How can I tell if my 2.25 has 3MB or 5MB?

Prague1996 · Jan 27, 2011

Only 3rd post...so still feeling my way....I have a 1980 LWB S3 2.25 petrol, how can I tell if it has 3 main bearings or 5? The engine# (taken from the cylinder head?) is LRC5899CA (although the 'L' could be an 'E' and the 1st 'C' could be an 'O'....haven't had a reply to my earlier posts so keeping my fingers crossed on this one!

oxides · Jan 27, 2011

Engine numbers are on the block, behind the water pump, under the manifold. 5brg start with 361 or 364. The 5brg engines usually have a blanking plate on the front drivers side and the oil filler cap on the rocker cover in front of the breather cap.

jamesmartin · Jan 28, 2011

if you look at block near sump you will see a ridge 2-3 inches up inline with dip stick hole if area between that and sump is flat its 3 brg if filled with cast cross pattern 5 brg

Prague1996 · Jan 30, 2011

Big thank you...thanks for spotting the school boy error....found the engine# looks like (S?) 3650014....the oil filler cap is on the rocker cover forward of the breather cap....so that makes it a 5MB?

jamesmartin · Jan 30, 2011

erc5899ca is metric cylinder head no also 3brg were buck egg blue 5 brg red

robert-ashton · Apr 4, 2011

want to find out for sure. Take the sump off.

How can I tell if my 2.25 has 3MB or 5MB?

Prague1996

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oxides

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jamesmartin

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Prague1996

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jamesmartin

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robert-ashton

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