Reply To: Overheating Traction 11B

[BernieParticipant]

Larry and Rich,

‘Fraid not.

Workshop manual operation 103.25(d) says…

Use only Hugo-Reinz joints stocked by our Spare Parts Department. Choose joints of a thickness that willl MAKE BARREL FACES STAND ABOVE UPPER CRANKCASE FACE BY 0.05 to 0.10 mm.

BEFORE TIGHTENING. Carefully measure the heights of barrel faces above crankcase face by the use of instrument MR.3377. Place the barrels together in pairs, give H-R joints a thin coating of linseed oil end place them on barrels. Place barrels in pairs in cylinder block.

The barrels must go into position under their own weight and without hindrance from barrel joint.

The Reinz gaskets referred to were a woven wire reinforced material with graphite coated soft facings and were considerably thicker than the modern “paper” replacements.  They were cut in pairs, like spectacles, hence the instruction to fit the barrels in pairs. The paper gaskets were introduced with the “D” engine in the mid 50’s and, since the ‘60s, are the only parts available.

New liners do partially take the reduced gasket thickness into account but it is still essential to ensure correct stand-off, especially if other work (such as block surface skimming) may have been done to the hardware.

As modern head gaskets no longer contain asbestos they tend to be less conforming so I recommend aiming for the top end of the stated stand-off range to ensure the necessary clamp load is achieved around the bores.

In 2017, when Phil and I rebuilt our two 6s, we had both block surfaces skimmed with new liners securely fitted in place but without any gaskets under them.  We then knew there was zero stand-off and subsequently fitted 0.10mm thick gaskets to achieve the correct final assembly height – easier than faffing about measuring heights with MR.3377 (and probably far more accurate!).

B…