Finlandese Posted September 19, 2021 Report Share Posted September 19, 2021 What the hell is going on over here? The sprocket is loose but the bolt doesn’t move. The washer below the bolt is loose. You can turn the shaft about 20 degrees, even though the sprocet is held in place by the timing belt. Help! 1 Quote Link to comment Share on other sites More sharing options...
Gold FFM Sparky Posted September 19, 2021 Gold FFM Report Share Posted September 19, 2021 Please detail how you found it. Did the engine stop running? I assume you're not trying to start it! I imagine you're looking at sprocket failure, and probably damage to your oil pump shaft. Do not even think of turning the key. 1 Quote British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland. And Shitfaced Silly Sod to Sweden. Link to comment Share on other sites More sharing options...
Finlandese Posted September 19, 2021 Author Report Share Posted September 19, 2021 (edited) 49 minutes ago, Sparky said: Please detail how you found it. Did the engine stop running? I assume you're not trying to start it! I imagine you're looking at sprocket failure, and probably damage to your oil pump shaft. Do not even think of turning the key. Had trouble starting the car and when it started, it had an intermittent jerk while driving, that felt like it was ignition related. Noticed that the distributor cover had come loose. After putting it back on car started normally, but now my friend, who was observing the start in the engine bay, noticed a tapping sound coming from the front of the engine. After a while we noticed the chafing ignition sprocket and shut off the engine. I remember hearing a similiar sound previously. I assumed it was the hydraulic tappets, but of course I should have remebered that the engine does not have them. I added oil and the sound went away. Edited September 19, 2021 by Finlandese Quote Link to comment Share on other sites More sharing options...
Gold FFM Sparky Posted September 19, 2021 Gold FFM Report Share Posted September 19, 2021 Do not start the engine. That sprocket must be removed for investigation, but first I'd manually turn the engine to ensure cam timing hasn't slipped with resultant engine damage. You'll need a new sprocket, possibly repair/renewal of the oil pump/distributor drive, and of course a new cambelt. 1 Quote British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland. And Shitfaced Silly Sod to Sweden. Link to comment Share on other sites More sharing options...
Finlandese Posted September 19, 2021 Author Report Share Posted September 19, 2021 8 minutes ago, Sparky said: Do not start the engine. That sprocket must be removed for investigation, but first I'd manually turn the engine to ensure cam timing hasn't slipped with resultant engine damage. You'll need a new sprocket, possibly repair/renewal of the oil pump/distributor drive, and of course a new cambelt. Thank you for your advice. We checked the timing and it was still correct. The cam markings lined up perfectly at the TDC. 1 Quote Link to comment Share on other sites More sharing options...
rgh0 Posted September 19, 2021 Report Share Posted September 19, 2021 Looks like something has failed in the distributor / oil pump assembly allowing the shaft to move forward, Pull it off and investigate cheers Rohan 2 Quote Link to comment Share on other sites More sharing options...
EXCEL V8 Posted September 22, 2021 Report Share Posted September 22, 2021 The sprocket abuts a wire-type circlip on the shaft. If the sprocket has moved closer to the engine maybe the circlip has failed or has eroded itself into the sprocket. Pete 1 Quote Link to comment Share on other sites More sharing options...
Finlandese Posted December 5, 2021 Author Report Share Posted December 5, 2021 (edited) Trying to get the oil pump off. All bolts are off, timing belt, distributor and the oil cooler is off. Why isn´t the pump coming off? More force? After that, the mystery of the coolant lying on the block… Edited December 5, 2021 by Finlandese Quote Link to comment Share on other sites More sharing options...
EXCEL V8 Posted December 5, 2021 Report Share Posted December 5, 2021 Other than the 9 M8 bolts there is nothing else holding the pump to the block. There is an M6 hole at the pulley end of the casting just above the block - check nothing is attached - I don't know what it is for. Lever it up carefully if all bolts are out, but obviously don't damage the mounting surfaces. Pete 2 Quote Link to comment Share on other sites More sharing options...
Finlandese Posted December 6, 2021 Author Report Share Posted December 6, 2021 Light knocks with a hammer, and a bit of levering and it came off. The sprocket bolt needs more persuading. Letting it soak on wd40 for the night. Quote Link to comment Share on other sites More sharing options...
EXCEL V8 Posted December 6, 2021 Report Share Posted December 6, 2021 As it still has the countersunk screw securing the sprocket you may need to dig out a hammer and punch - they are sometimes really hard to get out. Pete 1 Quote Link to comment Share on other sites More sharing options...
Finlandese Posted December 8, 2021 Author Report Share Posted December 8, 2021 (edited) The mystery is beginning to unravel… The point of failure beng the dear PO who had not cleaned the sprocket bolt hole and therefore thought that the bolt had been tightened all the way. It was not and the play had started to eat in to the shaft, sprocket and the wedge. Edited December 8, 2021 by Finlandese Quote Link to comment Share on other sites More sharing options...
EXCEL V8 Posted December 8, 2021 Report Share Posted December 8, 2021 The countersunk screw is a bad idea as well. I'll be using a hex head bolt like the cam sprockets - much more reliable/removeable. Good progress though! Pete Quote Link to comment Share on other sites More sharing options...
Finlandese Posted December 9, 2021 Author Report Share Posted December 9, 2021 It seems that I have an Esprit 907 oil pump with an Excel sprocket. The fit to the auxiliary shaft is quite loose. Is that because these parts are mismatched, or due to the wear of loosely fitted sprocket? Does 912 sprocket with to the 907 auxiliary shaft? Quote Link to comment Share on other sites More sharing options...
EXCEL V8 Posted December 9, 2021 Report Share Posted December 9, 2021 They should all be the same. Must be wear. Are you planning to continue using the damaged auxiliary shaft? You could always get a new keyway cut in it if the diameter is still OK. The sprockets are hard anodised apart from the bore making the bore relatively easily damaged. Pete 1 Quote Link to comment Share on other sites More sharing options...
Finlandese Posted December 30, 2021 Author Report Share Posted December 30, 2021 Fixed with a new shaft and sprocket. No wiggle, nor contact, but the margin seems a bit tight for me ( maybe less than 1mm)… Quote Link to comment Share on other sites More sharing options...
Popular Post Finlandese Posted December 30, 2021 Author Popular Post Report Share Posted December 30, 2021 After a light dremeling… 4 Quote Link to comment Share on other sites More sharing options...
Finlandese Posted January 30 Author Report Share Posted January 30 Oil pump is in place, but I sm having an issue with the intake coolant hose running next to it. I decided to change it, but the replcement part from SJ’s is a straight hose, unlike the one that I had on it. Tried to put on anyways, but it kinks pretty badly, so that won’t work. Quote Link to comment Share on other sites More sharing options...
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