Karcher Pressure Washer Cylinder Head

Stock Number: ES538413

Manufactured by Karcher

In Stock Available for immediate despatch

Rated 4.8 out of 5 (89 customers)

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Karcher Pressure Washers


Pressure Washer Cylinder Head

If your Karcher isn't reaching high pressure, and you've noticed the trigger is "pulsing" this could mean you need to replace the cylinder head. The valves in the cylinder head can become blocked and clogged, reducing the tension needed to be able to use the washer to its full potential. 

  • Comes complete with piston seals

This is a genuine Karcher spare, suitable for select appliances in the model fit list.

Please note: For certain models the spare is serial and chassis number dependent. Please contact our call centre with this information so we can advise if the part will fit. Your chassis number will look like: 1.504-604.0, and the serial number will be 6 digits long.

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Product Reviews

Rated 4.8 out of 5 (89 customers)
Write a review
  • Leaking 301B

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    By - Croydon

    Found water coming out of the cylinder head after investigation found the piston rings were split. Purchased new piston seals, cylinder head seal and new cylinder head, cured the problem full pressure no leaks but be warned if your buying a new cylinder head it comes complete with all seals so I didn't need to purchase the piston seals nor cylinder head triangular seal so don't waste extra money like I did. Also if you pay next day delivery such as I did, and it's a Friday. You won't get it Saturday as I thought but Monday. Waste of that money
  • Good purchase

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    By - Somerset

    Bought this to repair Karcher 3.99 pressure washer which was not producing high pressure. Whilst it is fairly straightforward to fit, some DIY/mechanical knowledge and torx/allen keys are required. Keep the motor upright when undoing otherwise you will have all the oil over you! I fitted this in 20 mins and the pressure washer is back to running like new.
  • Pulsing Washer

    • 5.0 out of 5
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    By - Ross-on-Wye

    Very good service. The parts arrived within 24 hours. Had to order the cylinder head and the control head housing to solve the problem, but I now have what seems to be a new washer. This is not a task I would recommend to anyone who hasn't a degree of engineering knowledge. It is quite tricky in some places, but saved me the cost of a new pressure washer.

Ask & Answer

(23 Questions and 22 Answers) Ask a question
  • Q Ive lost oil changing a pressure washer cylinder head, how and what do I repace it with!i 3 Answers

    By Softy - Kent - 02 June 2011

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      Ref Colbee comment. We mistakenly stated that electric pressure washers do not contain oil. The link given to Stock Number: ES538165 is an oils approved for pressure washer pumps and is suitable.

      By Chris eSpares Staff - 20 June 2014

    • A
      Sorry, I'm a latecomer to this post, but I beg to differ with the response by staff-member Rory on 3/6/2011 who stated that an electric washer does not need oil; surely, in an electric washer, the swash plate chamber contains oil which is easily lost if the retaining bolts are loosened/removed and the motor is not kept upright.

      By colbee - Manchester - 19 June 2014

    • A
      Hi Softy, if you have a petrol pressure washer, the oil you need to use to keep the engine lubricated can be found here: http://www.espares.co.uk/parts?k=pressure+washer+oil. If you have an electric washer, you won't need oil.

      By Rory eSpares Staff - 03 June 2011

  • Q do i need a new cylinder head 2 Answers

    my pressure washer does not reach high pressure when trigger is pressed and pulses when not being used. is the problem the head, valves or a rubber seal?

    By tintin1 - doncaster - 24 August 2009

    • A

      By gtoj7lav - Scotland - 03 November 2009

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      The Head, was the problem on my pressure washer/karcher.High pressure back.

      By joe12345 - 29 October 2009

  • Q We need the bit that actually attaches to the cylinder head. 1 Answer

    The part that attaches to the cylinder head has burst due to frost damage. Is this bit available as a spare. At least our cylinder is much bigger than the bit in your image. Can you advise.

    By Gav - Ayrshire. - 24 December 2014

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      In order for us to answer your question or source the exact part you require please provide us with the following information: Appliance make, model and serial number of your appliance. For further help visit the "Finding Model Numbers" page on our website here: http://www.espares.co.uk/findingmodelnumbers. Alternatively please copy and paste this link into your web browser.

      By Chris eSpares Staff - 29 December 2014

  • Q I have a K4-600 PRESSURE WASHER used it once all was fine puy it away for a few months next time I came to use it it was leaking a lot of water and pulsating very badly, bear in mind this was used only once . i cannot see what is causing the problem. 1 Answer

    By len - 26 November 2014

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      It pulses because the high pressure that turns the motor off leaks away. unplug and remove the case. just connect the hoses and identify the area it is leaking. Replace that part to resolve your problem.

      By Chris eSpares Staff - 26 November 2014

  • Q symptoms are motor pulsing, low pressure, sounds like i need a cylinder head, but what else might cause same symptoms? 1 Answer

    K 3.575, not very old but ran briefly without water supply when hose fitting blew

    By richard - pl124er - 11 November 2014

    • A
      It is likely if the problem occurred immediately after running with no water that the seals of the pump have been damaged and this part should resolve your problem.

      By Chris eSpares Staff - 11 November 2014