Dave in Texas Posted October 19, 2008 Report Share Posted October 19, 2008 I'm replacing my engine with a reman and replacing old pieces. Two of the pieces I need to replace are the 3" green-color silicone hoses that connect coolant piping. I've found that RockAuto has the hose, but they require buying 25 of the 3" pieces at $7/piece.....! Being a poor old man, I can't afford $180+ for some hose. I'm wondering if using 3/4" heater hose is a good substitute or some other type of flexible hose/piping? I wonder why silicone hose is used.....? Thanks for any advice, I appreciate the help. GM Reman 4.1 engine Dec '08 Link to comment Share on other sites More sharing options...
growe3 Posted October 19, 2008 Report Share Posted October 19, 2008 You need to replace these silicone heater hoses with the same kind. They are close to the EGR valve, and they get a LOT of heat on them, plus the normal very hot coolant in them. If the old ones clean up OK, with no cracks or cuts, I would use the original ones. (at well over 200k miles, mine are still in great shape.) If you feel that you must replace them, just get them from the dealer; gotta be less than $180 for two of them. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 19, 2008 Report Share Posted October 19, 2008 I agree with George, I did replace mine but the old ones were just fine. They are quite expensive, my memory tells me that they were about $10 each. or more, I can't remember exactly. Do one thing however, if you don't replace the hoses, when you tighten the clamps, make sure you face the screw so that it will be easier to get at them if you have to. You should replace the hose clamps on those hoses, replace them with clamps screw fasteners that you can use a screw driver AND a small wrench with, so if you have to get them off, you have options. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Ranger Posted October 19, 2008 Report Share Posted October 19, 2008 I wonder why silicone hose is used.....? Because as mentioned they are more heat resistant and due to the difficulty in getting at them, GM (fortunately) decided to use something durable. Link to comment Share on other sites More sharing options...
Dave in Texas Posted October 19, 2008 Author Report Share Posted October 19, 2008 ok, thanks for the advice. I loath buying anything from 'the dealer'.... Each section looks good, but them being 21+yrs of age....One of the sections connects piping that runs under the engine, while the other is in a much different enviroment.....under the LF exhaust manifold. I may just swap those sections and carry some heater hose in the trunk. I'll check locally for 3/4" silicone hose.....maybe some other cars use it too. GM Reman 4.1 engine Dec '08 Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 19, 2008 Report Share Posted October 19, 2008 I would NOT use standard hose in that location Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
MrEldo97 Posted October 19, 2008 Report Share Posted October 19, 2008 Use the GREEN SILICONE HOSES! As others have posted there is too much heat in that area to use anything other than that green silicone material. I replaced mine when I Timeserted my block. They are expensive (I recall about $24.00 each from my local dealer) because of the material. Call Brasington Cadillac in Gainesville, FL and they'll set you up with what you need at a reasonable price. Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 19, 2008 Report Share Posted October 19, 2008 They were expensive, you are correct, I thought I paid $18, about 3 years ago. But, my feeling was that I was not going to do it again and while I had the crossover off, it was time, I kept the old ones in my tool box Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Dave in Texas Posted October 19, 2008 Author Report Share Posted October 19, 2008 I found green Gates silicone hose locally at $10.50/ft. I'm pretty-sure Gates is the OEM supplier...... GM Reman 4.1 engine Dec '08 Link to comment Share on other sites More sharing options...
MrEldo97 Posted October 20, 2008 Report Share Posted October 20, 2008 In that case give it ashot. Good luck! Link to comment Share on other sites More sharing options...
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