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Old 12-08-2014, 10:52 PM
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Question '03 5.7 LTR Pressure Regulator

I have a 197 with a 5.7 LTR Indmar GM Vortec. Can I buy the fuel pressure regulator at the auto store...part number, store. What is the bar pressure for regulator...anybody know what year Gm motor I would be looking at...fuel injected motor.

The fuel pressure regulator is located on the right side of the motor on the fuel injector rail.

also will be replacing knock sensor due to corrosion, I see that can be replaced, look for number on part, would it be the same for pressure regulator? thanks

Last edited by Fullpass; 12-11-2014 at 06:09 AM.
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Old 12-14-2014, 11:56 AM
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The Indmar P/N for that regulator is 556125. It is a vacuum actuated 3 Bar regulator ... approx. 45 PSI.
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Old 01-10-2015, 09:01 PM
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Thanks for the information Engine Nut
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Old 01-10-2015, 09:28 PM
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I believe this will work as well. http://www.napaonline.com/Catalog/Ca...732_0462420664

kit available at most auto parts stores...
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Old 01-10-2015, 10:03 PM
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Quote:
Originally Posted by mikeg205 View Post
I believe this will work as well.

http://www.rockauto.com/dbphp/x,cata...CTS_PR286.html

search these part numbers you can prolly sourced locally...

PR286, PR234, PR92T, PR216T, PR105T

http://www.napaonline.com/Catalog/Re...0012%2b2012030


kit available at most auto parts stores...
about 25% of the cost at a marine parts store...
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Old 06-09-2015, 08:46 PM
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2003 INDMAR 5.7 LTR 330 hp 3 bar 45psi fuel pressure regulator ALTERNATIVE REPACEMENT PART#: OEM GM 17089203 (EXACT REPLACEMENT), NAPA #: CRB 219613, reference engine for parts ~ 1994 Cadillac Deville 4.6L 281 NOT THE 4.9L

Last edited by Fullpass; 06-12-2015 at 08:45 PM.
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Old 07-17-2017, 03:49 PM
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Quote:
Originally Posted by Fullpass View Post
2003 INDMAR 5.7 LTR 330 hp 3 bar 45psi fuel pressure regulator ALTERNATIVE REPACEMENT PART#: OEM GM 17089203 (EXACT REPLACEMENT), NAPA #: CRB 219613, reference engine for parts ~ 1994 Cadillac Deville 4.6L 281 NOT THE 4.9L
@Fullpass - Same part for a 2000 XStar 5.7L 330HP LTR? I suspect so but wanna double check.

Thanks!
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Old 07-17-2017, 04:56 PM
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Old 07-17-2017, 06:22 PM
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Maybe you guys can point me in the right direction here, but on my year 2000 LTR where the fuel pressure regulator should be there is something that looks like a regulator, but there is no fuel return line going anywhere. What is it doing? It doesn't seem like it could regulate fuel pressure since there is no return line to the tank.
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Old 07-17-2017, 08:34 PM
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Quote:
Originally Posted by Cumminscj View Post
Maybe you guys can point me in the right direction here, but on my year 2000 LTR where the fuel pressure regulator should be there is something that looks like a regulator, but there is no fuel return line going anywhere. What is it doing? It doesn't seem like it could regulate fuel pressure since there is no return line to the tank.
I've spent the last couple years researching this, what your seeing is in fact the GM fuel pressure regulator. If there is no return line attached it has a plug installed in the port where the fuel line would go. (Bottom of reg.) In this case the regulator does nothing. Indmar just left it there to plug the hole in the fuel rail. I am surprised that you have a 2000 model year with a returnless system. According to indmar, early production 1999 LTR was returnless. Late 1999-2000 began utilizing the return. This continued until end of production for the LTR.
In my endless research, yours will be the first and only 2000 model year LTR that I have come across that did not have a return. That's interesting. If you would be willing to PM me your hull# and engine serial# I'd love to research that a bit.
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