Fitting the Head
Entry posted by ACW
1,671 views
So the next job is to fit the head to the block. Start off by fitting the oil restrictor to the block. It is critical this this has the tapered hole towards the top to ensure that it will align up with the head regardless of the casing position.
Next the ARP studs are screwed into position. These need to be cleaned spotless with brake cleaner, and I use an airline to ensure no foreign bodies are in the block threads. Once this is done they are coated with ARP Ultra lube and screwed hand tight into the block. Using a straight edge you can check that they have all screwed into the same level in the block.
Next the head gasket and head can be fitted onto the studs. It is important to make sure the mating surfaces are spotless. After cleaning the ARP washers and nuts in brake cleaner the washers can be fitted onto the studs after applying ultra lube to both sides of the washers. The next stage is to fit the nuts after again applying ultralube to these.
The head can now be tightened down following the same procedure as the main bearing ladder. The technique is staring from the centre and working outwards to tighten initially to 25 lb-ft then to undo working out to in by 1/2 turn. Then back to 25 lb-ft starting centre to outside. Once this is complete they are done up to 60 lb-ft starting from centre to outside. Then undo 1/4 turn from outside back to centre. Then back up again to 60 lb-ft from centre to outside. This will ensure the threads are polished and the correct pressure is applied.
Once the head is fitted we can shim the valves next....
1 Comment
Recommended Comments