8ha
Active Member
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on earley 2/4 engines this could happen don't know about later ones might have modified manifold
Bad knock under load
- Thread starter blue beasty
- Start date
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8ha
Active Member
- Posts
- 228
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- bridport dorset
on looking in scrap bin this was an earley manifold withmanifold is an exhaust butterfly yours looks like later type so unless manifold is cracked not very likely the promlem
blue beasty
Leaks an prone to bits dropping off
- Posts
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Compression test results.
1-170psi
2-160psi
3-50psi
4-90psi
That's fairly conclusive then
1-170psi
2-160psi
3-50psi
4-90psi
That's fairly conclusive then
Hicap phill
Well-Known Member
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- 15,403
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- Wiltshire
better gasket needed then 
Happy spannering
Happy spannering
Mulcaster1
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How are you guys linking the lack of compression with the noise? For sure it won't help idle and power but I cannot see why it would return a noise so adverse - unless there has been piston/fire ring contact
Hicap phill
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I would say the noise is popping between the 2 pistons. Compression test proves this. Normally happens between bores 2&3 on tdi
Tall Ratbag
Active Member
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I haven't followed the story from the start, but, why was the head gasket changed to begin with?, ... is there a lurking root cause to look for?
blue beasty
Leaks an prone to bits dropping off
- Posts
- 61,112
- Location
- Gloucestercotshirewolds
blue beasty
Leaks an prone to bits dropping off
- Posts
- 61,112
- Location
- Gloucestercotshirewolds
Holed radiator originally back in October, over heated but changed rad on the side of the road and seemed ok.
Gasket went over Christmas clouds of steam so skimmed head and changed gasket. 6weeks later and well.... pic above
Tall Ratbag
Active Member
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Has there been some leakage between 1 & 2 also? There look to be some dark marks on the gasket. If so, is the head truly skimmed flat?
As an example, if the milling machine had an adjustable head which wasn't truly at right angles to the bed of the machine, the cutter would cut a slight dish rather than perfectly flat. You can sometimes see this effect in the pattern left by the cutting tool.
Similarly, is the block surface flat? Have the threads in the block pulled up?
As an example, if the milling machine had an adjustable head which wasn't truly at right angles to the bed of the machine, the cutter would cut a slight dish rather than perfectly flat. You can sometimes see this effect in the pattern left by the cutting tool.
Similarly, is the block surface flat? Have the threads in the block pulled up?
Thor1950
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A new head gasket won't fix your problem. You got some serious warpage some where
blue beasty
Leaks an prone to bits dropping off
- Posts
- 61,112
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- Gloucestercotshirewolds
Threads in the block look fine. I doubt the block surface is warped, she did over heat originally but only marginally. There is sign of leakage between 1& 2. Don't know about the head skimming yet other than people I respect recommend them.
I'm wondering if the torque wrench I used is wildly out.
Turboman
Mab An Gov
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- 60,151
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- Lathrowda, Kernow
Holed radiator originally back in October, over heated but changed rad on the side of the road and seemed ok.
Gasket went over Christmas clouds of steam so skimmed head and changed gasket. 6weeks later and well.... pic above
Not changed a petrol head gasket for years. Just a thought, is copper gasket the norm on petrol engines these days?
They were always trouble on the diesels, I have been using composite for years when I have done them.
Thor1950
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BB how about new head bolts? and did you run a tap down the threads to clean the up, so you got clean holes to work with?
Hicap phill
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Get a steel rule to check head & block for warpage. Good composte gasket needed.
I blame swindon for the cause of your problems
I blame swindon for the cause of your problems
blue beasty
Leaks an prone to bits dropping off
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It was all I could get off the shelf, can't say I was that happy about it but was in a hurry.
Turboman
Mab An Gov
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- 60,151
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- Lathrowda, Kernow
You can check them with a big spring balance, or borrow someone elses for comparison.
They usually last for donkeys if reset to zero after use.
blue beasty
Leaks an prone to bits dropping off
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- Location
- Gloucestercotshirewolds
Didn't feel I needed to, bolts spin down happily by hand.
Turboman
Mab An Gov
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Although it says the bolts can be re-used, I always get new ones. And did you check there was no oil or water in the bottom of the holes before fitting?
blue beasty
Leaks an prone to bits dropping off
- Posts
- 61,112
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It was borrowed so I can't vouch for it, mine only goes up to 50 ft/lbs
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