Webasto Valves

[Darrell McCarley]

Has this ever happened to anyone else in POG or am I the only dummy in this group? Beginning about 12 mo ago, my 8v92 began to heat up during the Texas summers and western mountains geting up to 195 on level surfaces and 205 in mountains. I changed out the thermostats for $400.00, test drove , no fix. Changed out the radiator at $2200.00. Test drrove, no fix. Changed out the water pump for $400.00, test drove, no fix. Changed out the oil coolers for $1600.00, test drove, no fix. I was clueless on what to do next so I decided to go Stewart & Stevenson to visit with the service manager explaning my overheating problems and the things I had done to try to correct this problem. He said, why don't we take a look. I opened up the rear engine doors and he said, here is your problem right here pointing to a loose radiator fan belt. He could not get me scheduled for several days and suggested that I go to Prevost DFW. The tension air valve release that tightens the fan belt became clogged with a white chrystal like substance from the air system. All of this expense and a complete fix for $37.00 plus Prevost labor. This is not the first time that I have replaced part after part until it is repaired. Anyone have a similiar story?.............Darrell

[dalej]

I take it you did all this before you joined POG

[Jon Wehrenberg]

Darrell,

Why do you think a lot of us have started doing our own work. I'm assuming you paid someone to do all those repairs, and if any of them were either honest or competent they would have alerted you to the lack of belt tension.

BTW, if you think that is bad, take your coach to have someone cure the leans.

[Darrell McCarley]

Dale.......No, after I joined POG. No excuses........Darrell

[Jon Wehrenberg]

Why apologize? It isn't like you did anything wrong. If anyone did anything wrong it is the technicians who screwed up their analysis of the cause.

[Darrell McCarley]

JON....I had the leans several years ago. Went to Prevost for a cure to no avail. Still have a slight case of leans but have learned to live with it......Darrell

[Jon Wehrenberg]

Until Hector really got into it and made his power point program the air suspension systems were a black art.

Today, with the knowledge here, and with the guidance of Hector's power point program there is no need for any POG member to have the leans, or to spend serious dollars getting them cured.

Where is it leaning, what year coach, who is the converter, and I'll bet we can isolate the areas that cause your problem.

[Darrell McCarley]

JON.....That was my problem. I did my own analysis and then had the repair shop do the repairs. Next time, Maybe I will let the professionals do the analysis. On second thought, I will probally do the next analysis myself. Some of us never learn.........Darrell

[truk4u]

Darrell,

Year and conversion like Jon said would help.

[Jon Wehrenberg]

I would agree the techs were blameless except for a couple of things. Maybe they can change the thermostats (2) on an 8V92 without touching the fan belt, but they cannot work in that area for the amount of time required to change the thermostats without noticing belt tension.

I may be wrong but if I was a mechanic and I was asked to replace thermostats, surely I would ask why. It would be unusual for thermostats to fail in such a way as to slowly allow your engine temps to increase.

Then as a mechanic who is both lazy and simple minded, I would start looking for the cause of your symptoms starting with the most basic stuff........like belts and tension.