I cannot get the belt tensioner off, have removed all bolts but still wont budge???

Dan writes
Daniel Cleaveland Nov 03, 2022

What happened here?
I am currently trying to remove star bolt holding tensioner on, it is not budging. I'm guessing from this post I will not get an answer anytime soon.

The T45 fit, then T50, I am going to go find a T55 and T60 I suppose.

I am definitely wondering if I am doing something wrong with this one bolt holding me back from 4 more to replace water pump.
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It all depends on whether anyone sees questions and if anyone is qualified to answer or wants to try. I try most. Did you consider the bolt might be a left hand thread? Look at the normal rotation, this should tighten the bolt not undo it.

There is a video but it looks too short.

https://www.google.com/search?q=1994+Mazda+B3000+Removing+a+belt+tensioner

..

2 bolts below and 1 above attached to the belt tensioner!

timing belt? on a Jeep? 05 wrangler
what engine is this>?
ah the 2.4L
front cover

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove the crankshaft vibration damper.
3. Remove the generator drive belt tensioner assembly.
4. Remove the timing belt front cover bolts, and remove the covers.

rear cover

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove the front covers.
3. Remove the timing belt.
4. Hold the camshaft sprocket with Special Tool 6847, or equivalent, while removing the center bolt.
5. Remove the timing belt idler pulley.
6. Remove the rear cover fasteners and remove the cover from engine.

give it a sharp tap with a hammer,poss rust has bonded the two bits together.

Timing Belt Removal & Installation SOHC To Remove:

1. Disconnect battery negative cable.
2. Remove fresh air duct.
3. Drain engine coolant into an appropriate container and retighten radiator drain plug.
4. Remove upper radiator hose.
5. Remove fan clutch assembly bolts.
6. Remove 5 cooling fan shroud bolts.
7. Remove fan shroud and fan as an assembly.
8. Loosen alternator mounting bolts and remove drive belt from pulley.
9. Remove fan pulley.
10. Remove 4 cooling fan assembly bolts.
11. Remove cooling fan assembly.
12. Remove 4 bolts and upper timing belt cover.
13. Remove 2 lower bolts and lower timing belt cover.
14. Loosen adjusting bolt and remove A/C belt.
15. Remove alternator belt.
16. Loosen power steering pump lock bolt and mounting bolt.
17. Remove drive belt from crankshaft damper. Camshaft timing marks
    
    
18. Turn crankshaft until timing mark on front housing and the arrow "2" on the camshaft pulley align.
19. Remove 5 bolts and remove damper.
20. Remove timing belt guide from timing belt pulley.
21. Loosen tensioner lock bolt.
22. Pry tensioner away from timing belt and tighten lock bolt to relieve tension on the timing belt. NOTE: Mark the direction of timing belt rotation on the belt if it is being reused.
    
23. Remove timing belt.

To Install:
Timing belt pulley timing marks

NOTE: Timing belt pulley timing mark and timing mark must be aligned.
Camshaft timing marks

NOTE: The arrow at "2" on camshaft pulley must be aligned with timing mark on front housing.
Timing belt installation

1. Install timing belt with minimal slack from timing belt pulley to water pump and from water pump to camshaft pulley.
2. Loosen tensioner lock bolt until tension is applied to timing belt. CAUTION
   Do not turn crankshaft counterclockwise.
   
3. Turn crankshaft pulley 2 full turns clockwise and ensure timing marks are properly aligned.
4. Tighten tensioner lock bolt to 33 ft lb (45 Nm).
5. Apply a force of 21 lb to timing belt midway between idler pulley and camshaft pulley.
   • Deflection should measure 0.43-0.51 inch (11-13 mm)
   NOTE: if timing belt deflection is incorrect remove timing belt and install NEW tensioner spring.
   
6. Install timing belt guide.
7. Install crankshaft damper pulley.
8. Install 5 crankshaft damper pulley bolts. Tighten bolts to 132 in lb (15 Nm).
9. Install power steering pump drive belt.
10. Adjust power steering pump drive belt tension and tighten lock bolt and mounting bolt.
11. Install alternator drive belt.
12. Install A/C drive belt.
13. Install lower timing belt cover and bolts. Tighten bolts to 84 in lb (10 Nm).
14. Install upper timing belt cover and bolts. Tighten bolts to 84 in lb (10 Nm).
15. Install cooling fan assembly and 4 bolts. Tighten bolts to 27 ft lb (37 Nm).
16. Install fan pulley.
17. Install fan clutch and shroud as an assembly. Tighten bolts to 74 in lb (8 Nm).
18. Tighten 4 cooling fan nuts to 16 ft lb (22 Nm).
19. Adjust alternator belt tension and tighten alternator mounting bolts.
20. Install upper radiator hose.
21. Install fresh air duct.
22. Connect battery negative cable.
23. Refill/bleed cooling system.

DOHC To Remove:

1. Disconnect battery negative cable.
2. Remove fresh air duct.
3. Remove 5 cooling fan shroud bolts and 4 thermo-modulated fan nuts.
4. Remove 4 thermo-modulated fan shroud fasteners.
5. Remove generator drive belt.
6. Remove fan pulley (located above crankshaft pulley).
7. Remove 4 bolts and splash shield (located under front of vehicle).
8. Remove A/C drive belt and power steering drive belt. Timing Belt Removal
   
   
9. Remove 5 bolts and upper timing belt cover.
10. Remove 2 bolts and lower timing belt cover.
11. Loosen tensioner lock bolt and pivot tensioner pulley outboard.
12. Retighten tensioner lock bolt. NOTE: Mark timing belt for rotation if it is being reused.
    
13. Remove timing belt.

To Install:
Crankshaft match marks

1. Align marks on timing belt pulley and pump body. Camshaft pulley alignment marks
   
   
2. Align marks on camshaft pulleys with alignment marks on seal plate.
3. Install timing belt. NOTE: No looseness should exist on the tension side and at the camshaft pulleys.
   
4. Loosen tensioner lock bolt.
5. Turn crankshaft 2 revolutions in direction of rotation and check that timing marks are still in alignment.
6. Tighten timing belt tension lock bolt to 27-38 ft lb (32-52 Nm).
7. Apply a force of 22 lbs to timing belt between camshaft sprockets.
   • Belt deflection should measure 0.30-0.33 in (7.5-8.5 mm)
   NOTE: Replace tensioner spring if timing belt deflection is excessive.
   Timing Belt Installation
   
   
8. Install lower timing belt cover.
9. Install upper timing belt cover.
10. Install power steering drive belt and adjust belt tension.
11. Install fan pulley.
12. Install generator drive belt and adjust belt tension.
13. Install A/C drive belt and adjust belt tension.
14. Install splash guard.
15. Install fan and fan shroud.
16. Install 4 fan bolts. Tighten to 24 ft lb (33 Nm).
17. Install fan shroud mounting bolts.
18. Install fresh air duct.
19. Connect hose to resonance chamber.
20. Connect battery negative cable.

to get good leverage use a serpentine belt removal tool. the bolt should be on the base.

You have to remove the belt.Also you can have it tested on the vehicle.Once you have the 2 bolts off and the belt the alternator should come off.Good luck.

Maza's auto-tensioner should have a to where you bolt the tensioner on (if it was removed) and it will have to where when you pull on the pulley potion toward the front it unlock into one of two positions...one of them will work to give enough slack to put the belt on and then it will click/flip back into the other position to provide tension. I hate the auto-tensioner but sometimes its handy.

Disconnect battery earth lead. Do not turn crankshaft or camshaft whn timing beld removed. Remove spark plugs to ease turning engine. Turn engine in normal direction of rotation (unless otherwise stated) Do not turn engine via camshaft or other sprockets. Observe all tightening torques. Remove engine, remve RH engine mounting. Remove auxiliary drive belts, water pump pulley, crankshaft pulley, timing belt upper cover, timing belt lower cover. Turn crankshaft clockwise to TDC on No. 1 cylinder, slacken tensioner bolts 5 & 6. Move tensioner away from belt and lightly tighten bolts. Remove timing belt. Remove water pump and replace with new one. Suggest to replace cambelt as well.
Installation
Ensure timing marks aligned3 & 4. Fit timing belt in anti-clockwise direction, standing at crankshaft sprocket. Ensure belt is taut between sprockets on non-tensioned side. Slacken tensioner bolt 5. slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner bolt 6. Tighten tensioner bolt 5. Turn crankshaft on turn clockwise. Ensure crankshaft sprocket timing marks aligned 4.
Slacken tensioner bolt 5. Slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner 6. Tighten torque: 20 - 26 Nm. Tighten tensioner bolt 5. tighten torque: 20 - 26 Nm. Apply thumb pressure to belt at middle. Approximately 5kg. Belt should deflect to 1/4 of tensioner bolt head width 7. Belt tention can also be set using burroghs (BT-33-73F) tension gauge 10 at middle. Turn crankshaft 90 ° anti clockwise. Check belt tension is 9.5 16,5kg (engine must be cold). Install components in reverse order of removal. Fit cranckshaft pully. Tighten crankshaft pully bolts 8. G4-J: Tightening torque: 12-15Nm.
G4-N/G4-k: Tightening torque: 10-12Nm
G4EA: Tighten crankshaft pully bolt 9. Tighten torque: 140-150Nm.

Loosen the tensioner pulley adjusting bolt under the power steering pump.