 SS Heat Exchanger Install question |
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| RustyWa |
 Apr 21 2003, 11:29 PM
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#1
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Working Member  Group: Members Posts: 610 Joined: 2-January 03 From: Kent, WA Member No.: 72  |
I'm assuming no washers are needed with these nuts?
Also, is it common practice to take a file to the inlets of the SS heat exchanger tubes before installation? I don't have a large file, so just wondering if I need/should buy one. Any other recommendations are welcome. Attached image(s) 
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Replies(1 - 9)
| ChrisReale |
Apr 21 2003, 11:36 PM
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#2
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
I dont think you need washers, but I put some on mine just for shits and giggles. Sandpaper on a cutting board works the same as a file. Color the tops of the exchangers with a sharpie pen, and sand away until its all gone. Torque the nuts to 15lbs, use fresh copper gaskets and RTV high temp silicone. Tighten in a cross pattern, similar to lug nuts on wheels.
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| Brad Roberts |
Apr 21 2003, 11:36 PM
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#3
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
No washer.
If your installing used SSI's then.. take a large metal file to them. They are however prefectly straight out of out the box. Make sure you get your old exhaust gaskets out of the heads. Install the new ones with orange high temp silicon on both sides. This will help hold them into the heads while you place the HE up to them. It will make a mess, but you cant see it and they will be sealed nicely the FIRST time...LOL B |
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| Bleyseng |
Apr 22 2003, 09:20 AM
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#4
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Don't tighten the HE nuts down until you install the muffler and hanger. You need to wiggle everything to get it all to fit right. Then tighten all the nuts.
Geoff |
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| Drums66 |
Apr 22 2003, 10:34 AM
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#5
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
no washer and no silicone, sealed just fine everytime. one of the best nut's for the job! (IMG:style_emoticons/default/cool.gif)
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| RustyWa |
Apr 22 2003, 01:34 PM
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#6
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Working Member Group: Members Posts: 610 Joined: 2-January 03 From: Kent, WA Member No.: 72 |
Thanks everyone!
Were there other companies making SS heat exchangers other than SSI? If so, how can you tell the differences? Yep, mine are used. |
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| SirAndy |
Apr 22 2003, 01:41 PM
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#7
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(RustyWa @ Apr 22 2003, 11:34 AM) If so, how can you tell the differences? Yep, mine are used. if they are not cracked on the welds, they are SSI (IMG:style_emoticons/default/wink.gif) |
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| Brad Roberts |
Apr 22 2003, 03:24 PM
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#8
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Nobody made 914 4cyl 1.7/1.8 and 2.0's SS HE's except SSI.
Andy..they do crack around the U shaped mounting tabs when people overtighten them after ADDING a gasket to the head... ending with 2 of them. People send them in from time to time to have them re-jigged and welded. B |
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| SirAndy |
Apr 22 2003, 04:43 PM
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#9
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Brad Roberts @ Apr 22 2003, 01:24 PM) Andy..they do crack around the U shaped mounting tabs when people overtighten them after ADDING a gasket to the head... ending with 2 of them. i tought that was only when the gasket wasn't placed right ? |
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| Brad Roberts |
Apr 22 2003, 04:46 PM
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#10
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
They can do that also. If the gasket falls out of the head while they are placing them up to the head... they can crush the gasket incorrectly and then overtighten and crack.
Bottom line is: They fit every time if you take your time. B |
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