That is correct.I have always heard that the ST1100 engine is an "interference" engine - and assumed that the valves could colide with the pistons. Is that only due to timing errors e.g., timing belt broken or too loose causing valves to open at the wrong time and colide with pistons?
Thank you, Brownie Man! That does seem to remove any urgency caused by overly tight valve clearances.That is correct.
Lets split a few hairs here, Ray. If your timing belt breaks or jumps a tooth because of a broken tensioner, the valves will open or remain open while the piston is rising in the cylinder. The piston does the colliding, and usually the result is a bent valve that will no longer close. Occasionally, the piston will get damaged, a valve will break off the stem, or you could even see a broken connecting rod. Any of these would tend to ruin your day. A non interference engine might have the valves off to the side - think tractors and inline engines. The valves are outside the combustion chamber (usually in the block next to the cylinder, not the cyl. head) and there is no way for the piston to reach out and touch the valves. You can also find lower performance (compression) engines with overhead valves and sufficient room atop the piston at TDC for the valves to open fully without contact.I have always heard that the ST1100 engine is an "interference" engine - and assumed that the valves could colide with the pistons. Is that only due to timing errors e.g., timing belt broken or too loose causing valves to open at the wrong time and colide with pistons?
yes, that is correctI have always heard that the ST1100 engine is an "interference" engine - and assumed that the valves could colide with the pistons. Is that only due to timing errors e.g., timing belt broken or too loose causing valves to open at the wrong time and colide with pistons?
Aren't they marked?The main hassle is putting a micrometer to each shim.
Yes.Aren't they marked?
That's nuts! I would never install unmarked shims.The aftermarket shims likely to be going in are not.
Well, zero. I did my '82 Nighthawk 750 decades ago.How many times do you want to remove and reinstall your cams?
So, are you saying that intake valve clearances tend to loosen (increase) over time?Once one is out, I normally take the opportunity to adjust all the intakes towards the tight side as close to each other as possible and all the exhaust on the loose side as close to each other as possible. It's not that much more work to do all compared to just one. The main hassle is putting a micrometer to each shim. See if your local Honda dealer will trade shims with you.