I guess it could be leaking through where the timing case mates up to the block? Was all the old gasket removed from the timing case and block? Or perhaps the timing case has a pin hole in it due to corrosion?
253 leaking water into oil
Started by
_Kal05_
, Apr 06 2012 11:49 AM
48 replies to this topic
#26
hanra
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Posted 06 April 2012 - 08:22 PM
#27
_Kal05_
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Posted 06 April 2012 - 08:35 PM
That's a possibility. I will do the compression and pressure tests and if they are all good then I will start to pull it apart and check
#28
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Posted 06 April 2012 - 08:44 PM
Bit of a shit to pull the timing case off with the motor in... Kinda need to take the sump off to refit it all 100%.
#29
TerrA LX
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Posted 06 April 2012 - 08:58 PM
Timing cover R&R piece of cake on holden V8 with engine insitu.
#30
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Posted 06 April 2012 - 09:00 PM
Yeah I know but it can be done, I will give it a go rather then pull the engine again, it was a bitch to get in lol
#31
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Posted 06 April 2012 - 09:03 PM
I did have the front cover off to adjust the timing chain so maybe it didn't seal properly when I put it back on, wouldn't have thought it would get into the oil from there though
#32
_Liam_
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Posted 06 April 2012 - 09:18 PM
Sounds like a Head gasket to me, probably not torqued properly, or it's split.
#33
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Posted 06 April 2012 - 09:20 PM
I think you know what the problem is.
Is is an easy job, but you have to take your time and not cut corners like removing the front seal first, leaving the front seal on and trying to force in place to get the bolts in would be one thing that can cause grief..
Is is an easy job, but you have to take your time and not cut corners like removing the front seal first, leaving the front seal on and trying to force in place to get the bolts in would be one thing that can cause grief..
#34
_Kal05_
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Posted 07 April 2012 - 08:04 AM
I know the front cover is the problem with it leaking out but I would have thought that's how the water was getting into the oil, anyway investigations start today
#35
_trna76hb_
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Posted 07 April 2012 - 01:32 PM
Did you seal the head bolts when putting on the heads????
Ian
Ian
#37
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Posted 07 April 2012 - 03:09 PM
Out of curiosity, which head bolts go into water jackets?
#38
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Posted 07 April 2012 - 05:21 PM
Out of curiosity, which head bolts go into water jackets?
From memory all bolts bar three on the inlet manifold side.
#39
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Posted 09 April 2012 - 08:24 PM
Thats interesting that they designed the motor this way?
This cross section dosnt seem to help.
This cross section dosnt seem to help.
#40
_Kal05_
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Posted 14 April 2012 - 09:34 PM
Thanks for All the replies, just had the heads tested and they came back all ok. So at this stage I'm working on the assumption that it must have been a bolt that didn't seal or a gasket. See how it goes when I re assemble it later in the week
#41
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Posted 14 April 2012 - 09:36 PM
Also my 253 has been bored to 30 thou and it has L34 heads, the rest is standard. I know it is no longer 253 but Can anyone tell me what size it would be now?
#43
_Kal05_
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Posted 14 April 2012 - 10:57 PM
Yeh... I was actually asking how many more cubes those mods would give me? Just after a rough idea
#44
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Posted 15 April 2012 - 09:14 AM
257 cubic inch.
The big valves might knock some torque out of it.
The big valves might knock some torque out of it.
#45
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Posted 22 April 2012 - 08:33 PM
Thanks to everyone for the help. I have the motor running now and no signs of water, looks like it was just the bolts not sealing
#46
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Posted 22 April 2012 - 08:35 PM
Which bolts?
#47
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Posted 22 April 2012 - 09:07 PM
I'm guessing the Head Bolts Brad
They gotcha worried mate?
They gotcha worried mate?
#48
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Posted 23 April 2012 - 06:16 AM
Yes all bolts were sealed
Well I thought he had sealed all his bolts? I didn't seal the ones for the timing case/water pump.
#49
_Kal05_
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Posted 23 April 2012 - 05:58 PM
Yeah I put permatex on the head bolts the first time, wich I was told would be fine, this time I used proper gm sealant and that seems to have solved the problem
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