Originally Posted by
Roverlord off road spares
Whilst most Rover or other publications do not touch on this subject,
That is because for a largely standard engine being rebuilt with standard parts it is not necessary to measure preload.
I have rebuilt a 3.5 and built a 4.0 as a 4.6 following LR Overhaul Manuals LRL 0164 and LRL 0004 and it is not covered in there and I had no issues.
The only related points the manual raise is to ensure the right rocker pedestals go in the right place or oil flow will be blocked. The only other relevant commentary is to endure the tappets are immersed in oil before fitting and to pump them up to prime them with oil before fitting to reduce tappet noise on first start. The manual have a not that tappet noise may still be evident and to run the engine at 2500rpm for a few minutes until the noise stops.
So with a standard engine, with standard parts and correct installation it should not be needed.
With the 4.6 I built, the block had been damaged so was shaved down a bit to level it and the heads were on their second recondition so had been levelled twice and the engine went back together fine with no tappet noise and no issues.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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