SwedeSpeed - Volvo Performance Forum banner
1 - 8 of 8 Posts

·
Registered
Joined
·
911 Posts
Discussion Starter · #1 ·
My coolant system just can't seem to catch a break...and now it's causing an issue I really don't like the sound of.<p>In an attempt to source the phantom coolant leak(s) that I've been experiencing, I've been replacing a hose here and an o-ring there and then today, I left the car with my Volvo tech to observe overnight to see if he would notice anything out of the ordinary. I got a call about twenty minutes ago and they were observing the coolant seeping out of about a half dozen, pin-sized holes on the back side of the block! <p>Has anyone observed something like this? Are there any steps that can be taken short of replacing the engine? No noticeable loss in performance; no coolant in the oil.<p>I'm fearing the worst here guys...<p>
 

·
Registered
Joined
·
7,614 Posts
That sounds an awful lot like the block porosity issues they had way back in the early 90's on the whiteblock 960, but I thought that was just a very large batch of bad castings, and that they had solved it.<p>Maybe at least research that issue and see if anyone had a fix for it that didn't include replacing the block. It should be all over google. <p>I hope it's not that, just saying it sounds like that.
 

·
Registered
Joined
·
911 Posts
Discussion Starter · #3 ·
Re: (LloydDobler)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>LloydDobler</b> »</i></TD></TR><TR><TD CLASS="quote">That sounds an awful lot like the block porosity issues they had way back in the early 90's on the whiteblock 960, but I thought that was just a very large batch of bad castings, and that they had solved it.<p>Maybe at least research that issue and see if anyone had a fix for it that didn't include replacing the block. It should be all over google. <p>I hope it's not that, just saying it sounds like that.</TD></TR></TABLE><p>It intersting that you say that because I was thinking the same thing. And now that I'm reading about it...this has got to be it. I wonder if others have experienced this porosity problem on any of the more recent blocks. What could cause something like this? I always have my car services by Gorges Volvo and I've never used a coolant other than Volvo coolant.<p>Didn't they use some sort of block "cement" to remedy these problems in the past?<BR><BR>
<i>Modified by thesternowl at 6:25 PM 4-21-2009</i>
 

·
Registered
Joined
·
7,614 Posts
What caused it on the 960's was defective castings. The core was out of position or something, so the walls were too thin right from the foundry. <p>If it is the same thing, it's a manufacturing defect, and it is definitely not common, nor is it anything you did. Maybe go to a dealer and see if there was any recall action on yours. If you're lucky it'll be one of those 10 year warranty kind of deals.
 

·
Registered
Joined
·
911 Posts
Discussion Starter · #5 ·
Re: (LloydDobler)

You can bet that I'm working every conceivable angle that I can right now.
 

·
Registered
Joined
·
911 Posts
Discussion Starter · #6 ·
Re: (thesternowl)

Well...no dice on the patch-up job. <p>The only alternative that was given to me was to replace the motor. <p>I was quoted anywhere from $3000 to $8000 for a replacement. <p>In my mind, it's just not worth it.<p>I guess I'll be driving this sucker around, topping off the coolant level every 4 to 6 weeks until I start to experience problems...
 

·
Registered
Joined
·
430 Posts
New to the S90 world...I was having a slow coolant leak and today my mechanic and I were looking for it..(we did a head gasket last week and it was still losing coolant)...and saw seepage at the webs on the side of the block. OUCH...He has worked on high preasure piping and has an epoxy they use to seal pipes that we are going to use. Strip the exhaust side of the block, degreaser ..blast with walnut shells and or glass bead media, and coat the entire side with the epoxy...He had poured some on his driveway and hitting it with a shovel didn't damage it we were able to peel some off the cement driveway but pulled up the driveway too, it seemed to have soaked in so it does flow..we also will supply a slight vacuum to the cooling system in hopes of drawing it into the pores...will let you know how this works...
 

·
Registered
Joined
·
1,453 Posts
I would probably try a silicate solution, like BlueDevil.

It works, but you must follow the instructions exactly. the system MUST be clean or it will not work properly.
Pull the thermostat so it flows freely.
 
1 - 8 of 8 Posts
Top