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Chev 216 loose piston pin - which one ?
Hi
I have been working on my cab 11 C8 , a refurbishment and a general cleanup with the club rego in mind for later in the year . Anyway the first job is to fix the annoying rattle of a loose piston pin . At this point I don't know which piston is making the noise , the noise has always been there since I got the C8 running . The knock is only evident after revving the engine and then listening as it idles , the noise is not there when above idle speeds . I am doing this on my own, I know that I can remove a spark plug lead and listen for a change in the knock - but with only one pair of hands . Is there an easier method ? I have removed the engine covers, a major job in itself Another query. Does anyone know the dimensions of the valve guides for a 1940 216 engine ? The valve stem diameter and the length of the guides ? I think the 1941 engines are slightly different Thanks
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 14-05-15 at 12:34. |
#2
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C8
Don't have an answer for you Mike but great to hear we'll be seeing the C8 on the road again!
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Film maker 42 FGT No8 (Aust) remains 42 FGT No9 (Aust) 42 F15 Keith Webb Macleod, Victoria Australia Also Canadian Military Pattern Vehicles group on Facebook https://www.facebook.com/groups/canadianmilitarypattern |
#3
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Mike, with the engine covers off do you have enough access to use a long screw driver to listen to the side of each cylinder. That is what Dad used to do on Bedford engines.
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Robert Pearce. |
#4
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Hi Mike, you should be able to short it out at idle (it will only be audible at idle) (just use a screwdriver from plug lead to head)
If it is a timing gear noise, it won't short out.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#5
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Video of hunting an engine noise
Hi Mike
Here is a video of hunting down a noise inside the engine as suggested. I had a similar engine noise while the engine was still on the test stand. In my case it was not piston pin but only a miss-adjusted lower connecting rod. Remeasured and reshimmed noise when away. https://www.youtube.com/watch?v=cAjy8LjiexQ Cheers Phil
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Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
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Ok
Quote:
I will ask my neighbour down the road to help me out with the diagnosing of the piston pin noise in the C8 engine . The valve guides have a .342 " bore and a OD of 9/16" . There are cheap modern generic guides available with a .342" bore but they have a OD of 1/2" EGGE parts in USA have the correct guides for 2.60 $ US each but the postage is a killer .
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
#7
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squeeze
Robert you need to be a skilled circus acrobatic act in order to work on the engine in the cab 11 ...... or 12 . The mechano set bolt down engine covers in the cab 11 are a nightmare to remove
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
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progress
Been fiddling and the fuel pump decided not to work, as I removed the fuel bowl from it, a nasty smell of stale petrol appeared . After investigation, the pump was gunked up with a fine brown gunk. Modern petrol is the culprit here , it leaves a brown film on fuel components , it can block jets and cause trouble in petrol tanks .
re: the valve guides , American auto parts in Ballarat have the generic early chevy guides, over 3" long , for $5 each. I will machine them to length . I also got a aluminium timing gear to fit , I've seen the old fibre gears strip teeth too often .
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
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running
Well, the engine has had a run, warmed up and had a listen, could not hear anything out of order . The mystery noise comes and goes .
The water pump bearing is growly, this is a problem Ive always had with these engines. You buy a old stock kit, made 60 years ago, and the bearing grease has dried out , you install the kit and give it a try , the bearing sounds horrible . You buy a modern bearing , made in Taiwan, it lasts 3 months and is stuffed and wobbly and the pump leaks . What do you do ? The bearing is a sealed unit. I will dismantle one and see if it is possible to re lube it somehow ? The 75 year old radiator is also leaky ..looking rather sad . May have to do the recore .... save some pennies .
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 28-05-15 at 10:27. |
#10
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Quote:
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Terry Warner - 74-????? M151A2 - 70-08876 M38A1 - 53-71233 M100CDN trailer Beware! The Green Disease walks among us! |
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