Замена гидротолкателей клапанов в двигателе AFB 2, как произвести замену

[Соломас]

Кто даст граммотную консультацию по замене гидротолкателей клапанов в двигателе AFB 2.5 ТДИ???

 

[AVR]

Servicing valve mechanism
Removing and installing camshafts



Special tools, workshop equipment, test and measuring appliances and auxiliary items required
• ◆ V.A.G 1331 Torque wrench (5...50 Nm)
• ◆ 3242 Clamping bolt
• ◆ 3458 Camshaft setting bars
Removing



• ‒ Remove toothed belts from camshaft sprockets => Page 13-37.
• ‒ Remove cylinder head covers left => Page 15-20.
• ‒ → Pull off rear middle toothed belt guard -2- upwards.
• ‒ Remove bolts -arrows- and take off rear left -3- and right -4- toothed belt guards.



• ‒ → Remove retainers of concerned injectors and pull out injectors upwards.
• ‒ Mark fitting position of rocker fingers with coloured pen.
• ‒ Unbolt camshaft bearing caps and remove camshafts.
Note:
When removing camshaft, pay attention to rocker fingers and guides.



Installing
• ● Lock crankshaft with clamping bolt 3242.
• ‒ → Remove threaded stud -arrow- in front of locking slot of exhaust camshaft.
• ‒ Insert axial bearing washers.
• ‒ Insert rocker finger guides and rocker fingers.



Notes:
• ◆ Note the marked fitting position of rocker fingers.
• ◆ If needed, use a little grease to help fit rocker fingers.
• ‒ → Install inlet camshaft so that the setting bar 3458 can be inserted.



• ‒ → Be careful to align centred. Before installing camshaft, set bearing caps on and determine fitting positions.



• ‒ → Tighten bearing caps 1 and 5 to 10 Nm.
Note:
Note the numbering on the bearing caps.



• ‒ → Install outlet camshaft so that the setting bar 3458 can be inserted.
• ‒ Tighten bearing caps 0 and 4 to 10 Nm.
• ‒ Check adjustment again using camshaft setting bar 3458.
• ‒ Check fitting position of rocker fingers and guides.



• ‒ → Lightly coat hatched surfaces of front and rear inlet camshaft bearing caps with sealant "D 454 300 A2" and tighten bearing caps to 51 Nm.
• ‒ Do not coat inner surfaces -arrows- with sealant.
• ‒ Tighten remaining bearing caps to 10 Nm.
• ‒ Install threaded stud.
The rest of the assembly is basically a reverse of the dismantling sequence.
Note:
Always renew copper seals and O rings between cylinder head and injectors.
• ‒ Make sure that injectors are properly seated.
• ‒ Install retainers and tighten to 10 Nm.
• ‒ Place toothed belt on camshaft sprockets => Page 13-37.
• ‒ Install cylinder head covers left => Page 15-20.
Notes:
• ◆ After camshaft is installed, the engine must not be started for approx. 30 minutes. Hydraulic compensation elements must settle (otherwise valves will strike pistons).
• ◆ After working on valve mechanism, carefully turn engine by hand at least 2 complete revolutions to ensure that no valve strikes piston when engine is started.

Servicing valve mechanism
Checking hydraulic compensation elements
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
• ◆ Feeler gauge
• ◆ Wood or plastic wedge
Notes:
• ◆ Hydraulic compensation elements cannot be serviced.
• ◆ Irregular valve noises when starting engine are normal.
Test sequence
• ‒ Start engine and run until the radiator fan has switched on once.
• ‒ Increase engine speed to about 2500 rpm for approx. 2 minutes.
Note:
If irregular valve noises disappear during starting but recur during short trips, the oil check valve must be replaced. Fitting position of oil check valve: Under oil filter => Page 17-33.
If the hydraulic compensation elements are still noisy, determine the defective element as follows:
• ‒ Remove cylinder head covers left => Page 15-20.
• ‒ Rotate crankshaft clockwise, until cam of the hydraulic element to be checked is pointing upwards.
• ‒ Determine play between cam and rocker finger.
• ‒ Use a wood or plastic wedge to press down rocker finger. If play develops between cam and rocker finger, the hydraulic compensation element needs to be replaced.
Notes:
• ◆ After camshaft is installed, the engine must not be started for approx. 30 minutes. Hydraulic compensation elements must settle (otherwise valves will strike pistons).
• ◆ After working on valve mechanism, carefully turn engine by hand at least 2 complete revolutions to ensure that no valve strikes piston when engine is started.

Servicing valve mechanism
Check axial clearance of camshafts



Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
• ◆ Universal dial gauge bracket VW 387
• ◆ Dial gauge
Perform check with rocker fingers removed and first and last bearing caps fitted.



• ‒ Bolt universal dial gauge bracket VW 387 with dial gauge to cylinder head:
→ Inlet camshaft



→ Exhaust camshaft
Wear limit: max. 0.30 mm

 

[AVR]

Жаль, но я не смог вставить картинки, с ними все понятней. Если кто-нибудь подскажет, как вставить текст с картинками, отправлю более полную форму текста.

 

[Соломас]

Спасибо,конечно,что постарались ответить, но хотелось бы получить информацию на русском ,и желательно, со схематичными рисунками.Буду благодарен, если кто- нибудь откликнется.Замену хочу произвести сам,не обращаясь в сервис.

 

[Tappet]

Спасибо,конечно,что постарались ответить, но хотелось бы получить информацию на русском ,и желательно, со схематичными рисунками.Буду благодарен, если кто- нибудь откликнется.Замену хочу произвести сам,не обращаясь в сервис.

как правило одни компенсаторы не выходят со строя,в идеале надо снимать головки