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#1
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Help - is my headgasket going....??
Right, so my third ever post here is asking if my headgasket is on it's way out...
The weekend I changed glowplugs 4,5,6 which all went a little bit too well - I'm always cautious when things go right, especially after everyone has warned me how "impossible" (to quote a few) a job that is. I noticed a lot of oil down that side of the block, from the cylinder head downwards. Staying rational about it, I just cleaned off all the oil hoping i would not re-appear. Well, I've done 200 miles since, so checked again today - and it's back - although not as bad. There is definite oil puddling on/around the bits of the headgasket you can see that stick out from head/block. But only around cylinders 3-5. Still suggests to me headgasket, but trying to stay hopeful, I am wondering if it would be the gasket on the vacuum pump leaking down onto the headgasket. **Edit** - forgot to say I've had the car 2 months, done 2,000 miles so far, and no loss of coolant. Coolant is a fairly clean looking green and has been just above "Min" since I bought it. Oil usage is minimal, but on a cold morning start-up there is a little blue smoke for 2-3 seconds so obviously burning a little when cold. I've taken a few pics (the best I could get - there is too much stuff in the way to get good pics). Opinions please..... No oil round Cylinders 2-3: Just behind No.3 glowplug you can see oil around HG: From underneath. I am almost convincing myself it's coming down from the Vacuum pump.... But, does it explain this over by cylinders 4-5? Maybe oil trickled back: |
#2
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Looks like the oil leak my car had when the vac pump gasket was gone (not there). Clean the entire area again, and run the car for 10 minutes, shut it off, let it cool, and check the area directly under the vac pump with a clean white rag, where it bolts to the head. If it's the vac pump gasket, you will find fresh oil at the mating surface there between the vac pump and head.
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1985 744 gle d24t 1985 745 gle d24t |
#3
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That's what I did try to do before, but after 10 minutes didn't show any oil - has only shown after few days of driving.
To change the gasket on the Vacuum pump is it as simple as undo the 2 nuts, clean surfaces of old gasket, and replace vacuum pump with 2 nuts? Or is there something complicated inside the vacuum pump? (sorry, new to diesels) |
#4
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Based on your pictures, I think you are correct about the vacuum pump seal being the culprit. Does the oil look like it could be coming from above the vacuum pump, at the valve cover gasket? Mine used to leak pretty badly from the valve cover gasket: oil was covering both sides of the block.
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#5
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Quote:
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#6
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Is the vacuum pump gasket easy to change?
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#7
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Easy. Gasket is a large thin oval-shaped o-ring. Loosen the lower nut first when disassembling, tighten it first when assembling, to avoid breaking the lower boss. Take care to not let the actuator rod slide all the way out. If it does slide out, you must replace it in the same orientation.
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1985 744 gle d24t 1985 745 gle d24t |
#8
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Quote:
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