Chap 05-105 is bloody confusing. It starts off by saying that engines should be repaired with the uprated head gaskets, the new washers, and the new bolts. But then it says to only replace the "older type bolt engines" with the older type bolts.

I can only guess to what has happened with your engine => I guess that the head was replaced at one point or other with an older head. The older bolts got carried over with the swap.

I can only assume that your block with the more modern engine number has the modification - if indeed the blocks were modified to accomodate the new bolts in some way - so you should be able to use the newer 12 point bolts and the new washers.

To be 100% sure I reckon you are best off asking whunter or mbdoc to be sure about this one.

I'm 95% sure it is OK - the chances of your engine number being faked are quite slim - no disrespect this is a W123 not a rare sports car once owned by Marvin Gaye...

...but if you think the engine number has been tampered with - post up a picture.


Get the correct tripple square socket for the new bolts if you decide to use them.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!