dan-t Posted April 13, 2019 Report Share Posted April 13, 2019 hi I have rebuilt my tr4a engine all machined or replaced. started it after getting oil pressure up and it sounds like some one is constantly hitting the sump with a screwdriver. is there an obvious must do I have missed. I have built several engines in the past although not wet liner ones, but did check liner heights before fitting pistons. any advice would be gratefully received. Thanks, Dan Quote Link to post Share on other sites
rcreweread Posted April 13, 2019 Report Share Posted April 13, 2019 Dan - check you haven't put the closing plate between the bellhousing and back of the block the wrong way round - take it off and fire it up. Good luck cheers Rich Quote Link to post Share on other sites
RogerH Posted April 13, 2019 Report Share Posted April 13, 2019 Hi Dan, somebody posted today that they had a sticking tappet (follower tight in the bore) that caused a knocking/tapping sound. Have you used a screwdriver stethoscope to try and localise the noise. Roger Quote Link to post Share on other sites
Motorsport Mickey Posted April 13, 2019 Report Share Posted April 13, 2019 That sounds like an end float problem and the crank is hitting a journal, DON'T run it anymore. Drop the sump and check the endfloat, at the same time do what Rich suggests, you can remove the tin plate which is on the bottom quarter of the gearbox sealing it off from pebbles etc. The "flange" on the tin plate has to point towards the front of the car, if you have it the wrong way round it makes a god awful din as the flywheel tries to carry out a bit of machining on the tin flange which sticks into the bell housing, it gets worse when you depress the clutch. Mick Richards Quote Link to post Share on other sites
dan-t Posted April 13, 2019 Author Report Share Posted April 13, 2019 Thanks for the replies I will check all these tomorrow Quote Link to post Share on other sites
JJC Posted April 15, 2019 Report Share Posted April 15, 2019 Did you have any luck? Please let us know - it builds up the collective knowledge. JJC Quote Link to post Share on other sites
dan-t Posted April 15, 2019 Author Report Share Posted April 15, 2019 Hi, I haven't managed to get under the car yet. I will try and report back this week. Thanks for the interest. Dan Quote Link to post Share on other sites
dan-t Posted April 16, 2019 Author Report Share Posted April 16, 2019 Hi, As an update I have taken the cover plate off and run the engine and still the same noise unfortunately. I also put a lever on the front pulley to check for excessive end float and it seems ok. I haven't tried localising the noise with a screwdriver yet. The cam followers went in well and seemed quite free when fitted. Should I think about dropping the sump and removing the head to investigate? thanks , Dan Quote Link to post Share on other sites
Chilliman Posted April 17, 2019 Report Share Posted April 17, 2019 Did you by any chance replace the con rods? Quote Link to post Share on other sites
dan-t Posted April 17, 2019 Author Report Share Posted April 17, 2019 I didn't replace the con rods but did have the small end bushes replaced Quote Link to post Share on other sites
Rob Salisbury Posted April 17, 2019 Report Share Posted April 17, 2019 Check that the rods are assembled such that the big end bolt heads face the camshaft side of the block, it's possible to have them the other way round. Cheers Rob Quote Link to post Share on other sites
Motorsport Mickey Posted April 17, 2019 Report Share Posted April 17, 2019 I think going back to my posting above may pay you off Dan, somebody hitting the sump with a hammer shouldn't be ignored ! and having a look inside there will allow you to see any "witness" bright marks if anything is contacting something else. You can even get a friend to turn the engine over slowly with a socket on the crankshaft nose whilst you lay underneath (with a hat, face mask and goggles on) look out for drips. Mick Richards Quote Link to post Share on other sites
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