Does anyone know of a web site where I can find torque settings for engine bolts?
The reason I ask is that it appears the head gasket on my girlfriends 2001-Corsa is leaking (sludge in the oil) and before I go to the expense of getting a garage to replace it, I'd like to make sure its not just that there is a loose bolt.
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well if you say what engine it is, Im sure someone will tell you. Otherwise buy a haynes manual or autodata.
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2001 Corsa 1.2 petrol {Added to subject header, as per the "sticky" request at the top of the page - DD}
I'm trying to avoid buying a Haynes manual hense asking the question here, so any suggestions welcome.
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Thanks. I guess there are no websites then. I really wanted the info tonight but I'll have to get to the library tomorrow.
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I'm pretty sure its going to a 'torque+angle' setting - so I'm not sure how helpful the information will be unless you intend removing and replacing all the bolts. Note also that head bolts don't normally 'work loose'!
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I'm pretty sure its going to a 'torque+angle' setting...
Indeed, I *think* it should be 25Nm +60 +60 +60
If the bolts are suspected, I would;
i) mark each bolt position relative to the head
ii) release the coolant pressure
iii) One by one
a) release each bolt
b) torque up the bolt using the correct settings (I'd double check the figures I have given)
c) check to see if the bolt marks align
iv) If any bolts have moved significantly, I'd be tempted to fit a new bolt in that location
Number_Cruncher
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Indeed, I *think* it should be 25Nm +60 +60 +60
Yep, that matches the data I have from the Haynes data book.
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Before assuming it is the head gasket you might want to describe in detail what you mean by "sludge in the oil" so the experts here can offer a diagnosis. Whilst not always the case, head gasket failure often means regular topping up of coolant or oil in the coolant - often seen floating in the expansion bottle. When was the oil & filter last changed? Is the car using lots of coolant?
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The oil filler cap and rocker cover have a covering of both oil and what looks like brown/cream coloured pasty mayo.
Its not been using lots of coolant.
Car's history.....
Owned from new. The car has done 59,000 miles with the first 50,000 being done on a 50 mile commute (25 miles each way so still not long trips).
Recently (last 6 months) its only used for short journeys normally 11 miles to work.
When it does get a go on a motorway its a 150 mile journey.
What has been noticable (and the reason I checked the filler cap) is a drop off in power, not massive obviously as its only a little engine but its definitely dropped.
The car is serviced on the dot, once a year, even though the offical service interval is 20,000 miles. Last service was 8,000 miles ago and it will be serviced again in 2 months regardless of mileage.
Fairly sure its the gasket. I know I'm being optimistic about it being just a loose bolt, but the prospect of getting the gasket replaced is making me look at any other option!! :-)
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Waste of time messing with head bolts.
Run it round to local garage or MoT station and give them £10 to wave 4-gas probe over the header tank. If HC is detected then head gasket is gone. Tightening bolts won't help.
If its not losing water and hoses aren't going hard shortly after start-up then head gasket is probably OK.
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Waste of time messing with head bolts.
Yes... and no.
If the gasket has gone, then, obviously it's a waste of time.
Although unusual, I have stopped leaks a time or two (once on a Honda Accord, once on a VW Polo) using the method I described.
I agree with the suggestion of sniffing the header tank - that's definitely a good idea.
Number_Cruncher
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Great. In that case the car is going to the garage on Monday and I'm going to spend tomorrow on the motorbike rather than fiddling with cars!
Thanks all.
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I doubt its the HG if you don't have to top the water up. I've got the same car on 39000 miles and theres mayo under the filler cap even though it goes on a 20 mile round trip to work and back most days. I've never had to top the water up so I put it down to the cold weather we've recently been having.
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You can of course have a water way to oil return gallery leak and there will be no HC's to detect or pressurised hoses just a slow loss of coolant. Regards Peter
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