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Valve springs unequal length
Posted: Sat Aug 18, 2018 5:16 pm
by southerly95
I have a spare unleaded 1098 Head which was damaged in store; one of the valves was bent and cracked the guide. In course or refurbishing it I find some of the springs are shorter by approx 1/8”. Is this within tolerances or should I replace them?
Re: Valve springs unequal length
Posted: Sat Aug 18, 2018 5:57 pm
by philthehill
The free length of the single valve spring (Pt No: AEA311) fitted to a 1098cc cylinder head should be 1.75".
If the valve springs do not conform to that length they should be replaced.
Try and obtain genuine Terry's valve springs Pt No: 451-458 as they are the best standard production springs.
Re: Valve springs unequal length
Posted: Sun Aug 19, 2018 6:03 pm
by southerly95
Thanks Phil will try to get Terrys, cheers, John