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1.6 mech head leaking coolant between first and second cylinder
by
33B
on 28 Aug, 2021 04:34
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1.6 mech head leaking coolant between first and second cylinder, at the second head bolt looking from timing belt on the IP side (between head and block). Didn't mix oil and water, not pressuring hoses, normal temp, no smoke. I did replace the headgasked a few months ago, surfaces were flattened. Never overheated it, egs never exceeded 650 700 C. Could it be that the head isnt torqued correctly, my mechanic at the time didn't lube or clean the threads.
And can i get away with re torqueing the head.
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#1
by
ORCoaster
on 28 Aug, 2021 20:31
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You can do it. Pull one bolt out at a time in the proper sequence for tightening. Blow out the debris and possibly chase the thread with a tap if you have one. Then reset the torque to spec.
Go to the next bolt and do likewise, continue till done. Then redo them all with the quarter turn, I am assuming an early 80's head here. Possibly even an 11 MM one.
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#2
by
33B
on 29 Aug, 2021 01:38
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It's a 12mm star thing (idk name in english). But wouldn't i f it up because they are stretch bolts by pulling them out, should I just tighten them or pull them out?
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#3
by
ORCoaster
on 29 Aug, 2021 16:54
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I am pretty sure You can loosen and retighten stretch bolts. I have done it on my 1.6 without an issue.
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#4
by
sgnimj96
on 30 Aug, 2021 16:43
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#5
by
fatmobile
on 31 Aug, 2021 21:54
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Hydraulic head and mechanical block?
That's not a common place to leak otherwise.
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#6
by
33B
on 01 Sep, 2021 09:42
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Mech head and block. Bolts were not tightened properly. Luckily i got the tools now to do headwork myself and not rely on half*ss work mechanics do.
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#7
by
libbydiesel
on 01 Sep, 2021 15:33
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It's probably not going to seal up from retorquing the bolts. Probably you will need a new head gasket. Probably won't hurt to try retorquing, though.
Meticulous care during head gasket replacement is your best bet against ongoing issues. A light spray of hylomar on all four surfaces prevents the weeping leaks that are common at the oil drains or the pressurized oil channel. Clean the block and head meticulously. Chase the threads in the block using an old bolt with channels cut into it. Blow out the holes with compressed air. Lightly lube the new bolts with oil but wipe them off with a paper towel to ensure there are not drips. Torque them to the correct torque stages and in the correct order.
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#8
by
fatmobile
on 01 Sep, 2021 19:10
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16oz sour cream cups set into the piston holes can keep stuff from falling into the cylinders while cleaning the head.
sgnimj96 I tried that last time and it worked great.
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#9
by
ORCoaster
on 01 Sep, 2021 20:40
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fatmobile, I have visions of chips and dip in those cups. Work a little on the engine then go for a snack. Maybe throw some salsa and corn chips in the mix. Beer on the side. Now we are talking about working on a VW.
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#10
by
33B
on 02 Sep, 2021 08:36
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Whats hylomar. Some kind of spray on gasket maker or? Normally here people use very thin coat of gasket maker/rtv.
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#11
by
libbydiesel
on 02 Sep, 2021 16:51
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Hylomar is a gasket sealer. IMO it works better than rtv or the copper spray. You want the spray version, not the tube. A link was posted above by sgnimj96. Use a very light spray on all four surfaces.