Benzine
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| posted on 17/11/08 at 07:57 PM |
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quote:
Originally posted by Volvorsport
is it running yet ?
nah  I think i'll just dump it in the north sea
I think I'm back to my original problem of the engine being too hard to crank over, there must be something wrong there...
[Edited on 17/11/08 by Benzine]
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mr henderson
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| posted on 17/11/08 at 08:12 PM |
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What is the history if this engine, and what fuel system are you going to use? Why do you thing that there is something wrong with the engine?
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Benzine
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| posted on 17/11/08 at 08:37 PM |
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Engine bought from ebay and stripped down & checked. Bores looked great, reassembled but didn't check the cylinder head (cleaned and
inspected the combustion chamber but didn't remove any valves)
I seem to remember having the engine assembled (minus the cylinder head) on the engine stand and turning it over by hand then and it being a quite
stiff ( i just thought it's bound to be stiffer than the pinto as there are two more cylinders) But how stiff is stiff? I just don't have
the experience in engine building to know when something isn't right etc.
When I have the spark plugs out the engine spins over but does struggle slightly. When the plugs are back in it really struggles so there must be
something wrong. Valves/cams and/or crankshaft? T_T
Also to add, I have a spare cylinder head that I'm taking apart at the moment (v.cheap on ebay so thought I'd have a go at removing all
the valves, new seals, light porting etc) as it was so cheap to have a spare (came with cams too)
I guess one way to check how much effect the cylinder head is having on cranking is to take it off or remove the cam belt.
[Edited on 17/11/08 by Benzine]
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NeilP
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| posted on 17/11/08 at 08:48 PM |
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Did you renew any of the crank bearings?... Without heads the engine should turn over easily by hand unless you've put in new shells and even
then only slightly stiffer.
Worst case, warped crank and a visit to the North sea, slightly better case a binding bearing (regrind and new oversize shells), best case something
obvious I can't think of but one of the guys will...
If you pay peanuts...
Mentale, yar? Yar, mentale!
Drive it like you stole it!
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Benzine
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| posted on 17/11/08 at 09:04 PM |
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I didn't renew any shells/bearing as it all looked like it was in good order (the engine had a lot of money spent on it within the last year of
it being in the original car) What would happen if the bearings/shells were put iun different places to where they were originally? i.e. they all got
mixed up... I'm having serious doubts that I didn't keep them all organised... T_T
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big_wasa
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| posted on 17/11/08 at 09:40 PM |
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quote:
no b6304 came in the 850 - only 960 and S80 btw .
I must have looked at the boot on the car above it, But it was a 24v straight 6 ?
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mr henderson
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| posted on 18/11/08 at 07:58 AM |
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quote:
Originally posted by Benzine
When I have the spark plugs out the engine spins over but does struggle slightly. When the plugs are back in it really struggles so there must be
something wrong. Valves/cams and/or crankshaft? T_T
Engines are supposed to be difficult to turn over when the plugs are installed, it's the compression, it's one of the reasons why engines
don't have starting handles anynmore
The question is, how difficult? Do you have a torque wrench, you can use that to measure the turnng torque (which you need to measure with the plugs
OUT)
Are you using the original injection set up?
John
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Benzine
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| posted on 18/11/08 at 12:49 PM |
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quote:
Originally posted by mr henderson
The question is, how difficult? Do you have a torque wrench, you can use that to measure the turnng torque (which you need to measure with the plugs
OUT)
Are you using the original injection set up?
Good idea, John. I just tried my torque wrench and at the maximun setting (60 Nm) it just clicked and wouldn't turn the engine over. It takes a
big breaker bar ( mine is maybe a meter long) and quite a bit of effort to turn it over, that can't be good
Yes, I'm using original injector set up
[Edited on 18/11/08 by Benzine]
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mr henderson
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| posted on 18/11/08 at 01:16 PM |
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And that is with the plugs out? Just to be clear.
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DarrenW
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| posted on 18/11/08 at 02:41 PM |
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you mentioned you 'may' have mixed the shell bearings up - im pretty sure this is a bad thing especially if the engine has done a few
miles and the wear patterns are different along the length of the crank. However if the have recently been changed and they are all the same size (and
crank was ground so all journals are same size) then you 'may' get away with it.
Id be tempted to just go ahead and try to get it fired up first before fearing the worst. Then at least worst case if you have to bung another lump in
everything else is ready. I really doubt you would have mixed the shells - you always sound to be good at the spannering, hopefully just one of those
moments where you are doubting yourself.
As Mr H says - is it as tight as with plugs in or out. If out - doesnt sound good. If in - might suggest good compression.
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Benzine
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| posted on 18/11/08 at 03:02 PM |
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That's with the plugs out T_T
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Volvorsport
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| posted on 18/11/08 at 05:21 PM |
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when you split the head , how did you clean the two halves ?
under no circumstance should you have used emery paper or rubbed them back to clean them (only scrape/dissolve the liquid gasket)
you can get them tight , since its happened to me when i got supplied two cleaned up parts of cylinder head , put the together engine was a right
barsteward to turn over , theres no other way of checking tho .
take the cam belt off - and release the top off the cylinder head and take the cams out .
turn it over - if its easy , i suggest its something like that - if its still tight - i suggest another engine to be quickest route , plus you may not
have the cams timed up properly either .
and keeping cranking while theres no oil pressure and dry bearings isnt a good idea either .
www.dbsmotorsport.co.uk
getting dirty under a bus
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