Wildcat 6.0 Litre
V8 Build photos
Wildcat Engineering 6.0 Litre block. Note the 6 off head bolt arrangement
Another view of bare block
Picture showing lifter bores with inserts fitted, these had a lot of bad burrs and swarf that took more time to sort out than I'd dare admit to......a real ball ache of a job !!
Bore checking, each bore was checked with a bore gauge. measurements taken at the top, middle and bottom of the bore.....measurements were also taken with an inside micrometer for good measure. The max variation measured was 0.0025"
Holes in block for back end oiling, Oil was also fed into the rear end of the oil galleries behind the flywheel to avoid oil starvation of the aft crank pins. These two holes had to be made for the pipes to pass through.
Fiting Crank into block.....Dial gauge used to measure endfloat on crank, centre main cap is fitted. Endfloat of 0.004" was measured, this is bottom end of range but will increase with wear so is ideal.
Checking Rod lateral clearances.
The rods require sufficient side clearance to allow oil to flow across the bearing which cools it, too small a gap and the bearings will overheat, too large and you will allow too much oil to flow which could lead to oil pressure problems.
On this engine the clearances were found to be too small and the rods had to be returned for re-machining...don't take it forgranted that things are always right..they arn't !!
Final check of bearing clearances using Plastigauge.
All crankpins and bearings were measured using external and internal micrometers and the clearances calculated, however, as a final check plastigauge was used. You cannot see the stuff on the above photo, it is like a thin strip of squashy string, how much it is squashed tells you how much clearance you have, very squashed = no clearance, the strip of paper i'm holding has the scale. approx 0.002" was recorded.
Then for each piston the height at the centre of the piston was measured. The variation across the 8 cylinders was 0.0025"
Checking the deck heights of the pistons. Firstly the dial gauge is zeroed on the block as shown.
As this dimension is also critical in the piston to cylinder head clearance, this was also measured using feeler gauges and a steel rule across the top of the block.
The height at the edge of the piston was also measured. Note be careful of piston rock when measuring here.
View of finished gaped ring......1 down 23 to go...
The gaps were checked using a feeler gauge. The gaps were carefully filed to achieve the gaps recommended by Childs and Albert.
A special tool was made to allow the rings to be easily reset in the bores.
Piston Ring Gaps, The piston ring gaps were set by careful filing in a vice, this involved carefully removing a small amount of material and then rechecking.