Perkins 4.236 diesel engine - camshaft wear

the noise is most likely from worn hydraulic lifters rather than cam shaft
the key is your statement that the noise is worse when starting up
Cam shaft noise will be constant with rpms but lifter noise will decrease as the oil pressure builds up
At the klms you state , it is time for a hydraulic lifters set to be removed and have a leak down test done as they will be showing signs of wear
Find an accredited service shop that specializes in your make of car , have the noise properly diagnosed and get a quote for repairs

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88 Perkins. Engines workshop manual. 4.154. PRINTED lN U.S.A. .... removal, dismantling, assembly or refitting of a part is straightforward ... The ENGINE NUMBER is located on the cylinder ... starter motor, air cleaner, but without clutch. lb kg.

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A ticking noise in the cylinder head area is usually associated with the camshaft/followers, which may be worn.
Here's a couple if images: The lobe of the camshaft wears - becomes 'rounded'

The cam follower - what the camshaft pushes against to open and close the valves - can become worn.. 'dished' at the top.

It is unlikely you will have to change any valves, unless of course there is wear/damage.

The reason why the tick noise disappears when you are driving is because oil is getting pumped up to the camshaft area, between the cam lobe and the follower and acting as a 'cushion'.

A vehicle that has hydraulic lifters.. they control valve clearances by using oil. Like conventional cam followers, they can wear.

Changing your oil won't cure any wear. You could try using a valve train additive to try and quieten things down.




Hydraulic lifter:

I take it that the 'ticking' noise disappears shortly after the engine is started?
Can you identify where the ticking noise is coming from?

There are 2 noises associated with engine wear:
1. A rumble or 'knock' - maybe a 'tapping - ' noise from the bottom of the engine may indicate that the big end bearings are worn. The knock/tapping noise is caused by the worn big end bearings striking the crankshaft. The noise will often disappear after start up because of the oil finding its way into the space between the big end bearing and crankshaft. A rumble/knock/tapping from the bottom of the engine usually indicates a very major repair in the not too distant future..

2. A ticking noise from the top of the engine suggests a worn camshaft/cam followers or cam shells (bearings) .. usually a worn camshaft.

I'm not familiar with your model of vehicle (I'm in the UK). However, I would add that 'big end failure' isn't anywhere near as common as it was way back in the 70s. I would guess that your ticking noise has something to do with the camshaft. Any half-decent workshop would be able to diagnose the problem within a couple of minutes.

It's a relatively quick and easy job to change an overhead camshaft (I'm guessing your vehicle is overhead cam..). You may have to open your wallet and part with some of your hard earned dollars to join the 'replacement camshaft club' .. Worn camshafts aren't too uncommon.

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It depends on how noisy the lifters are. Your engine is a pushrod engine and there will be some noise. Generally is just a small ticking noise due to running clearance in the rocker arm bushings and such. The tappets (lifters) in your engine are hydraulic just like the tappets in a pushrod automobile engine. If your tappets are really making a noise, like a can of rocks, you might not have enough oil pressure or the roller on the end of the tappet that runs on the cam may be bad. If the tappet is the reason for the noise, the only thing you can do is replace them. If the roller on the end locks up, it will damage the cam lobe that it runs on as well meaning the cam will have to be replaced as well.

Good Luck
Steve

P0204 is miss fire detected on #4 cylinder.

Below is TSB from VW on your problem...a common one.


Technical Product Literature Transaction No.: 2015153/1
MIL ON, DTC P0087, P1093 or P2293 Stored in ECM Fault Memory Release date: Jun 29, 2007
Condition
15 07 04 June 29, 2007 2015153
MIL ON, DTC P0087, P1093 or P2293 Stored in ECM Fault Memory
MIL ON with the following DTCs may be stored in ECM fault memory:
DTC Description
P0087 Fuel Rail / System Pressure - Too Low
P1093 Fuel Trim 2, Bank 1 Malfunction
P2293 Fuel Pressure Regulator 2 Performance

Technical Background
Excessive wear of intake camshaft lobe that drives the high pressure fuel pump. The wear limits maximum pump piston lift, causing fuel rail pressure fluctuations.
The wear on the camshaft lobe can also lead to wear on the base of the high pressure fuel pump cam follower.
Production Solution
Increase surface hardening of camshaft lobe for the high pressure fuel pump
Improved intake camshafts have Part No. 06F109101B.
Service

• Remove the high pressure fuel pump and visually inspect:
1. Base surface of the cam follower -6- in contact with the camshaft lobe.
2. Tip of the high pressure fuel pump plunger.
3. High pressure fuel pump camshaft lobe.

If the base of the cam shaft follower looks like -C- or -D-, no excessive wear is present.
Cam follower and camshaft should not be replaced.
If the cam follower base surface is excessively worn so that its surface is concave -B- or missing -A-, inspect the intake cam shaft lobe for wear.



If the high pressure fuel pump camshaft lobe shows excessive wear, replace the intake camshaft with Part No. 06F109101B and the cam follower with Part No. 06D109309C, see Group 15 Engine - Cylinder head, Valvetrain in ElsaWeb.

Inspect the tip of the high pressure fuel pump plunger for excessive wear.
If excessive wear is found the high pressure pump must also be replaced, see Group 20 Fuel supply in ElsaWeb.
Tip:
High pressure fuel pump plunger damage is only possible if the cam follower base has a hole in it and the plunger tip has come in direct contact with the camshaft lobe.
If no excessive wear can be found in the high pressure fuel pump cam follower or intake camshaft lobe, or if the damage is found in camshafts with part number 06F 109 101 B, create a Technical Assistance Contact Ticket under the Concern Type Engine and Engine Electronics in ElsaWeb.
Attach the complete diagnostic log to the contact, and call the VW Technical Assistance Center for further assistance.

Warranty
When procedure applies to vehicles within the New Vehicle Limited Warranty, use the following:
Claim Type: W2
Part Identifier: 1505
Damage Code: 1505 18 _ _ _* 2
Labor Operation:
2.0T FSI engine Use applicable SRT time in ElsaWeb
Diagnostic Time: Actual GFF time expenditure
Claim Comment: Input "As per Technical Bulletin 2015153" in comment section of Warranty Claim.

* Code per warranty vendor code policy.
Required Parts and Tools
Description Part No: Quantity
Intake Cam Shaft 06F109101B 1
Cam Follower 06D109309C 1

No Special Tools required.

Pump