Author Topic: replacing main bearings  (Read 476 times)

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gents

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replacing main bearings
« on: December 31, 2017, 03:38:21 PM »
just about to rebuild a 33 1.5ltr boxer motor.with new rings and rod bearings, I was told not to replace mains if there is nothing wrong, just clocked 165000klm.no big end noise  when running some advice please as I have never built a alfa motor before??

bonno

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Re: replacing main bearings
« Reply #1 on: December 31, 2017, 06:43:37 PM »
Hi gents
I would at the very least check the condition of the big end bearing and crankshaft journal for wear, ie; both measurement - dial indicator (roundness) and visual (scoring & burning).
now
83 Alfetta GTV
05 156 JTS manual
past
00 156 selespeed
72 1750 GTV

sportiva

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Re: replacing main bearings
« Reply #2 on: December 31, 2017, 11:06:07 PM »
Replace the main bearings as well as the front and rear crank seals and you won't need to go back for another 165,000k's
3.0 GTV6 156JTS X2

75 2.5
2.0 Alfetta Sportiva #22
1.8 Alfetta
1.2 alfasud
2 75 parted out
15 alfettas parted
10 gtv parted
5 alfasuds parted

Car forums usually have more philosophers than practitioners

bonno

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Re: replacing main bearings
« Reply #3 on: January 01, 2018, 09:00:18 AM »
Hi gents
On re-assembly, you will need a Gasket Set Engine Overhaul kit that can be purchased through local AROCA club sponsor.
now
83 Alfetta GTV
05 156 JTS manual
past
00 156 selespeed
72 1750 GTV