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Coolant loss and oil leak on my 90' syncro
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mjb1980
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PostPosted: Tue Apr 17, 2018 12:03 am    Post subject: Coolant loss and oil leak on my 90' syncro Reply with quote

Hi all,

Got a bit of problem with bus (2.1 petrol )recently noticed it has been losing litres of coolant and shedding oil from the dipstick and oil refill pipe. After clearing up oil mess and tightening all suspect pipes it's seems better. It did have a oil change not long ago with a new oil filter. Any ideas where to look before I send to the garage, could it bee the oil cooler?

Thanks
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djkeev
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PostPosted: Tue Apr 17, 2018 12:24 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

The oil cooler (if stock) is above the oil filter, a "squarish" metal box.

Spurting oil out the dip stick?
A) improperly inserted
B) oil overfilled
C) worn engine with excessive ring blowby.
D) clogged engine ventilation system

Coolant leaks? Any of a dozen or more locations. These engines have an amazing quantity of coolant hoses and fittings.
I would find and repair coolant leaks sooner rather than later.

Dave
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mjb1980
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PostPosted: Tue Apr 17, 2018 12:35 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

Thanks for reply, yes it's a stock cooler.

Dipstick is inserted properly, bit from what I can see the oil appears to coming from the middle join of the refill neck. It's hard to say, I've also noticed some oil around the top of the oil breather tower. Like you say there are many places for coolant to escape some inially I have tightened all clips on pipes, there is evidence of leakage and after a short run out it doesn't appearing to be losing coolant. But I am now question whether oil is cooling properly.

How do I check ventilation for blockages?
.thanks for help.

djkeev wrote:
The oil cooler (if stock) is above the oil filter, a "squarish" metal box.

Spurting oil out the dip stick?
A) improperly inserted
B) oil overfilled
C) worn engine with excessive ring blowby.
D) clogged engine ventilation system

Coolant leaks? Any of a dozen or more locations. These engines have an amazing quantity of coolant hoses and fittings.
I would find and repair coolant leaks sooner rather than later.

Dave
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djkeev
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PostPosted: Tue Apr 17, 2018 12:46 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

Crankcase ventilation is through that tower at the rear of the engine and the hoses to the intake system.
They can clog or collapse.

Why do you question your oil cooling?

What is the oil level?

The oil fill pipe is plastic forned to a metal pipe
That joint can and does fail.
A sealant can generally stop it after a good cleaning and quality application.

Curious this all started after an oil change.
Sounds like coincidence or a heavy handed "mechanic" over tightening things and cracking them.
If so, I'd worry about my oil drain plug, they are on the "fragile" side and easily stripped when it comes to heavy handed types.

Dave
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mjb1980
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PostPosted: Tue Apr 17, 2018 12:54 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

Well after a short run out yesterday I just sense the engine is a little warmer than it should be, I know that's not very scientific, but I just feels a little warm. I agree it's a bit of a coincidence. I'm pretty sure it was overfilled, but only oil and filter was replaced. Oil level looking spot on in the middle right now so that tells me it was over before. This was done by a mechanic whilst I was away past few months so I can only go by what I was told.

Oil drain plug looks fine, as does filter.
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Wildthings
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PostPosted: Tue Apr 17, 2018 3:10 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

How much oil are you losing? Do you just have some wet spots?

Is it dripping off the engine? If so where.

Is it pouring off the engine? If so where.

You should get your cooling system pressure tested. Note that if you have an automatic tranny there is a cooler bolted to the front of it that can leak between the coolant and the ATF.

You might also want to have your coolant checked for the presence of exhaust gases.
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djkeev
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PostPosted: Tue Apr 17, 2018 3:15 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

You say you lost liters of coolant.

Did you add liters of coolant back in?

A loss of coolant will cause the engine to run warmer.

Dave
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mjb1980
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PostPosted: Sun Apr 22, 2018 3:53 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

Hi guys,

Just an update, cleaned out breather which seemed OK anyway. Coolant maintaining it's level so no more leak (after tightening a few clips) but oil is still coming out the neck of the oil filler. The oil level is is in the middle so is correct, only seems to come out on a run and not on idle.

Thoughts on next steps? Is it that it just needs to be sealed, or should oil not coming up that far?

Thoughts appreciated.



djkeev wrote:
You say you lost liters of coolant.

Did you add liters of coolant back in?

A loss of coolant will cause the engine to run warmer.

Dave
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DanHoug
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PostPosted: Sun Apr 22, 2018 5:05 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

clean the joint between the metal pipe and the plastic oil filler with carb cleaner and a toothbrush, then work in a black RTV sealant up under that joint and make a nice smooth bead around the outside using your finger. finish it up with a screw drive hose clamp about 1/2" above that joint. let everything harden 24hr before you start it.

-dan
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Wildthings
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PostPosted: Sun Apr 22, 2018 7:32 am    Post subject: Re: Coolant loss and oil leak on my 90' syncro Reply with quote

mjb1980 wrote:
Hi guys,

Just an update, cleaned out breather which seemed OK anyway. Coolant maintaining it's level so no more leak (after tightening a few clips) but oil is still coming out the neck of the oil filler. The oil level is is in the middle so is correct, only seems to come out on a run and not on idle.

Thoughts on next steps? Is it that it just needs to be sealed, or should oil not coming up that far?

Thoughts appreciated.



djkeev wrote:
You say you lost liters of coolant.

Did you add liters of coolant back in?

A loss of coolant will cause the engine to run warmer.

Dave


Check the plastic for cracks.
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