Are 4ac's a free spinning engine?

[Gunna]

Hi all,

Just trying to find out if they are or not. Any help would be great thanks!

Cheers, Craig...

[too_quick]

Yes, Ive taken timing belts off and spun the crank around no damage or touching what so ever.

[Gunna]

Thanks mate + rep

[Grega]

....think what you mean is non interference mate, and, yes, its non interference.

[Norbie]

All belt-driven Toyota engines are non-interference.

[4AGTE_TA22]

all belt driven toyota petrol engines are non interference

Cheers
Dave

[AAAAGZE]

while they might be "free spinning" they're not really free revving.. my stockie would only get about 7100 before valve bounce

[hosking1991]

while they might be "free spinning" they're not really free revving.. my stockie would only get about 7100 before valve bounce

thats not bad for the 4ac they have tiny ports, one cam and are non crossflow. my old man had my sisters ae82 up to 90 ks in 2nd it had no tacho so who knows waht rpm it was on

[af300e]

All belt-driven Toyota engines are non-interference.

Not sure about the beams on that one.

[TooF]

all belt driven toyota petrol engines are non interference

Cheers
Dave

very true some of the diesels are *very* interfernce.

[cambelt]

VVti 2JZ is a interference
Dave

[CrUZida]

Pretty much all VVTi engines are interference, as is the 5VZ (not sure about the rest of the VZ's).

From about the mid 90's onwards MANY toyota belt driven engines became interference.

[sbyder]

Norbie got shut-down

[Sam_Q]

I have some serious doubts about the 20V blacktop engines being non interference also, I will check soon.