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Topic: Engine repair 2.5td - overheat (Read 8628 times) |
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Mike H
Senior Member
Renault Clio
  
Posts: 2594
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Re: Engine repair 2.5td - overheat
« Reply #20 on: Jul 15th, 2010, 12:11pm » |
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Quote:There where sidewaysplay in crankshaft (the clutch to belt-wheel-way) in the crankshaft
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By "sideways", do you mean moving it toward left or right sides of the crankcase? Not forward / back ("endfloat")
Quote:The crankshaftbearings where weird. Never seen that kind of crankshaftbearings before.
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In what way, weird?
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Mike H
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btl-norway
Newbie
I'm a YaBB newbie!
Posts: 15
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Re: Engine repair 2.5td - overheat
« Reply #21 on: Jul 15th, 2010, 12:39pm » |
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HEAD #1
HEAD #2
HEAD #3
HEAD #4
on Jul 15th, 2010, 12:11pm, Mike H wrote:
By "sideways", do you mean moving it toward left or right sides of the crankcase? Not forward / back ("endfloat")
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By sideways I mean not left/right. If I take a good grip in the beltwheel that drives the alternator, servo, ac en I do
waterpump. I can move it into the engine and out from the engine. Maybe 4mm? And I hear a knocking sound when I do this. I guess this is what happened to this engine, and why It started knocking.
on Jul 15th, 2010, 12:11pm, Mike H wrote:
It locks like I have to take the crankshaft out through the engine (cluchside), and not straight up like I have done other engines I have dealed with.
I have not taken any pistons out of the engine jet. Neet to make space for it in the garage first.
on Jul 15th, 2010, 6:43am, Simmo wrote:
If you post them please make sure they are only 640/480 pixels in size. This is a requirement on this site. The current ones are 1024/683 and should be reduced as well please. Thank you. |
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Sorry, but I have resized all the pitures now 
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- Scorpio 2.5td
x XR4x4 twinturbo
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Engine repair 2.5td - overheat
« Reply #22 on: Jul 15th, 2010, 12:54pm » |
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Quote:I can move it into the engine and out from the engine. Maybe 4mm? And I hear a knocking sound when I do this. I guess this is what happened to this engine, and why It started knocking
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A-ha, that is "end float". Some end float is common in all engines and indeed is necessary to account for heat expansion. 4mm does seem a bit extreme though. Maybe there is a thrust washer that has worn down?
If it is "knocking", that traditionally suggests big end bearing loose.
Can you tell if any of the big ends rattle from side to side? That is pushing / pulling in the same direction that the piston moves.
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Mike H
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Engine repair 2.5td - overheat
« Reply #23 on: Jul 15th, 2010, 7:16pm » |
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looking at your new pictures i would say those heads are ok, it appears to be a core plug fitted between the inlet and exit valves, with 'machine marks', it would be these plugs that have produced the cracked look on the overheated heads, perhaps they moved and deformed through the heat.
as your old engine was only knocking, as mike H says this would be a bottom end issue, so top end will be ok, personally i would fit these heads and run a simple compression check
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FDS2000 Scans - Birmingham
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btl-norway
Newbie
I'm a YaBB newbie!
Posts: 15
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Re: Engine repair 2.5td - overheat
« Reply #24 on: Jul 15th, 2010, 11:25pm » |
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That is good news.
I will come back with more info when I have worked more with the engines
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- Scorpio 2.5td
x XR4x4 twinturbo
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Simmo
Administrator
I'm an OAP !
Posts: 5508
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Re: Engine repair 2.5td - overheat
« Reply #25 on: Jul 16th, 2010, 7:47am » |
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Thank you for sorting the picture size.
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Now I'm an OAP
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