New Pistons and Liners - Alfa Romeo Bulletin Board & Forums

 
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post #1 of 5 (permalink) Old 09-18-2016, 05:36 AM Thread Starter
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New Pistons and Liners

Hello...I mentioned in another post here that will be embarking on renovating/restoring my daily driver 1750MKII after over decade of basically trouble free motoring. While i have everything off the car I was pondering what I should do with my engine. It has a little over 6000k on a fairly extensive rebuild. Pretty much everything was replaced other than timing chains and the original Pistons and Liners. When I did the engine work the Pistons seemed to be perfectly serviceable so I didn't replace them...maybe I should have for what they would have cost. I hate to pull things apart so soon after a comprehensive rebuild but maybe this is the time to do it. If so I wonder about putting in a set of Alfaholics forged HC P&Ls. And maybe do a proper port and polish...if I combined that with a new stainless steel exhaust I might have a pretty nice little engine...with a bit more hp. It already has new performance cams with the appropriate carb re-jetting. Everything else in the engine should be in good shape i would think new bearings,thrust washers,valves, guides, cam followers,seals,springs,serviced and balanced Crankshaft...I think it should be good in that end of things...maybe the valve springs could be replaced.

Lars

Last edited by LarsDSaboe; 09-18-2016 at 05:39 AM. Reason: added a few items i forgot
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post #2 of 5 (permalink) Old 09-18-2016, 10:21 AM
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If the engine shows that the pistons and liners are in good shape, I'd leave well alone.
I wouldn't tear it down just to do this if everything else is AOK, but it's your time and money and you can do exactly what you want.

Steve

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post #3 of 5 (permalink) Old 09-18-2016, 10:55 AM
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Originally Posted by GTA R View Post
I'd leave well alone. I wouldn't tear it down just to do this if everything else is AOK
That was my thought too. If the compression readings are consistent and in-range, why mess with it?

Jay Mackro
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post #4 of 5 (permalink) Old 09-19-2016, 02:20 AM Thread Starter
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Thanks guys...I kind of have the same feeling. Its not using oil excessively, good compression etc so Maybe I'll just leave it. I will be taking everything off the car though this winter to do body and paint work plus restoring (re-plating, coating, painting etc) all of the cars bits so its back to its lovely old self it. Mechanically I've replaced most everything on the car, so this winter is mostly cosmetic and some body and structural work. I will be sending the Cam cover to get polished so thats coming off anyway...Just thought while I have everything out.

L.
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post #5 of 5 (permalink) Old 09-28-2016, 08:46 AM
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I measure the top ring clearance as well as the piston diameter to determine whether to replace the pistons and liners.
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