do i have a interfarence engine {95.5 3.2 passport}

i have a 95.5 3.2 passport engine is it a interfarence engine

nope it is not interf. engine

what makes a engine a interference engine or not

On some engines if the the timing belt breaks the valves and pistons will hit each other and cause major damage.

On some engines if the the timing belt breaks the valves and pistons will hit each other and cause major damage.

So, which engine will cause piston/valve damage.

2.2L GM engine in the Rodeo.

If you have the 3.2L, it is an interference engine.

i have a 95.5 3.2 passport engine is it a interfarence engine

An interference engine has that problem because the valves can interfere with piston travel if the timing belt breaks. My problem! I'm hoping there is no damage.

So, which engine will cause piston/valve damage.

If you have the 3.2L, it is an interference engine.



There is alot of literature out there claiming that the 3.2L is an interference engine, but its not true. There are many people on this board with first hand knowledge that it is non-interference. So, no worries! :icon16:

Isuzu does state that the 3.2L engine is an interference engine however I have been inside hundreds of these things I have even gone as far as pulling the t-belt off of my own 3.2L and spinning it over with the starter no damage incurred
I have never heard of one of these having a problem with pistons hitting valves
oh and by the way the heads on my Trooper have been machined twice which means the valves are closer to the pistons than yours are

the heads on my Trooper have been machined twice which means the valves are closer to the pistons than yours are

Interesting.

Why have the heads on your Trooper been machined?

Were they warped?

Just wondering...


Dale

Interesting.

Why have the heads on your Trooper been machined?

Were they warped?

Just wondering...


Dale


HiPo TROOPER BAY-BEE!! http://67-72chevytrucks.com/vboard/images/smilies/burnout.gif

If you have the 3.2L, it is an interference engine.
I beg to differ with you my friend, I have a factory service manual and also an Isuzu Factory Engine tech training manual for the 98+ 3.2 V6. Here is a piece from the book. "The angle of the exhaust seat has also been changed;relocated in the direction of the intake valve,this feature helps increase the clearance in-between the intake and exhaust valves.This feature enables the engine to "Free Wheel" in the event of a timing belt failure. So that is fact that the 98 and on 3.2 L V6 (6VD1-W) is definately non-interference.

non-interference....

a quick search of the forum with show you that...

Now I am a bit confused - Is my 1995 3.2 built Oct 94 interference or not?

No need to be confused. ALL isuzu 3.2/3.5's (1993-2004) are non-interference. Just the way they should be! :grinyes:

Joel

No need to be confused. ALL isuzu 3.2/3.5's (1993-2004) are non-interference. Just the way they should be! :grinyes:

Joel Just noticed your reply - thanks very much for the definitive answer.

I am a little confused also. I have a 1995, not 95.5, but, I just did my timing belt job and did not line up the marks before tackling the job. Got all confused and had to move crankshaft and cams independent of each other... I figured that if the valves hit the pistons I would not be able to turn the camshaft. Either I got lucky or it is not interference, or what I call zero tolerance. In my case I deemed it not zero tolerence.. Then I read on another site that some people had blown timing belts with 1995's and bent their valves....? Maybe at slow speeds your ok, but if going high speeds the piston hits the valves??? As a teenager I used to blow timing chains in Honda 100-125s, always bent the valves.....

Some manuals are incorrect in calling the 1993+ isuzu 3.2/3.5 interference as they are not. I've never heard of one smashing, even at speed, in ~5yrs of hanging around these boards.

Joel

I have a 10-94 Isuzu Rodeo. It is an interference engine, I can tell you first hand because my valves got bent last Saturday...

Re-did timing belt, idlers and tensioner. It ran for about 10 minutes, then I gather one cam spun on the belt "Whack". A few minutes later the other camshaft spun on the belt "Whack, Whack, Whack... I no longer have straight valves........

I took the timing belt covers off expecting to find a ripped up belt. Nothing looked wrong, tension was good.

The only think I could think was that I was off 1 tooth on the belt? Maybe the pressure was still in the cylinder and the valve opening was a bit delayed, causing the need for a greater force to open the valves?

Oh well, I am a little depressed right now.

I hope this note is up to Canuckleheads standards.....:crying:

Anybody have a reasonably priced Rodeo Engine for sale.....?

Wow, just found this information:

http://consumeraffairs.com/automotive/isuzu_timing_belt.html

I was about to buy another rodeo this weekend, I am re-thinking this. I guess I can consider myself lucky with 208000 miles.

could it be that only some castings are interference and others are normal? i'd like to know the answer to this on going question.

although--it would be a great excuse to drop a 4.3 GM engine in the passport....

I have a 10-94 Isuzu Rodeo. It is an interference engine, I can tell you first hand because my valves got bent last Saturday....

This is the first in ~5yrs I've ever heard. Are you sure the cylinder heads havent been shaved/trued at some point? I've seen many posts of broken on the fly T-belts and wrong valve timing on 1993-2000+ 3.2's and no reports at all of smashing.

Joel

I just bought a new car... So, I don't have the urgency to get the Rodeo repaired imediately. I am going to take the cylinder heads off and have a look in my spare time. I have started, and boy this engine is complex... I remember how easy working on my 68 Chevelle 6 cylinder was....

My belief is that the problem is camshaft bearing wear. I believe when I put the new belt and tensioner in the belt became tight and caused the worn bearings to freeze.....

I will post my findings when the heads come off.