|
|
|
#1
|
|||
|
|||
Having to replace T-Stat housing
So, I think I've finally tracked down not one, but two leaks in my coolant system on the 84 300TD.
First, the lower hose to the expansion tank isn't making a good seal around the nipple. Second, what I thought was a leak in my new short hose between the water pump housing and the tstat housing is actually a leak in the housing cover. It seems that the aluminum has corroded over the years (did previous owner use babd coolant) and the new tstat gasket never made a good seal. It doesn't leak when the engine is hot, only when it cools down. So I think as the metal and gasket shrink away from each other and there is still pressure in the system, I lose a bit. I've been coming out to puddle underneath my car for the past 6 weeks. With a newborn and a toddler, I haven't had much of a chance to work on the car until this weekend. I'm about to place the call to my dealer to get the part ordered. Any last advice before I do? |
#2
|
||||
|
||||
yeah, how much is that going to cost you???
i got a "new" one from a junkyard through the parts forum here at peachparts. got it from daw_two to be exact. it's worked great for at least six months now. cleaned the heck out of it first and i would recommend that to save some money.
__________________
1985 300D - 1984 Euro 280E AMG Clone (SOLD) - 1978 280CE (SOLD) - 1983 300D (SOLD) - 1981 300D (SOLD) |
#3
|
||||
|
||||
Pretty easy job, just swap it out. I would recommend going the used/junkyard route as well, just to save money. I just replaced my tstat, water pump, associated housings and hoses this weekend so if you have questions I probably have answers fresh in my mind.
Oh one other thing to remember - get new bolts. Old ones corrode/weaken and I had two snap off on me yesterday. Also, the thermostat gaskets are a compression-type gasket so don't reuse the old one.
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#4
|
|||
|
|||
New housing ordered from MBZ. Being shipped in from Germany. $220. Also order the gasket (obviously) and two bolts/washers that attach it to the head.
I don't have time to go junkyard diving right now. And I need to make sure that the part I buy is 100%. I don't want uneven gasket surfaces again. Or old aluminum that has the possibility of corroding soon. I know it's a straightforward job, pulling the old unit off the other day was fairly easy. |
#5
|
|||
|
|||
Whew! Alum sure is pricey!
__________________
82 240D Manual 277K and still rolling! 02 Volvo S60 AWD For Sale |
#6
|
|||
|
|||
The T-stat housings on both of my 300D's were pretty badly corroded, to the point of leaking quite a bit. I just carefully applied some thermostat housing sealant (being careful not to cover that little hole). That worked fine for me.
Is there any particular reason not to go that route?
__________________
84 300D 255K "Mr B" ("Mr Becker") 79 300D 265K "Mrs B" 85 300TD 175K "Mali" (Sold) 74 Ford F-100 74K "Bonnie" (Sold) 67 Jeepster Commando (Sold) |
#7
|
||||
|
||||
Quote:
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#8
|
||||
|
||||
yes, the housing bolts to the right hand side of the head and also connects to the small length of hose. It also houses the blower fan temp switch anf the vacuum temp switch for the egr.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#9
|
|||
|
|||
I agree that would be a far less expensive fix and is a valid answer to my initial question, but I'd rather spend the $$ to fix it for good.
The hose flanges were fairly corroded as well. I just don't trust the part. I know Loctite has a good RTV waterpump & thermostat housing sealant. I would just have a hard time trusting it versus a proper metal/gasket/metal. How many others are using sealant to make up for problems with the old housing? Is this more prevalent that I presume? |
#10
|
||||
|
||||
Quote:
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#11
|
|||
|
|||
Quote:
__________________
84 300D 255K "Mr B" ("Mr Becker") 79 300D 265K "Mrs B" 85 300TD 175K "Mali" (Sold) 74 Ford F-100 74K "Bonnie" (Sold) 67 Jeepster Commando (Sold) |
#12
|
||||
|
||||
I just wanted to open this thread again. Does anyone happen to have a thermostat housing available for sale? PM if so, thank you.
__________________
1985 300SD - 167k miles 1992 F350 7.3 (Soon to be converted to 2 tank Veggy/WMO) |
#13
|
||||
|
||||
Post a WTB in the parts section.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#14
|
|||
|
|||
I bet that I know exactly why you need one !!!! Couple of busted off 10mm bolts per chance ?
|
#15
|
||||
|
||||
Negative, good guess though.
__________________
1985 300SD - 167k miles 1992 F350 7.3 (Soon to be converted to 2 tank Veggy/WMO) |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|