need help with volvo penta 4.3GL thermostat

[curts]

need some help from anyone who has replaced a thermostat on a newer volvo penta engine. (2005).
When I removed the housing from the intake manifold, the thermostat was pushed all the way up into the housing cavity above the lip where there is an o ring. Is this normal?
When I install a new thermostat, where do I place the thermostat and which side of the thermosat does the o ring sit? My Clymer manual is not much help. There is no reference to an o ring at all.

 

[Don S]

Re: need help with volvo penta 4.3GL thermostat

Now you know why I made this.

The thermostat is in correctly, that oring is what holds the stat in.
Install the new one just like the old one is.

 

[njlarry]

Re: need help with volvo penta 4.3GL thermostat

As I learned on this site; the o ring is removed with a couple of awls or thin screw drivers, the thermostat should then come right out, the new o ring goes back in the same way. My seloc was also no help with this common task.
The factory manuals are much better.

 

[curts]

Re: need help with volvo penta 4.3GL thermostat

Thanks, so I take it that the thermostat flange goes up past the o-ring lip, and then place the o-ring on around the lip?

The clymer manual is not even close on this one! Did Volvo/GM redesign this recently?. On my old 3.0 mercruiser, I would just drop the thermostat spring side into the manifold and bolt on the cover.

 

[Don S]

Re: need help with volvo penta 4.3GL thermostat

Remove oring, remove thermostat, put new thermostat in like old one was, install oring.

What clymer manual do you have, for what years?????

 

[curts]

Re: need help with volvo penta 4.3GL thermostat

I have the volvo penta stern drives 2001-2004. The thermostat replacement procedure is either very outdated or maybe they just used the section out of a mercruiser manual. Also there some some pretty awful diagrams showing the coolant system flow.

 

[Don S]

Re: need help with volvo penta 4.3GL thermostat

It's just another case of being Clymered. Wrong information is what they are known for as far as I am concerned. That same thermostat housing has been used since the MD model in 1994.
Get the OEM manuals if you want REAL information.
What if your full engine model number or even an engine SN will help.

 

[curts]

Re: need help with volvo penta 4.3GL thermostat

I finally got some time today to complete this thing. I stuck the thermostat in until the flange rests on the step in the housing, and then worked a new o-ring on top of the flange between the flange and the slight groove in the housing.
Kind of a pain to get the o-ring in position.
See picture. You can see the location of the o-ring on the right side of the picture. I hope this is correct.