that the overhaul after parts replacement worked out to the same price as Continental was asking for a reman...around $55k. At the end of the day, it's your call. My old GB was still running and had decent oil analysis but it was leaking oil and started having small "hiccups"  that required shop visits and planted small doubts in the back of my mind on whether I would trust the engine on longer flights.....Once I made my decision, it was "balls to the wall"!

Thanks for the quick reply guys. Don…Same shop quoted without LB and with LB. Still window shopping I will report back my findings in a week or so. 

Bruce N231CH

[Will.iam]

On 3/3/2022 at 6:58 PM, Bruce said:

Thanks for the quick reply guys. Don…Same shop quoted without LB and with LB. Still window shopping I will report back my findings in a week or so. 

Bruce N231CH

Did you check jewel aviation? A few people here have had good reports of their service.  @gsxrpilot did his engine there and converted it from a TSIO-360 MB to a TSIO-360 SB. But I have not seen Paul on this forum for a few months now.