...just a guess - assuming you replaced the chain along with the guides, and
> the timing was set with the old, stretched chain, then I'd sure
double-check
the timing and then splurge for a new, oem thermostat while you're at it.
> I'm not a tech/mechanic.
>
> > I finally put my 1986 carburated Toyota PU back together after
> > replacing the timing chain guides, and, yes, I did spring for the
> > steel-backed ones. I notice however that after the engine warms up
> > that the needle on my temperature gauge creeps up almost to the upper
> > indicator for the normal range (not into the red zone), but settles
> > back to midrange after another 30-60 seconds of operation. I also seem
> > to get perceptible hesitations of the engine, very brief, while
> > driving, and I believe this is getting worse as the weeks go by. I'm
> > not losing coolant. Timing not quite right? Vacuum leak? Any
> > thoughts would be appreciated. Thanks.
> >
>
>