Asked by Aug 03, 2012 at 11:33 AM about the 2008 Chevrolet TrailBlazer LT1 4WD

Question type: Maintenance & Repair

5 Answers


If it follows engine speed it's probably a valve tap. This happens when you get wear in the valve train. Usually from a partially collapsed hydraulic lifter. Actually it's nothing to worry about. Just an annoyance. HTH. -Jim

5 of 5 people found this helpful.

You could try to put a small can of marvel mystery oil in your engine oil and run it for a complete oil change cycle. Should the hydraulic lifter be getting clogged up, this will slowly dissolve the carbon build up and restore it to full functionality. I would not advise just driving it till it breaks, it could cause engine damage. The marvel mystery oil can be purchased at any local parts store for around 3 to 4 bucks. This wonderful product will also clean your fuel system. Lucas brand also offers oil and fuel system treatments but I have use marval mystery oil for years.

2 of 2 people found this helpful.

Sea Foam brand additive stops the factory ticking that almost all Mazda's make. It is a cleaner and does something else that I can not explain, but my engine went from (needs a rebuild) to (sounds like a new engine). I don't add and drain, that is a waste of good oil. I just add 1/2 can and leave it in. It seems to evaporate out after about 2 months, then I add 1/4 can. No more tapping. I've been doing this for about 2 years. I was just about to sell it. It is a 1996 Mazda MVP 6 cyl., 125k

These motors accumulate air in the lifters and will produce lifter noise, THE FIX ! have engine at operating temp, start engine bring rpm up to 1500 rpms and hold there for 1-2 min. if noise still there increase rpm to 2000 for 1-2 min. this will remove the air and noise will stop. This motor in known for this issue and this is the fix 99% of the time.

to continue on the above answer. if noise has not went away increase the rpms to 3000 for 1-2 min. if still there? shut engine off wait 1 min. then start engine noise should be gone, if not then repeat the above. It may take a couple times to get all the air out. NOTE..... This procedure is for engines that were fine when last run and after sitting for 1 to? days when started sounded like lifter noise (ticking) to all out knocking. if this started when driving and engine running? I would consult a mechanic, or try the above first then mechanic.... I have done this many times in my shop, and have saved customers 1000s of dollars in unnecessary repairs . I would also say to check out a product called (Cerma Oil) as it will help to protect your engine.

Your Answer


Looking for a Used TrailBlazer in your area?

CarGurus has 4,548 nationwide TrailBlazer listings starting at $1,475.


Chevrolet TrailBlazer Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Tahoe
652 Great Deals out of 39,640 listings starting at $1,000
Used Jeep Grand Cherokee
908 Great Deals out of 70,944 listings starting at $950
Used GMC Envoy
53 Great Deals out of 2,125 listings starting at $1,500
Used Chevrolet Silverado 1500
2,112 Great Deals out of 167,048 listings starting at $1,900
Used Ford Explorer
855 Great Deals out of 64,021 listings starting at $1,000
Used Dodge Charger
444 Great Deals out of 27,990 listings starting at $1,979
Used Chevrolet Impala
515 Great Deals out of 34,209 listings starting at $950
Used Dodge Durango
288 Great Deals out of 21,536 listings starting at $2,495
Used Chevrolet Equinox
1,014 Great Deals out of 69,573 listings starting at $2,200
Used Chevrolet Traverse
673 Great Deals out of 34,742 listings starting at $2,700
Used GMC Yukon
414 Great Deals out of 21,570 listings starting at $1,495

Used Cars For Sale

2009 Chevrolet TrailBlazer LT1 4WD For Sale
57 listings starting at $5,450
2008 Chevrolet TrailBlazer LT1 4WD For Sale
7 Great Deals out of 201 listings starting at $2,600

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.