Jump to content
  • GUESTS

    If you want access to members only forums on HSO, you will gain access only when you Sign-in or Sign-Up .

    This box will disappear once you are signed in as a member. ?

trailblazer


Recommended Posts

No I never did anything. Maybe it's something different I'm thinking about, but when the engine was cold, it would "roar" for a few minutes but wasn't engine related, as the RPM's were stable.

But then again, it always had done it, if this is something that just started for you, I'd probably have it checked out.

Link to comment
Share on other sites

Some amount of "roar" is normal during warm up. If it is acting much differently than it always has in the past, its a pretty good indication that something is going wrong.

In addition to more technical ways, there are a few simple ways to check it. The simplest ways are obvious. When the engine is cold the fan should NOT spin free. when it is hot (after warming up) it should spin free. If the fan clutch is leaking it's bad or going bad.

If I recall correctly there was either a service bulletin, or a recall on the Trailblazer fan clutches, so its very possible that is the culprit.

Link to comment
Share on other sites

Wife's 2003 trailblazer when cold has a high rev sound as soon as you go about 2 miles it goes away any ideas. Thanks

Does it stop after a certain amount of time or will it always make the noise?

I'd vote for the noise coming from the clutch as well. There a few things to test before condemning them but they use to be pretty common to go bad.

Link to comment
Share on other sites

Is this an L6 or V8? The 6 cyl has a computer controlled fan clutch. There could be a problem with the wiring or the fan clutch itself. Is the check engine light on? If so, the codes could point you in the right direction. Simply spinning the fan will not give you a correct diagnosis.

Link to comment
Share on other sites

Sounds like the fan clutch to me also. I have a 2002 envoy with the I6. It has does it intermentatly for the last 3 years. I have never thrown a code for the the fan clutch and comes and goes with the roaring sound. If it starts to get real bad it will strugle during the summer in hot weather with the AC cooling also.

If you google trailvoy you will get a lot of info on the fan clutch and replacement options. Also other good info on the sight. Hope that helps.

Mike

Link to comment
Share on other sites

Join the conversation

You can post now ↓↓↓ or ask your question and then register. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.