Honda Car Forum

#11 (**permalink**) 23 Oct 2004, 09:52 pm

Caroline wrote:
>
> But nor can I tell if there are some interference engines whose valve
> design and timing are such that, even though it's interference, the
> damage is less likely.

It would depend on where the cam stopped rotating. If it stopped in a
position such that the valves were only half-way open then one might escape
valve damage.

Eric

#12 (**permalink**) 24 Oct 2004, 12:04 am

"Eric" <say.no@spam.now> wrote
> Caroline wrote:
> >
> > But nor can I tell if there are some interference engines whose valve
> > design and timing are such that, even though it's interference, the
> > damage is less likely.
>
> It would depend on where the cam stopped rotating. If it stopped in a
> position such that the valves were only half-way open then one might escape
> valve damage.

This is true of any interference engine, no?

Damage is never guaranteed when a TB on an interference engine breaks; it
depends on where the timing is when the belt breaks, engine RPM at the time of
breakage, etc.

I'm wondering whether there are certain designs of interference engines that, I
dunno, have a different valve angle or some other design feature that reduce the
likelihood of damage when the TB breaks.

#13 (**permalink**) 30 Oct 2004, 06:03 pm

"Caroline" <caroline10027remove@earthlink.net> wrote in message
news:sived.6431$ta5.5054@newsread3.news.atl.earthl ink.net...
> Gates.com says most Honda models from the 1970s to 2001 have interference
> engines, but not all. (It doesn't have info on 2002 to the present
> engines.)
>
> NOT interference, according to Gates:
> Civic 2001
> Passport 1994-2001
>
> http://www.gates.com/brochure.cfm?br...preset663Gates
> (open the pdf file listed near the bottom)
>
Gates can be wrong. It lists my 85 Volvo 765T (2.3L B230FT) as interference,
when it definitely isn't (even if fitted with an aftermarket cam).

Mike

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