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damicotile
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Joined: September 16, 2004
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Location: WOODLAND CA.
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 Posted: Sun Jan 31, 2016 3:56 pm Post subject: oil cooler leaking |
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I'm having a problem keeping oil coolers. I am on my 2nd cooler cuz they blow out. I'm not sure if these are just crap coolers or what.
Do they still make OEM VW coolers?
The aftermarket one blow out.
I'm running a 26mm Shadek pump
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'73 SB
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ps2375
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Joined: April 24, 2014
Posts: 2471
Location: Meridian,ID
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| Posted: Sun Jan 31, 2016 4:00 pm Post subject: Re: oil cooler leaking |
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| what weight oil and are the pressure relief pistons and bores in good condition? Do you an oil press gauge, if you do what pressures are you seeing? |
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Howard 111
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| Posted: Sun Jan 31, 2016 4:11 pm Post subject: Re: oil cooler leaking |
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By "aftermarket" do you mean a cooler mounted in a different location, or mounted in the stock location? Do you run an oil filter?
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damicotile
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Joined: September 16, 2004
Posts: 1069
Location: WOODLAND CA.
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| Posted: Sun Jan 31, 2016 4:17 pm Post subject: Re: oil cooler leaking |
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I'm using 20-50 VR1 and the pressure is 60psi cold and 40psi hot.
The OPRV I haven't checked yet but it's a new case and am using the stock pistons and springs.
I am running an oil pressure gauge.
I guess what I am asking is are the oil coolers they sell these days all aftremarkets or can I get a genuine VW part?
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'73 SB
82x94
W-120 w/ CB light weight lifters
Silicon bronze sleeves
Scat 1.25:1
CB H-Beams
Straight cuts
42x37 Steve Tims
44 IDF's
9.2:1
A-1 Sidewinder coated
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damicotile
Samba Member
Joined: September 16, 2004
Posts: 1069
Location: WOODLAND CA.
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| Posted: Sun Jan 31, 2016 5:10 pm Post subject: Re: oil cooler leaking |
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I mean the stock dog house cooler. Are they all aftermarket or can I source a genuine VW cooler some where?
I'll call the dealership tomorrow to see if they have one.
_________________
'73 SB
82x94
W-120 w/ CB light weight lifters
Silicon bronze sleeves
Scat 1.25:1
CB H-Beams
Straight cuts
42x37 Steve Tims
44 IDF's
9.2:1
A-1 Sidewinder coated
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vwracerdave
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Joined: November 11, 2004
Posts: 15297
Location: Deep in the 405
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| Posted: Sun Jan 31, 2016 5:43 pm Post subject: Re: oil cooler leaking |
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Try some 10W-30 oil.
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ps2375
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Joined: April 24, 2014
Posts: 2471
Location: Meridian,ID
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| Posted: Sun Jan 31, 2016 6:30 pm Post subject: Re: oil cooler leaking |
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| VW doesn't make anything for these cars anymore. And a lighter weight oil would sure reduce system internal pressure spikes and might even help it run cooler. |
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Howard 111
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Location: Virginia
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Howard 111
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bluebus86
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Joined: September 02, 2010
Posts: 11075
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| Posted: Mon Feb 01, 2016 8:31 pm Post subject: Re: oil cooler leaking |
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That is not an OEM cooler you have linked too above, and for the price for an aftermarket one you can do a lot better....
aircooled.net = $70
http://vwparts.aircooled.net/Oil-Cooler-Doghouse-1971-Upright-Engines-p/113-117-021.htm
AutoHaus AZ = $65
http://www.autohausaz.com/search/product.aspx?sid=...l%20Cooler
Texas Aircooled = $49
http://www.texasaircooled.com/catalog/Doghouse-Style-Oil-Cooler.html
German Supply.com = $43
http://www.germansupply.com/home/customer/product.php?productid=17691
Even an aftermarket cooler should not be failing like this unless something is really wrong. 2 for 2 is a bad run, if it was a batch of bad coolers, you would likely not be the only one experiencing this. have you contacted the seller about this problem?
where is the leak occurring? (photo would be very helpful)
You can pressure test the cooler prior to install, not hard to do.
If your gage is accurate, the pressure you have should not be blowing out coolers.
Is it possible cooler was damaged prior to running the motor?
Although 20W-50 oil is on the thick end that should not be blowing coolers, I have run 20W-50 on dog house and standard VW engines with no problems, be it in snow or desert heat.
what vendor did you get these two failed coolers from?
are they brand new or used?
A stuck control valve could cause a huge pressure spike, but if your gage is hooked up to the stock oil sender location, it should register that pressure spike, however if you have a fully mechanical gage, with a long run of small diameter tubing to the gage, you may be seeing a false low pressure readout. if the gage is an electrical one with sender, then your likely seeing the actual pressure.
So is the gage you are using an electrical one or a mechanical one with a long run of narrow diameter tubing? If a mechanical one with a long thin run of oil tubing, then you may still have an oil control valve issue, (ie pressure spike) but you cant see it because the gages long run of tubing is causing a drop in pressure to the gage.
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damicotile
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Joined: September 16, 2004
Posts: 1069
Location: WOODLAND CA.
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| Posted: Mon Feb 01, 2016 9:36 pm Post subject: Re: oil cooler leaking |
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It's a mechanical gauge. And it's run off the stock location plus I have the idiot light still hooked up.
Bugformance gave me a new one.
I'll put it together tomorrow and check the gauge against another gauge.
Could just be a run of bad luck.
I'll check the OPRV's too.
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'73 SB
82x94
W-120 w/ CB light weight lifters
Silicon bronze sleeves
Scat 1.25:1
CB H-Beams
Straight cuts
42x37 Steve Tims
44 IDF's
9.2:1
A-1 Sidewinder coated
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bluebus86
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Joined: September 02, 2010
Posts: 11075
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| Posted: Mon Feb 01, 2016 9:58 pm Post subject: Re: oil cooler leaking |
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| damicotile wrote: |
It's a mechanical gauge. And it's run off the stock location plus I have the idiot light still hooked up.
Bugformance gave me a new one.
I'll put it together tomorrow and check the gauge against another gauge.
Could just be a run of bad luck.
I'll check the OPRV's too. |
hers the thing with the gage with a long run of thin tubing. the cold oil in the tubing will offer a lot of resistance to flow and thus you wont get an accurate pressure reading, it will be very slow to respond, so if you have a pressure spike, say on a ice cold day, and you rev the motor with thick cold oil, you may never see that the pressure spikes to say 180 psi (say because the pressure control valve is stuck for example).
I have one Bug that has a 1/8 inch tube (outside diameter) all the way up to a dash gage, it is supper slow to respond, and it will miss a pressure spike that is quick, heck it holds pressure for a long time after engine is shut down! also in hard cornering when the oil can slosh to one side of the sump leaving the pick up tube sucking air, this gage set up will not always show the sudden drop in pressure, before the oil is sloshed back tot eh pick up tube. On my other car the gage is electric and can sense even brief drops (or spikes) in pressure, if my oil level is a little low and I corner or brake hard this gage will alert me to that.
Thus is you run a mechanical gage all the way up to the dash form the rear of car,you need a fairly fat tubing, 1/4 inch or such. you can get way with a thinner tube if the length is short like on a front engine car to dash, but our engines are all the way in back.
at anyrate, check your relief springs and piston clearance on both valves, if either one sticks along with thick cold oil and a reving motor even a good cooler could be blown out.
if you don't care to install a fat oil line or convert to an electric gage, you could as temporary measure install a mechanical gage right on the block at the oil pressure sender port and test the pressure, cold motor, reving with thick oil, if you see a pressure spike, find out why. don't bandaid a stuck relief valve with thin oil , find out for sure if the two relief valves are working right.
Good Luck
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jason
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Joined: August 07, 2002
Posts: 3445
Location: Garage
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| Posted: Mon Feb 01, 2016 10:56 pm Post subject: Re: oil cooler leaking |
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| Is that the pressure at idle? |
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bluebus86
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Joined: September 02, 2010
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| Posted: Tue Feb 02, 2016 2:02 pm Post subject: Re: oil cooler leaking |
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Also the cooler can be damaged if it is not correctly installed, make sure torque specification is followed when installing, or is incorrectly cooling shrouds was allowed to rub on the cooler and wear thru. not saying that is the cause but something to keep in mind.
can you describe where the leak occurred on the cooler?
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Bruce
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Joined: May 16, 2003
Posts: 17284
Location: Left coast, Canada
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| Posted: Tue Feb 02, 2016 2:32 pm Post subject: Re: oil cooler leaking |
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| damicotile wrote: |
| I'm using 20-50 VR1 and the pressure is 60psi cold and 40psi hot. |
This is your problem. You shouldn't be using that tar, it causes excessive oil pressure, and high oil pressure is bad. Try any xW-30 oil.
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damicotile
Samba Member
Joined: September 16, 2004
Posts: 1069
Location: WOODLAND CA.
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| Posted: Tue Feb 02, 2016 6:27 pm Post subject: Re: oil cooler leaking |
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i have it all together and running. The OPRV's are all nice and free. I put in 10/30 VR-1 and the pressure dropped to 55cold.
I built this car for my son and he has been maintaining it.
I didn't,t know he was using such a thick brew.
It's running now and time will tell. Thank for all the help.
Guido
_________________
'73 SB
82x94
W-120 w/ CB light weight lifters
Silicon bronze sleeves
Scat 1.25:1
CB H-Beams
Straight cuts
42x37 Steve Tims
44 IDF's
9.2:1
A-1 Sidewinder coated
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