Triumph Prewar or WD 3HW 3H Cylinder head with rockers and valves

Triumph Prewar or WD 3HW 3H Cylinder head with rockers and valves


Triumph Prewar WD 3HW 3H Cylinder head with rockers and valves.

Part number is E1132 for the 3H / 3HW War Department Triumph 350cc side valves.

I have compared it with the 3HW engine that I have. The head looks identical with two exceptions. Instead of a cast number on the side, it just has a “J” cast and it has oil lines from the rocker spindles.

I would hazard an educated guess and suggest that the “J” is a war time production run casting.

Apart from a repaired fin on the underside that needs tidying, this head is very nice. There are two small chips to fins and the repair could be tidied up. Once fitted to a barrel, it’s unlikely that you would even see it.

Other Triumph 3H and 3HW parts: I have some including an almost-complete 3HW engine. Please view my other items or get in touch.




  • International shipping available. Please ask.
  • Combined shipping available if you buy other parts. 
  • I usually ship to most destinations. If you don’t see a price, please ask. Shipping is in addition to the listed price for the item.

Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.

Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.

Payment: This site has a facility to pay online. Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well.

Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.







Ref: 1122-H91

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