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Help: Leaking coolant - only when engine is cool - from behind oil pan .......
by
ReubenG
on 30 Jun, 2014 12:31
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81 diesel 1.6 ; recently replaced water pump, t-stat, radiator, and hoses. Drips coolant from behind oil pan, seemingly only when the engine is cool... I can't tell where it's coming from, but it definitely doesn't appear to be any of the hoses, or the radiator, or the water pump
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#1
by
vanbcguy
on 30 Jun, 2014 13:42
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A freeze plug would be my first guess... There's 3 in the back of the block below the exhaust manifold.
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#2
by
theman53
on 30 Jun, 2014 14:09
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When you did the water pump did you replace the housing or just the pump. If you did the housing I could see it leaking from the o ring to the block and running around the block to the back...if it wasn't leaking before you did all the work.
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#3
by
ReubenG
on 01 Jul, 2014 11:17
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I never touched the freeze plugs....would they begin to leak for some reason after performing this maintenance? -- as for the pump, yes I replaced the entire housing too, with new o-ring, but it doesn't appear to be leaking from there. I'll take a closer look, but I think that's ok.
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#4
by
vanbcguy
on 01 Jul, 2014 12:04
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Sometimes things have been happening for a while but until you start checking things over after working on them you don't notice.
Freeze plugs for instance can be weeping for a while and then once you flush the block and knock out the scale and rust that was sealing them, a small weep becomes more significant.
Easy enough to check either way. If coolant is coming from the back of the engine there are only a very few possible sources.
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#5
by
smutts
on 23 Jul, 2014 13:50
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Dying head gasket is also a possibility, drove me mad trying to find mysterious leak behind the block (no coolant pressurisation), until the thing blew properly 9 months later.
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#6
by
ReubenG
on 24 Jul, 2014 13:13
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Yes, it's definitely the freeze plug(s) --- One of them has a rubberish extension coming off it and coolant is pouring out of there. What is this? Also, the block heater is there, and possibly leaking a bit. Tips?
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#7
by
ORCoaster
on 24 Jul, 2014 13:15
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Remove and repair. two tips no charge
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#8
by
vanbcguy
on 24 Jul, 2014 13:32
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Yup. Knock em out, hammer in new ones, done. If you don't use / need the block heater you can replace it with a normal freeze plug.
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#9
by
ReubenG
on 24 Jul, 2014 14:19
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#10
by
ReubenG
on 25 Jul, 2014 09:39
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can I replace the core heater plug with a regular freeze plug? any DIYs on removing the plugs? THANKS
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#11
by
vanbcguy
on 25 Jul, 2014 11:26
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Yes, absolutely.
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#12
by
ReubenG
on 04 Aug, 2014 09:41
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Lucky for me it was only the core heater that was leaking and not any of the freeze plugs. Took 5 minutes to remove the old heater plug and put in a new one. ... then refill cooling system of course. Thanks!
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#13
by
smutts
on 06 Aug, 2014 14:39
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One of them has a rubberish extension coming off it and coolant is pouring out of there. What is this?
Could be the turbo coolant return hose, at least that is how it is on the SB & RA engines.