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Author Topic: Dry rocker gear.  (Read 255 times)

LR1MICK

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Dry rocker gear.
« on: March 26, 2019, 04:28:14 PM »
Anyone had any problems with oil not coming out on to the rocker levers when running. I have oil coming up to the top via feed pipe but not out the oilways in the levers.

cobbadog

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Re: Dry rocker gear.
« Reply #1 on: March 27, 2019, 02:28:41 AM »
What engine model do you have?
Our CD8 has no oil feed to the rockers but if yours does and nothing is flowing out of them then you have a blockage and should be a simple fix by stripping the rockers off the shaft and cleaning them up. It is possible that the blockage is in the shaft so poke it clean and soak it and use an air compressor to ensure it is really clean. Then check the oil holes in the rockers and the same.
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LR1MICK

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Re: Dry rocker gear.
« Reply #2 on: March 27, 2019, 07:33:36 AM »
Engine is LR1 diesel. I have removed the rockers ready for stripping down and cleaning. I like you think the problem lies in the rocker assemblies now.

Will let you know how it goes later in the week.

Cheers.

ajaffa1

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Re: Dry rocker gear.
« Reply #3 on: March 27, 2019, 08:50:06 AM »
Hi LR1MICK, you say that you have engine oil to the cylinder head but nothing to the rockers. I am with Cobbadog in thinking you have a blockage. Some Lister engines had a restrictor wire inside the oil riser pipe to the cylinder head, this was to reduce the flow into the cylinder head. This wire can corrode and disintegrate into a rusty mess if you have had water contamination.

Let us know how you go,

Bob

LR1MICK

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Re: Dry rocker gear.
« Reply #4 on: March 27, 2019, 08:29:53 PM »
Hi Bob

Yes oil pumps out the pipe at the top tee piece when the engine is turned but not out the rocker levers themselves.

Thanks for letting me know about the restrictor too!

Will let you know how it goes.

Mick

LR1MICK

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Re: Dry rocker gear.
« Reply #5 on: March 28, 2019, 06:40:52 PM »
Hello guys,
I have stripped the rockers on the lr1 only to find the oilways clear as a bell. However....
It would appear the rocker posts may be incorrect, apparently they were redesigned around 1969 and the ones on my engine are stamped LD. But my engine was built in 1974. I think i may need to source a pair of later style rockers to fit. Whats your thoughts on this please?

Cheers

cobbadog

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Re: Dry rocker gear.
« Reply #6 on: March 29, 2019, 05:45:45 AM »
Can you drill these ones to being correct?
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LR1MICK

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Re: Dry rocker gear.
« Reply #7 on: March 29, 2019, 12:04:03 PM »
Sorry for any confusion but I have checked with a Lister specialist and the rocker posts are correct. I'm currently using 15w40 oil so maybe it's the oil so will reassemble and try straight 40 instead and go from there.

Cheers

cobbadog

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Re: Dry rocker gear.
« Reply #8 on: March 30, 2019, 02:48:02 AM »
Can you blow air through them and the rockers?
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LR1MICK

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Re: Dry rocker gear.
« Reply #9 on: March 30, 2019, 07:39:53 AM »
Hi cobbadog
Yes the oilways are clear. I have generously lubricated them and shafts and got them ready for fitting back to the engine

cobbadog

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Re: Dry rocker gear.
« Reply #10 on: March 31, 2019, 04:47:30 AM »
Keep us informed.
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LR1MICK

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Re: Dry rocker gear.
« Reply #11 on: April 14, 2019, 03:56:54 AM »
All back together, oil changed and tappets done and runs fine now. Thanks guys.

cobbadog

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Re: Dry rocker gear.
« Reply #12 on: April 15, 2019, 05:56:34 AM »
great result, well done.
Coopernook - the centre of our Universe.