64EK26 Posted June 26, 2017 Posted June 26, 2017 Hi How much allowable play is allowed in the timing chain, see attached drawing From the Bedford Shop Manual Type: Duplex Roller Pitch: 3/8" Number of Pitches: 54 Width over Joint: 0.93" [is this the allowable play, as I have never come across this term before Cheers Richatd Quote
Richard Farrant Posted June 26, 2017 Posted June 26, 2017 Hi How much allowable play is allowed in the timing chain, see attached drawing From the Bedford Shop Manual Type: Duplex Roller Pitch: 3/8" Number of Pitches: 54 Width over Joint: 0.93" [is this the allowable play, as I have never come across this term before Cheers Richatd Richard, The width measurement relates to the chain type. There should be no appreciable slackness. If there is a lot of slack then both sprockets need checking for wear as well, as when fitting a new chain on worn sprockets, it will not last long. Take a photo of yours on the engine, with you pushing one run in so we can see how much slack there is. Quote
64EK26 Posted June 26, 2017 Author Posted June 26, 2017 Hi Richard Thanks for the quick response, the distance I can push it in is about 7/8". That is why I was concerned. I will post a photo in the next few days (the enging block is not at my house at the moment, it is very heavy to lift!). I will also inspect the gears. Cheers Richard Quote
Richard Farrant Posted June 26, 2017 Posted June 26, 2017 Hi Richard Thanks for the quick response, the distance I can push it in is about 7/8". That is why I was concerned. I will post a photo in the next few days (the enging block is not at my house at the moment, it is very heavy to lift!). I will also inspect the gears. Cheers Richard That is quite a bit of slack. When new they are snug, any slack allows backlash on the cam which ultimately effects both valve and ignition timing Quote
64EK26 Posted June 29, 2017 Author Posted June 29, 2017 Hi Sprockets look a little worn but are OK This is what it looked like and this is with a new timing chain (virtually no slack as what I had expected) The chain had stretched about 1/4" !!!. God knows what it sounded like when it was last running Cheers Richard Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.