Timing Belt

Tiny
SPENCEDOGG17
  • MEMBER
  • 2001 MAZDA MILLENIA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,700 MILES
I just recently purchased my car and it had 97,000 miles on it. I know Mazda says to replace the timing belt at 60,000 miles but I'm not sure if the belt has been replaced in my car, and the dealership did not know. In any event, I've decided to replace the timing belt just to be safe but I'm not sure what brand to buy. A mechanic I spoke with said to buy only Mazda parts but I have seen a lot of ads for Delco. Would you recommend buying only Mazda parts or can third party belts do the job?
Wednesday, September 17th, 2008 AT 12:19 AM

21 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

many work shops use and recommend after market parts parts, you can use these with confidence.

Here are the timing marks and how you do the job

https://www.2carpros.com/diagrams/mazda/millenia/2001

mark (mhpautos)
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Wednesday, September 17th, 2008 AT 1:31 AM
Tiny
KLETRUK
  • MEMBER
  • 1 POST
  • 1999 MAZDA MILLENIA
Where are the timing belt marks?
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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Hello

This guide will show you the engine camshaft timing belt marks

https://www.2carpros.com/diagrams/mazda/millenia/1999

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.


https://www.2carpros.com/forum/automotive_pictures/261618_Graphic_283.jpg



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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
MR76MUSTANG
  • MEMBER
  • 1 POST
  • 2000 MAZDA MILLENIA
Engine Mechanical problem
2000 Mazda Millenia 6 cyl Front Wheel Drive Automatic

what is the correct timing position  of the crankshaft , when setting the timing.
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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS


https://www.2carpros.com/forum/automotive_pictures/261618_Graphic_552.jpg

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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
LORIM321
  • MEMBER
  • 1 POST
  • 1998 MAZDA MILLENIA
1998 Mazda Millenia 6 cyl

I need the timing belt marks spec for my friends car. The only info he gave me was it's a 98 mazda 2.5L v6. Hopefully this is enough info.
Thanks guys
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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1998 Mazda Millenia V6-2.5L DOHC
Timing belt mark


https://www.2carpros.com/forum/automotive_pictures/12900_tbm2_1.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_tbm1_1.gif

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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 1998 MAZDA MILLENIA
  • 250,000 MILES
Everytime I crank the car I hear a rapid thumping sound coming from the belt or maybe the timing. It get faster when you press the gas and sometimes it will make a drag in acceleration. It has been doing it for about three months. The timing was done about 20,000 miles ago. Could it be the tensioner pulley or what might be the problem? It's the 2.5l V6 engine.
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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
3 months?

Did you have the repair place re check for the issue?

Noises are hard for us as we cannot hear it and your description is very vague at best.

Have someone at a shop listen to it to give you a direction.

Roy
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Wednesday, July 31st, 2019 AT 5:13 PM (Merged)
Tiny
DANL
  • MEMBER
  • 4 POSTS
  • 2001 MAZDA MILLENIA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 173,879 MILES
I have a 2001 mazda millena supercharged miller cycle engine is it a non interference engine
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
See below
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
DANL
  • MEMBER
  • 4 POSTS
Thanks for pic but im still wondering if my timing belt blew if I bent my valves or if it is a non interference engine meaning that even if the belt blew my pistons did not hit my valves and bend them
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
2.5 Liter -Its not an interference engine
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
DANL
  • MEMBER
  • 4 POSTS
Thank you much you have made my day so I can change timing belt and everything should be fine? Oh and one more thing can the chain jam up because motor will not crank over anymore and sounds like starter in engaging but will not crank motor over
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
LAKEWOOD
  • MEMBER
  • 12 POSTS
  • 2001 MAZDA MILLENIA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I am re-assembling a 2.5 after replacing headgaskets and I am uncertain of the proper order/procedure to install camshafts. The 2.5 Mazda 6 uses a friction gear arrangement that seems to make camshaft installing a trick. The service manual shows uses a screw driver to move the friction teeth but I am finding that I can not move them (I am concerned about applying any more force than I am). Am I missing something? Do I need to loose the nut on the end first? Could use some help from someone that has actually done it.
Thanks, Mark
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
LAKEWOOD
  • MEMBER
  • 12 POSTS
We actually found by pouring oil over the gear assembly it made the friction gear possible to move without such unreasonable force.
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Here are the installation procedures from our database.

Installation

1. Install camshaft gear, if removed. Apply oil onto camshaft journals, lobes and gears. Install camshafts so reference mark on intake camshaft gear and exhaust camshaft gear align. See Fig. 20. Using a screwdriver, adjust gear position so HLA's are not lifted by cam lobes.
Fig. 20: Installing Camshafts

2. Coat hydraulic lash adjuster, camshaft journals and camshaft journals cylinder head surfaces with engine oil. Install HLA into original location (if removed).

CAUTION:Install thrust caps first to prevent damage to camshaft.

CAUTION:DO NOT allow sealant to contact camshaft. Ensure camshaft remains horizontal when installing thrust caps or thrust clearance surface will be damaged.

NOTE: Thrust caps on right cylinder head are identified by numbers, with "5" at timing belt end of engine. Thrust caps on left cylinder head are identified by letters, with "B" at timing belt end of engine.

Fig. 21: Camshaft Thrust Cap Bolt Tightening Sequence
Fig. 22: Identifying Camshaft Bearing Sealant Application Areas

3. Install thrust caps onto cylinder head. Hand tighten cap bolts in sequence, using several steps, until caps are fully seated on cylinder head. See Fig. 21. Apply sealant at designated areas on cylinder head. See Fig. 22.

NOTE: Camshaft bearing caps on right cylinder head are identified by numbers, with No. 1 at timing belt end of engine. Camshaft bearing caps on left cylinder head are identified by letters, with "A" at timing belt end of engine.

4. Install remaining camshaft bearing caps (with bolts) loosely. Tighten camshaft bearing cap bolts in sequence to specification using several steps. See Fig. 41. DO NOT allow camshafts to bind.

5. Lubricate NEW camshaft oil seal and push in by hand. Using hammer and suitable diameter pipe, tap camshaft oil seal into cylinder head. Apply sealant onto NEW blind cap. Using soft-face hammer, tap blind cap into cylinder head.

6. Install coolant outlet. Tighten retaining bolts to specification. Install seal plate. Tighten retaining bolts to specification.

7. Hold camshaft from turning by using a wrench on camshaft hex. Install left and right camshaft pulleys as identified by "L" and "R" stamped on them. Ensure camshafts pulleys are installed so identification marks can be seen, and timing marks align with camshaft knock pins. Tighten camshaft pulley bolts to specification.

8. Before installing valve cover and gasket, apply sealant onto specified areas on cylinder head. See Fig. 9. Apply sealant onto valve cover, and install NEW gasket into valve cover. Install valve cover and gasket.

9. Install and tighten valve cover bolts in sequence to specification using several steps. See Fig. 43. To install remaining components, reverse removal procedure. Tighten all fasteners to specification. Fill and bleed cooling system.

10. Rotate crankshaft so No. 1 cylinder is at TDC on compression stroke. Ensure timing mark on crankshaft pulley aligns with TDC mark on timing belt cover. Coat distributor "O" ring and drive blade on distributor with engine oil. Align groove on distributor body drive blade. Install distributor and hold-down bolt.
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
LAKEWOOD
  • MEMBER
  • 12 POSTS
KH, Eventhough we figured it out before you had a chance to respond I do really appreciate how detailed your response was - you may wanted to highlight the importance of oiling the friction gears before trying to move them as that is what actually solved our problem. Thanks for a solid response - don't always get that.
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You're welcome and thank you for the input.

Glad to know everything is in order.

Happy New Year.
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)
Tiny
DIRTBURNR
  • MEMBER
  • 1 POST
  • 1999 MAZDA MILLENIA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
Would the breaking of a timing belt require a new engine? The belt apparently broke while it was parked and would not start.
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Wednesday, July 31st, 2019 AT 5:14 PM (Merged)

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