top and bottom End knock on rebuilt yb
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top and bottom End knock on rebuilt yb
Yesterday I finally finished rebuilding my cossie started it up and it ran prefect went with the first turn off the key but I have come back to it today n it had devolped a knocking from the top and bottom End. I have replaced all the big end shells the little end shells all the cam shells is had new pistons and rings the oil pressure is reading 2.4 bar cold then just over 1 bar when warm I haven't replaced the oil pump but it was working fine before I spotted the car and the old shells hardly had any wear on them. If anybody has any ideas is love to know to save me having to rip the engine out again and starting from scratch. Cheers
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Just bought n fit everything. Everything fitted snug into the new shells the only thing thay I did notice was there was some side to side pay in the con Rods not sure if that is normal or not and no I didn't strip the oil pump as I thought it was working fine before but reading up on the pressure it should be mine seems a bit down on what bar it should be
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Have you checked all the pulley bolts are tight? I had one work loose on the auxilary shaft that drives the dizzy and that made a knocking noise.
Worth checking all the pulley bolts are tight before you start stripping the engine again.
Worth checking all the pulley bolts are tight before you start stripping the engine again.
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#9
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You replaced the big end and small ends but you didnt replace the mains?
Did you measure the journals and check them for wear? Plasigauge them and check the end float?
Why did you replace the pistons? Are they oversized? Did you have the block honed?
Where did you get the cams shell from? I forgot about those. Ill speak to MAtt Lewis in the morning.
Did you measure the journals and check them for wear? Plasigauge them and check the end float?
Why did you replace the pistons? Are they oversized? Did you have the block honed?
Where did you get the cams shell from? I forgot about those. Ill speak to MAtt Lewis in the morning.
Last edited by DixieTheKid; 05-01-2014 at 04:35 PM.
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Is this Mo?
#12
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I meant to put mains not cams dont no why I put that... I changed the pistons because I was going to get the valve cut outs put into the originals but I got offered a deal for new pistons with the cut outs already in and a set of grey injectors. yes all the pulleys are tight I have checked them all.
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I meant to put mains not cams dont no why I put that... I changed the pistons because I was going to get the valve cut outs put into the originals but I got offered a deal for new pistons with the cut outs already in and a set of grey injectors. yes all the pulleys are tight I have checked them all.
Did you measure the journals, plastigauge and check the end float?
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They are standard mahle pistons that came out and the new ones are mahle pistons aswell also standard. The clyinders gave been honed n no I never checked them... is it going to be the case of engine out again or can I get away with removing the sump to check them?
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Have you checked it's timed it up properly?
It's very easy to time it up a tooth out.
On a Cosworth time the bottom pulley to the lug NOT the V.
Stick a ratchet / socket on, turn it over by hand to the marks and check.
I have seen ones a tooth out clipping the valves / pistons when running.
Got to be worth a check before going any further.
Hope it's an easy fix.
It's very easy to time it up a tooth out.
On a Cosworth time the bottom pulley to the lug NOT the V.
Stick a ratchet / socket on, turn it over by hand to the marks and check.
I have seen ones a tooth out clipping the valves / pistons when running.
Got to be worth a check before going any further.
Hope it's an easy fix.
#22
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Have you checked it's timed it up properly?
It's very easy to time it up a tooth out.
On a Cosworth time the bottom pulley to the lug NOT the V.
Stick a ratchet / socket on, turn it over by hand to the marks and check.
I have seen ones a tooth out clipping the valves / pistons when running.
Got to be worth a check before going any further.
Hope it's an easy fix.
It's very easy to time it up a tooth out.
On a Cosworth time the bottom pulley to the lug NOT the V.
Stick a ratchet / socket on, turn it over by hand to the marks and check.
I have seen ones a tooth out clipping the valves / pistons when running.
Got to be worth a check before going any further.
Hope it's an easy fix.
#23
Regular Contributor
Hope you get it sorted mate!
As said, you NEED to remove the engine and unfortunately rip it to bits. I'm currently 80% rebuilding my engine. If you need any advice ask.
Before installing the crank finally you should of checked your clearances with plastigauge to ensure you are within tolerance else you will run into issues. You also need to consider ring gaps, end float etc etc! There's alot to get right!
I'd suggest you buy a workshop manual also as it gives you all the relevant torque settings / clearance's etc.
I did weeks of research before i tackled mine.
Good luck!
As said, you NEED to remove the engine and unfortunately rip it to bits. I'm currently 80% rebuilding my engine. If you need any advice ask.
Before installing the crank finally you should of checked your clearances with plastigauge to ensure you are within tolerance else you will run into issues. You also need to consider ring gaps, end float etc etc! There's alot to get right!
I'd suggest you buy a workshop manual also as it gives you all the relevant torque settings / clearance's etc.
I did weeks of research before i tackled mine.
Good luck!
Last edited by L1AM_RS; 05-01-2014 at 09:44 PM.
#24
Happily retired
Agreed. Do you do your own dentistry as well same risk of the unskilled making a hash of it as building an engine with out knowledge of the job in hand.
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