Cruisers & Sailing Forums (http://www.cruisersforum.com/forums/)
-   Our Community (http://www.cruisersforum.com/forums/f129/)
-   -   Slow cranking only when hot. (http://www.cruisersforum.com/forums/f129/slow-cranking-only-when-hot-180693.html)

rubino 26-02-2017 11:33

Slow cranking only when hot.
 
My Volvo 2003 starts 100% when cold. Slow cranking 30% of the times after warm up.Does exist voltage drop only with hot engine ? The connections look good . The starter motor does not have a negative wire its chassis act as negative ( I am planning to add a negative wire) .
It is five years that I endure this bother .
Thanks..please help.

GRIT 26-02-2017 11:42

Re: Slow cranking only when hot.
 
It's likely your starter windings. Try having your starter rebuilt.

Cheers.
Paul.

jamhass 26-02-2017 11:55

Re: Slow cranking only when hot.
 
When you say slow cranking, do you mean slow starter rpm or it takes longer to start?

On our 2003t, cold start using the cold start procedure starts immediately. Warm engine starts without the cold start procedure takes longer. With the procedure, starts quickly.

DeepFrz 26-02-2017 12:04

Re: Slow cranking only when hot.
 
Clean and tighten all connections between your starter and the start battery, including ground cable connections before you do anything else. Its possible that your starter needs servicing but do the simple things first.

rubino 26-02-2017 23:22

Re: Slow cranking only when hot.
 
Thus I will : 1st) re-clean and re-tighten all connections , 2nd) add a -wire from the starter chassis to the engine block (a logic = hot engine and its contact with the starter chassis ),3rd) give a try with a new starter+solenoid.
Thank you all.:confused::confused::confused:

Kita 27-02-2017 08:32

Re: Slow cranking only when hot.
 
Quote:

Originally Posted by rubino (Post 2334764)
Thus I will : 1st) re-clean and re-tighten all connections , 2nd) add a -wire from the starter chassis to the engine block (a logic = hot engine and its contact with the starter chassis ),3rd) give a try with a new starter+solenoid.
Thank you all.:confused::confused::confused:

I think there was a misunderstanding, starter as you said is grounded to engine, I think they mean ground from engine & starter to battery ground or neg side of battery & it needs to be a battery cable with good connection as in not on paint on the engine ...

skipmac 27-02-2017 08:58

Re: Slow cranking only when hot.
 
Quote:

Originally Posted by DeepFrz (Post 2334406)
Clean and tighten all connections between your starter and the start battery, including ground cable connections before you do anything else. Its possible that your starter needs servicing but do the simple things first.

:thumb:

Always try the easy, simple cheap fix first just in case. If cleaning and tightening ALL the connections (don't forget to check the battery ends as well) then very possibly the starter needs work. Happened to me on a previous boat. Started fine cold but hot the starter couldn't turn over the engine. Rebuilt starter, problem solved.

Kita 27-02-2017 09:01

Re: Slow cranking only when hot.
 
Quote:

Originally Posted by skipmac (Post 2335084)
:thumb:

Always try the easy, simple cheap fix first just in case. If cleaning and tightening ALL the connections (don't forget to check the battery ends as well) then very possibly the starter needs work. Happened to me on a previous boat. Started fine cold but hot the starter couldn't turn over the engine. Rebuilt starter, problem solved.

Spot on! :thumb:

skipper53 27-02-2017 09:02

Re: Slow cranking only when hot.
 
If the engine is turning over more slowly when warm, I would suspect an engine wear problem......Hot engine internal parts -- rod bearings, crank bearings etc., might be creating more friction than when the engine is cold.

Cadence 27-02-2017 09:04

Re: Slow cranking only when hot.
 
Look at the bright side. Is it possible you are experiencing better compression when hot. You said, I believe, no starter ground wire which is normal. Check the neg. lead to your block.

Aaarrgh 27-02-2017 09:13

Re: Slow cranking only when hot.
 
Engine timing needs to be checked.

Vortec 27-02-2017 19:44

Re: Slow cranking only when hot.
 
Quote:

Originally Posted by Cadence (Post 2335090)
Look at the bright side. Is it possible you are experiencing better compression when hot...

I agree with Cadence. Last year I rebuild a VP D1 20B and it starts slightly easier cold than warm. It's a question of 1 crank cold and mayby 1 1/2 rev hot. ⛵

Siberian Sea 01-03-2017 09:12

Re: Slow cranking only when hot.
 
Very good chance the starter is worn out. When it's cold the motor contacts are close but once it's hot the gap becomes larger and the starter looses power.

a64pilot 01-03-2017 09:47

Re: Slow cranking only when hot.
 
Quote:

Originally Posted by skipper53 (Post 2335089)
If the engine is turning over more slowly when warm, I would suspect an engine wear problem......Hot engine internal parts -- rod bearings, crank bearings etc., might be creating more friction than when the engine is cold.

Could be I guess, but with about 40 years as a mechanic I have never seen it

Quote:

Originally Posted by Aaarrgh (Post 2335096)
Engine timing needs to be checked.

Now this could well be it if nothing else fixes it, too advanced timing will certainly make one spin slower during starting.

Cadence 01-03-2017 10:53

Re: Slow cranking only when hot.
 
Could be I guess, but with about 40 years as a mechanic I have never seen it

I would have to agree with that. An engine with wear may take longer to start but not turn slower but faster in order to achieve compression.


All times are GMT -7. The time now is 06:10.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.