Amazon: - B20 Crankshaft

AmazonMatt · Jan 21st, 2016, 22:54

My B20 crank is going to have to be reground on the main bearings and possibly the big ends as well. The mains are currently at -20 and the big ends are currently at -30. Are larger sizes available? These are the largest I have been able to find.

Alternatively are new crankshafts available? Or am I looking at finding a good second hand crank?

Thanks
Matt

classicswede · Jan 21st, 2016, 22:56

I'm sure you can get + 50's

New cracks yes in stroker form but mega money. If you need a good used crank I will have some

AmazonMatt · Jan 22nd, 2016, 18:02

Have you got a link for +50 bearings?

Thankd
Matt

classicswede · Jan 22nd, 2016, 19:22

Had to call my dad to check what was on teh shelf. Biggest ones he could see there are +40 will that be big enough?

AmazonMatt · Jan 22nd, 2016, 19:58

I haven't measured yet but they might be enough, I will have a proper look tomorrow. Is that both Mains and Big ends that are available in +40?

classicswede · Jan 22nd, 2016, 22:53

Quote:

Originally Posted by AmazonMatt

I haven't measured yet but they might be enough, I will have a proper look tomorrow. Is that both Mains and Big ends that are available in +40?

Yes both available in +40

Clan · Jan 22nd, 2016, 22:13

Quote:

Originally Posted by AmazonMatt

My B20 crank is going to have to be reground on the main bearings and possibly the big ends as well. The mains are currently at -20 and the big ends are currently at -30. Are larger sizes available? These are the largest I have been able to find.

Alternatively are new crankshafts available? Or am I looking at finding a good second hand crank?

Thanks
Matt

These cranks have hardened journals so when reground the hard surface is ground off , Find a good used crankshaft they do last forever ! What is wrong with yours ?

AmazonMatt · Jan 22nd, 2016, 22:42

There is a raised bit in the middle of the journals where the oil hole runs.

Clan · Jan 23rd, 2016, 10:03

Quote:

Originally Posted by AmazonMatt

There is a raised bit in the middle of the journals where the oil hole runs.

get some 1200 grade wet dry abrasive paper and cut some 1 inch wide strips and one end in each hand rub the journals to polish them , see if you still have the raised bit, it is probably just carbon ..

The next step is to measure the journals with a micrometer ,

are they standard size shells ?

classicswede · Jan 23rd, 2016, 10:22

First post. The crank has already been ground and is on plus 30 shells

Jan 21st, 2016, 22:54	#1
AmazonMatt Junior Member Last Online: Oct 16th, 2023 22:20 Join Date: Feb 2015 Location: Devizes	B20 Crankshaft My B20 crank is going to have to be reground on the main bearings and possibly the big ends as well. The mains are currently at -20 and the big ends are currently at -30. Are larger sizes available? These are the largest I have been able to find. Alternatively are new crankshafts available? Or am I looking at finding a good second hand crank? Thanks Matt

Jan 21st, 2016, 22:56	#2
classicswede Trader Volvo in my veins Last Online: Today 11:10 Join Date: Dec 2004 Location: Anglesey	I'm sure you can get + 50's New cracks yes in stroker form but mega money. If you need a good used crank I will have some __________________ http://www.classicswede.org www.classicswede.co.uk

Jan 22nd, 2016, 19:22	#4
classicswede Trader Volvo in my veins Last Online: Today 11:10 Join Date: Dec 2004 Location: Anglesey	Had to call my dad to check what was on teh shelf. Biggest ones he could see there are +40 will that be big enough? __________________ http://www.classicswede.org www.classicswede.co.uk

Jan 23rd, 2016, 10:22	#10
classicswede Trader Volvo in my veins Last Online: Today 11:10 Join Date: Dec 2004 Location: Anglesey	First post. The crank has already been ground and is on plus 30 shells __________________ http://www.classicswede.org www.classicswede.co.uk

Jan 22nd, 2016, 18:02	#3
AmazonMatt Junior Member Last Online: Oct 16th, 2023 22:20 Join Date: Feb 2015 Location: Devizes	Have you got a link for +50 bearings? Thankd Matt

Jan 22nd, 2016, 19:58	#5
AmazonMatt Junior Member Last Online: Oct 16th, 2023 22:20 Join Date: Feb 2015 Location: Devizes	I haven't measured yet but they might be enough, I will have a proper look tomorrow. Is that both Mains and Big ends that are available in +40?

Jan 22nd, 2016, 22:42	#8
AmazonMatt Junior Member Last Online: Oct 16th, 2023 22:20 Join Date: Feb 2015 Location: Devizes	There is a raised bit in the middle of the journals where the oil hole runs.

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