Cleaning the "inside" of heat exchangers |
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Cleaning the "inside" of heat exchangers |
Cazz |
Jan 21 2018, 05:12 PM
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#1
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Newbie Group: Members Posts: 13 Joined: 22-December 16 From: NC Member No.: 20,688 Region Association: None |
Just bought a 73 914. Previous owner has resealed the engine. No noticeable oil leaks. Also the outside of the heat exchangers are very clean.
Problem: The inside of the heat exchangers have oil in them. When the engine gets hot tons of smoke comes bellowing out of the heat exchangers. You can actually hear the oil crackling and burning. Is there anyway to clean all of this oil out of the "inside" of the heat exchangers without taking them off the car or will this car always smoke with these on the car |
toolguy |
Jan 21 2018, 05:31 PM
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#2
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Senior Member Group: Members Posts: 1,267 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
Take them to a radiator shop and have them hot tank 'ed
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914Sixer |
Jan 21 2018, 06:01 PM
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#3
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914 Guru Group: Members Posts: 8,870 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Hot tank is a great idea!
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saigon71 |
Jan 21 2018, 08:16 PM
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#4
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Senior Member Group: Members Posts: 1,997 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Don't know how to clean them while on the car.
If you pull them, I've had great results with Easy Off oven cleaner and the high pressure wand at the car wash. |
rjames |
Jan 22 2018, 01:42 PM
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#5
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I'm made of metal Group: Members Posts: 3,913 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
Take them to a radiator shop and have them hot tank 'ed (IMG:style_emoticons/default/agree.gif) Probably charge you about $50 and you be certain they're clean inside & out and you won't have to worry about chemical disposal. |
johnhora |
Jan 22 2018, 03:59 PM
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#6
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
If you don't want to remove the HEs...then try first by taking the heater hoses off the HEs...then run a garden water hose inside of each HE and run water thru them to rinse the oil out....use some detergent in a spay bottle to help with the oil...since you're in NC and not CA the epa won't have any trouble with your run off....maybe worth a try?
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mepstein |
Jan 22 2018, 04:20 PM
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#7
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914-6 GT in waiting Group: Members Posts: 19,238 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
If you don't want to remove the HEs...then try first by taking the heater hoses off the HEs...then run a garden water hose inside of each HE and run water thru them to rinse the oil out....use some detergent in a spay bottle to help with the oil...since you're in NC and not CA the epa won't have any trouble with your run off....maybe worth a try? That's what I would do if the oil in in the air box section. |
VaccaRabite |
Jan 24 2018, 08:55 AM
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#8
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En Garde! Group: Admin Posts: 13,423 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
When you do it MAKE SURE no water end up coming out of the pipe for the exhausts.
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johnhora |
Jan 24 2018, 09:56 AM
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#9
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
vacca...not sure what you are asking...
but if you want to do this while the HEs are on the car... 1: remove the heater parts from the HE 2: You now have a BIG U (yellow) 3: take a garden hose and put in the HE at the red arrow 4: turn on the water.....water and oil will come out the HE at the green arrow (can use red or green in reverse) 5: use all safety measures and gear to not get wet or hurt |
rjames |
Jan 24 2018, 04:52 PM
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#10
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I'm made of metal Group: Members Posts: 3,913 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
QUOTE since you're in NC and not CA the epa won't have any trouble with your run off no, but people against polluting in general would. (IMG:style_emoticons/default/dry.gif) |
VaccaRabite |
Jan 25 2018, 08:42 AM
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#11
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En Garde! Group: Admin Posts: 13,423 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
vacca...not sure what you are asking... but if you want to do this while the HEs are on the car... These things are famous for having the exhaust pipes crack inside the air jackets where you can't see them. So if you flood the air jacket and water comes out the exhaust pipe, that means you have a leak venting raw exhaust into your cabin. No a good thing! Zach |
malcolm2 |
Jan 25 2018, 09:26 PM
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#12
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Advanced Member Group: Members Posts: 2,738 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
QUOTE since you're in NC and not CA the epa won't have any trouble with your run off no, but people against polluting in general would. (IMG:style_emoticons/default/dry.gif)The oil was heading to the ground some years ago, but the HE caught it. (IMG:style_emoticons/default/smile.gif) |
euro911 |
Jan 25 2018, 09:54 PM
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#13
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,845 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
Pull them so you can verify there are no cracks or holes in the actual exhaust pipes, especially if they're stainless steel HEs.
You can perform this test by pressurize each pipe, or pulling a vacuum through each pipe to verify they're is no leakage ... then spend the money to have them hot tanked as previously mentioned. Peace of mind is a wonderful thing (IMG:style_emoticons/default/idea.gif) |
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