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Bamford Z2 4 1/2 HP Diesel Engine


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  #1  
Old 08-12-2016, 08:51:38 AM
sheridan sheridan is offline
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Default Bamford Z2 4 1/2 HP Diesel Engine

I am trying to decarbonize our engine in the Thermo Lab at Sheridan College but am unable to remove the head cover there seems to be something keeping it from lifting off but I am unable to see what it is. If anyone knows what it could be I would appreciate your advice.
Dave
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Old 08-12-2016, 01:13:02 PM
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Craig A Craig A is offline
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Default Re: Bamford Z2 4 1/2 HP Diesel Engine

Welcome to Stak.......
Let's what happens in this forum.......
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Old 08-12-2016, 04:49:37 PM
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Default Re: Bamford Z2 4 1/2 HP Diesel Engine

I have summoned one of our experts...

With the head bolts loosened a few turns can you bump the head loose with compression?
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Old 08-12-2016, 05:33:56 PM
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Default Re: Bamford Z2 4 1/2 HP Diesel Engine

Hi,
I am not certain what you are referring to as the "head cover"? If you are talking about the valve cover it is rerained only by the 4 nuts on each corner and what ever gasket sealer was applied last time. If you are referring to the cylinder head then they get stuck around the studs due to close fit and rust from water sealing up from the deck. They can be stuck hard and I have in the past resorted to driving thin chisels through the head gasket at several locations to start things moving.
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Old 09-02-2016, 03:18:20 PM
sheridan sheridan is offline
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Default Re: Bamford Z2 4 1/2 HP Diesel Engine

Thank you for your advice. I finally got the valve cover off by removing the studs completely. It turns out that a rocker arm was seized on the shaft. I am making a new pivot shaft and hopefully that will resolve our starting problems.
Thanks again,
Dave
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Old 09-14-2016, 10:43:35 AM
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Default Re: Bamford Z2 4 1/2 HP Diesel Engine

Quote:
Originally Posted by sheridan View Post
Thank you for your advice. I finally got the valve cover off by removing the studs completely. It turns out that a rocker arm was seized on the shaft. I am making a new pivot shaft and hopefully that will resolve our starting problems.
Thanks again,
Dave
The Bamford Z series had very little lubrication up there and it is common to see the shafts, rockers and valve guides badly worn. The problems is very much aggravated if the engine is run slower than rated RPM. I have never figured out of it was a factory update or field modification but many of them have a drip oiler mounted on the valve cover to rectify the problem.
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