[lockedcollector]

Greeting,

A co-worker gave me his 2004 Rodeo with the 75k miles… pretty clean. He had the shop replace the timing belt as PM but something went wrong. The tech thinks it’s the oil pump but he says he does not have time to work on it. It runs but rattles like if it has no oil, doesn’t seem like it’s out of time but then again have no clue right now. I trailered it home today. It may be toast but have zero experience with Isuzu…..coming from Toyota space. I want to trouble shoot it but can’t find a repair manual or FSM. Anyone know where I can find one?

Thanks

 

[Shawn Anthony]

On this engine, the oil pump is internally driven by the crankshaft. If this noise is a new symptom it is not due to the oil pump. Must be related to the belt install. Perhaps the belt was replaced because someone thought this would stop the noise? Silly, but people do wired things.

With out hering the noise it's next to impossible to point you in the right direction. Simply because there are to many variables to consider. Possible sources for this sound are;

HPP
Rod
Wrist pin
Rocker arm
Rocker shaft
Tensioner
Cracked flexplate
Broken clutch component

The easiest way to go about pin pointing the source of the noise is to verify the engine has oil pressure. Next grab a long bar/pipe/socket extension and place it on your ear. Place the other end on & around the engine. The faulty part location will be found where the noise is the loudest.

 

[Karlvon]

You can get a Haynes manual online for rodeo-amigo-passport models. Amazon and ebay has them. I would ask the PM if the noise was there before the timing belt install. Good luck

 

[Buster28]

Only 2004 Rodeo and Axiom have a 3.5L GDI engine, it is unlikely a Haynes manual has any useful info about this engine or the Aisin AW30-40LS transmission used with this engine.
This is what you need, click on the link:

2004 Isuzu Axiom Factory Service & Electrical Troubleshooting Manual CD-ROM

2004 Isuzu Axiom Factory Service & Electrical Troubleshooting Manual CD-ROM

www.autorepairmanuals.biz

 

[lockedcollector]

Thank you all for the prompt response! The Rodeo was running great prior to the timing belt change, zero noise. I too believe it was an incorrect install. I will record the God awful noise when I get a chance.
More to come

 

[Buster28]

The 3.5L GDI engine is interference, so if the timing belt is not installed correctly the camshafts can get out of time and the pistons can hit the valves.

 

[lockedcollector]

On this engine, the oil pump is internally driven by the crankshaft. If this noise is a new symptom it is not due to the oil pump. Must be related to the belt install. Perhaps the belt was replaced because someone thought this would stop the noise? Silly, but people do wired things.

With out hering the noise it's next to impossible to point you in the right direction. Simply because there are to many variables to consider. Possible sources for this sound are;

HPP
Rod
Wrist pin
Rocker arm
Rocker shaft
Tensioner
Cracked flexplate
Broken clutch component

The easiest way to go about pin pointing the source of the noise is to verify the engine has oil pressure. Next grab a long bar/pipe/socket extension and place it on your ear. Place the other end on & around the engine. The faulty part location will be found where the noise is the loudest.

Any idea or thread on how to check the oil pressure on the 3.5L DI? Thanks

 

[lockedcollector]

The 3.5L GDI engine is interference, so if the timing belt is not installed correctly the camshafts can get out of time and the pistons can hit the valves.

Thanks, I understand. How long would it run if the pistons would hit the valves? The tech drove it in and out of his shop, I drove it on and off a trailer and into my garage ….besides the knocking (metal rattle) the engine doesn’t vibrate or misfire. I have no idea what to expect if the valves were to get bent. The tech says he’s done many timing belts and claims it went in correctly and thinks it’s the oil pump but of course I have my doubts.

 

[lockedcollector]

I took a video but cannot find out how to upload here

 

[Shawn Anthony]

Any idea or thread on how to check the oil pressure on the 3.5L DI? Thanks

If there is no gauge on the dashboard. You can connect a mechanical gauge to the oil filter head located at the lower front of the engine. On this filter head you will find a oil switch, and a couple ports extra ports to install a gauge or sensor into.

This V6 engines is a non interface engine. Broken timing belt or Improperly timed belt install will not damage the valves.

 

[lockedcollector]

If there is no gauge on the dashboard. You can connect a mechanical gauge to the oil filter head located at the lower front of the engine. On this filter head you will find a oil switch, and a couple ports extra ports to install a gauge or sensor into.

This V6 engines is a non interface engine. Broken timing belt or Improperly timed belt install will not damage the valves.

Thanks for the tips. However, now I have conflicting information. I thought the 2004 3.5L Direct Injection engine is an interference engine. How can this be confirmed.

 

[Buster28]

If there is no gauge on the dashboard. You can connect a mechanical gauge to the oil filter head located at the lower front of the engine. On this filter head you will find a oil switch, and a couple ports extra ports to install a gauge or sensor into.

This V6 engines is a non interface engine. Broken timing belt or Improperly timed belt install will not damage the valves.

Once again your posting incorrect information, the 3.5L GDI engine is an interference engine.

 

[Shawn Anthony]

information, the 3.5L GDI engine is an interference engine.

Yes I see, I made a mistake. The DI engine is a infact an interference engine.

 

[lockedcollector]

So can someone please guide me to see how I post a video of the Rodeo running? I guarantee it will sen shivers up your spine 😊

 

[Enemigo]

I always just upload to YouTube and then link on here.

 

[lockedcollector]

I always just upload to YouTube and then link on here.

Thanks!

Rodeo

youtube.com

 

[Shawn Anthony]

Thanks!

One thing I observed in the video is that the sound starts off really loud and after about a couple seconds, the sound changes tone and becomes quieter. This is not a normal symptom of a bearing or wrist pin.

Knowing what condition the engine oil is in might help narrow down what direction to begin troubleshooting. Is the oil clean? How about jet black and grainy?

Next step to take is to remove the plastic covers to access the top of the engine. Grab a long pry bar/pipe/socket extension or whatever. To use as a stethoscope. Place one end on your ear & place the other end on & around the top of the engine. Where the sound is the loudest is where you will find the issue. From this point it's simply a matter of getting inside the engine to inspect and troubleshoot.

 

[lockedcollector]

Nothing out of the ordinary but then again it’s been only run less than an hour total since the time belt change. I am going to check oil pressure once I get what I need (ie., guage).

 

[Sh_YVR]

Nothing out of the ordinary

that image got flagged as porn for me.

It has to be taken apart again - and tech these days are 'JR' - so my guess is he did it wrong started it up and heard 'bad sounds' then re-did it, didn't fix it completely so now he's just going to avoid talking about it.
with some luck re-do the job and hope it works again. (its 1 reason I do the absolute min of service since in my experience 60% of the time they do the job wrong even tho its easy to service) And many don't consult the proper service manual.

 

[mudoilngears]

that image got flagged as porn for me.

It has to be taken apart again - and tech these days are 'JR' - so my guess is he did it wrong started it up and heard 'bad sounds' then re-did it, didn't fix it completely so now he's just going to avoid talking about it.
with some luck re-do the job and hope it works again.

The image issue is fixed.