Mazda

Mazda repair questions? Ask mechanics for answers ASAP

Ask an Expert,
Get an Answer ASAP!

My name is ***** ***** and I have a 1995 Miata with 210,000…

Customer Question
My name is *****...

My name is ***** ***** and I have a 1995 Miata with 210,000 miles on it.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

When the engine is cold (sitting overnight) it smokes very, very much until the engine warms up. I spent $1900. to have the valve seals replaced but it still smokes just as much. The cylinder compression is O.K.

Submitted: 2 years ago.Category: Mazda
Show More
Show Less
Ask Your Own Mazda Question
Answered in 11 hours by:
1/26/2016
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago
Ron
Ron, ASE Certified Technician
Category: Mazda
Satisfied Customers: 38,098
Experience: 35 years as a automotive tech
Verified

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

In most cases if the smoke clears up after running the engine then that usually means the valve stem seals are still leaking or you have bad rings on the pistons. If you pull the spark plugs are you finding them to be oil fouled? Post back and we can work from there.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
no-the plugs are not fouled
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

Okay then I would have them recheck the valve stem seals.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
how do you recheck the valve stem seals?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

I would start first with pulling the spark plug after it has sat over night before you run the engine and see if you have any signs of oil on them. It the seals are leaking there should be signs of oil on at least one side of them.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
if there are no signs of oil-then what----also, are the valve seals the same for both the intake and exhaust valves?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

The seals are the same on both valves and if there is no sign of oil on the spark plugs then your likely looking at worn piston rings which is highly likely with the amount of miles you have on the engine.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
a compression check was made and did not indicate low compression
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

Worn oil rings will not affect compression . There are 2 set of rings on each piston that control compression and one set of oil rings. It has to be either the valve stem seals or the piston rings. From your description it sure sounds like valve stem seals.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
If the valve stem seals are new, how can they be leaking?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

They can still leak if you have excessive play with the valve guides.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
Is there any way to test if the valve guides have excessive play---also, when the engine warms up, it stops emitting smoke.
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

The only way to test the valve stems and guides would be to pull the head and have a machine shop check them. The type of smoking you getting sure dose sound like the valves. In most cases if the rings where bad it would smoke all the time.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
Is it possible that the technician who installed the new valve stem seals did not install them correctly?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

It would be pretty hard to do but yes, its always a possibility.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
Do you have any advice as to what I should say to the shop that replaced the seals?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

Yea, I would be asking them why its still smoking just as bad as it was when they told you the seals where the cause . If they actually replaced them it should have stopped smoking it the valve guides are okay.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
Could the PCV or EGR valves be implicated in this problem?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

The PCV may bit its not likely, if it was stuck you would see smoke all the time. The EGR would have no role in it at all.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
If there is excessive play in the valve guides, would this problem be eliminated when the engine warmed up?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

No, not in most cases. Bad guides will actually cause the engine to run poorly as well.

Ask Your Own Mazda Question
Customer reply replied 2 years ago
Actually, the engine runs great---If the problem is with the oil rings, would adding a product like "Sea Foam" to the oil be of any benefit?
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

I do not think its a problem with the oil rings and sea foam would not work if it was. Are you 100% sure they replaced the valve steams?

Ask Your Own Mazda Question
Customer reply replied 2 years ago
They seem like honest people--but I have no way of knowing for sure---Grasping at straws, could the head bolts possibly have lost their tension and need to be re-torqued?
Customer reply replied 2 years ago
Note: They did not remove the head when they replaced the valve stem seals
Mazda Mechanic: ,  replied 2 years ago
Verified
Phone call session started
Mazda Mechanic: Ron, ASE Certified Technician replied 2 years ago

If the head was loose you would loose compression. The head dose not need to be removed to replace the seals.

Ask Your Own Mazda Question
Was this answer helpful?
Ask Ron Your Own Question
Ron
Ron
Ron, ASE Certified Technician
Category: Mazda
Satisfied Customers: 38,098
38,098 Satisfied Customers
Experience: 35 years as a automotive tech

Ron is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Drew

Drew

Super Mazda Tech.

2,188 satisfied customers

19 yrs. experience. Mazda Senior Certified Tech, with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

867 satisfied customers

16 years of experience

mazdamaster577

mazdamaster577

Master Technician

691 satisfied customers

mazda master/shop foreman for 15 years.

George H.

George H.

ASE Certified Technician

457 satisfied customers

15+Years

Ron Z.

Ron Z.

- Mazda Tech -

399 satisfied customers

18+yrs experience. State Inspector and Mazda Diagnostics

Mike Kelly

Mike Kelly

Mazda Mechanic

273 satisfied customers

17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.

Mazda Ed

Mazda Ed

ASE Certified Technician

264 satisfied customers

ASE Certified Mazda Master Technician

< Previous | Next >

Related Mazda Questions
We have a 2015 mazda small suv and the keyless entry is
we have a 2015 mazda small suv and the keyless entry is dead. my daughter says there is a key in the fob but I can't figure out how to access it. … read more
Mechanic01
Mechanic01
2,609 satisfied customers
My Mazda cx7 turbo has a code p0300 and it surges under
My Mazda cx7 turbo has a code p0300 and it surges under acceleration Not sure what's causing the code, runs well going down road at a steady speed.… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I just replaced rear rotors, pads and calipers on a 2000
I just replaced rear rotors, pads and calipers on a 2000 Mazda 626 Es , 2.5 liter non ABS brake car . Everything was working fine before i replaced stuff . front brakes still work fine . but i cant ge… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,295 satisfied customers
Black screen on NAV. only warning about looking before
black screen on NAV. only warning about looking before backing up shows. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I am very confused on tire sizing on my 2006 mazda 3 gt
Hi there! I am very confused on tire sizing on my 2006 mazda 3 gt sedan … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
2013 Mazda cx- 9 bleeding brakes changed master and booster
2013 Mazda cx- 9 bleeding brakes changed master and booster now it in limp mode and suggestions… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
It starts just fine. If you let it idle it dies when it
It starts just fine. If you let it idle it dies when it reaches operating temp on the gauge. About 10 mins. Then it will crank but won't start again till it gets back to cold. about at least an hour. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
867 satisfied customers
I think there might be a problem with the security system. I
I think there might be a problem with the security system. I put the key in band the dash lights up but it wont turn over. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
867 satisfied customers
I just had my engine diagnosed that oxygen sensor no
I just had my engine diagnosed that oxygen sensor no detection … read more
Mechanic01
Mechanic01
2,609 satisfied customers
P0401 code on 07 CX7. A couple times have flickering of
P0401 code on 07 CX7. A couple times have flickering of power off while driving. … read more
Ron Z.
Ron Z.
- Mazda Tech -
Vocational, Technical or Trade Scho
399 satisfied customers
I hear a very bad sound, also i have a code p0300. No I
Hi I hear a very bad sound , also i have a code p0300 … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
06 Mazda B4000 4.0l sohc Engine is pulled. Can I get the
06 Mazda B4000 4.0l sohc Engine is pulled. Can I get the procedure for R/R engine oil pump?… read more
Ron
Ron
ASE Certified Technician
38,098 satisfied customers
What if the rod doesnt move after a gravity bleed and then a
Hey Randal, what if the slave rod doesnt move after a gravity bleed and then a bleed? Please dont say master because ive replaced that bugger twice in 6 months… read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
My 2005 tribute's windows aren't working except for the
Hello! My 2005 tribute's windows aren't working except for the driver's side and the sun roof. No noise at all when pushing button and none of the doors buttons work either … read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
Mazda 6, 2010 odometer not working, speed meter not working.
Mazda 6, 2010 odometer not working, speed meter not working … read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
It started running rough and kind of jumping at a traffic
It started running rough and kind of jumping at a traffic light and the next day it cranked but would not start and after 4 times all the lights go on but nothing happens when you turn the key … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2010 mazda 3 with airbag light flashing 49. Can you
I have a 2010 mazda 3 with airbag light flashing 49. Can you please tell me what this code is for as well as are there possible easy fixes - Thanks … read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
Misfire code 300.& 301 I'm on hwy. Can I drive a few more
Misfire code 300.& 301 I'm on hwy. Can I drive a few more hours … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x