Merry Christmas from my XJS-Trans hose explosion :-(
#1
Merry Christmas from my XJS-Trans hose explosion :-(
Just a couple of hours ago I was on my was to Mass in my XJS, admittedly, pushing 95 mph on an empty road and suddenly a huge cloud of smoke on my rearview mirror and out of my the sides. I pull over with my fire extinguisher just in case and open her bonnet, red transmission fluid all over the entire front of my engine. All over my brand new fan shroud, brand new cam cover,all over my relays , just all over the engine but mainly in front. I check the level on the tranny and it has gone down but not empty. I baby her home, and no Mass, a dirty engine and a very expensive sports coat with trans fluid stains all over.
I have had both hoses remade and replaced by my mechanic. One of them has already bust once before but at low speed. No drama like today.
Does this sound like one of the hoses again to y'all ?
I have had both hoses remade and replaced by my mechanic. One of them has already bust once before but at low speed. No drama like today.
Does this sound like one of the hoses again to y'all ?
Last edited by Spikepaga; 12-25-2013 at 11:48 AM.
#2
Just a couple of hours ago I was on my was to Mass in my XJS, admittedly, pushing 95 mph on an empty road and suddenly a huge cloud of smoke on my rearview mirror and out of my the sides. I pull over with my fire extinguisher just in case and open her bonnet, red transmission fluid all over the entire front of my engine. All over my brand new fan shroud, brand new cam cover,all over my relays , just all over the engine but mainly in front. I check the level on the tranny and it has gone down but not empty. I baby her home, and no Mass, a dirty engine and a very expensive sports coat with trans fluid stains all over.
I have had both hoses remade and replaced by my mechanic. One of them has already bust once before but at low speed. No drama like today.
Does this sound like one of the hoses again to y'all ?
I have had both hoses remade and replaced by my mechanic. One of them has already bust once before but at low speed. No drama like today.
Does this sound like one of the hoses again to y'all ?
I hope the rest of your Christmas goes better!
#3
What was the hose made out of....
Where did the failure occur?
What hose was used? What clams were used? Transmission cooler hoses should meet SAE J20R3, D1 specifications which are for high temp and pressure hydraulic fluid.
Normal hose clams usually can't handle transmission line pressure for long. consider using oetiker clamps.
What hose was used? What clams were used? Transmission cooler hoses should meet SAE J20R3, D1 specifications which are for high temp and pressure hydraulic fluid.
Normal hose clams usually can't handle transmission line pressure for long. consider using oetiker clamps.
#4
#5
Where did the failure occur?
What hose was used? What clams were used? Transmission cooler hoses should meet SAE J20R3, D1 specifications which are for high temp and pressure hydraulic fluid.
Normal hose clams usually can't handle transmission line pressure for long. consider using oetiker clamps.
What hose was used? What clams were used? Transmission cooler hoses should meet SAE J20R3, D1 specifications which are for high temp and pressure hydraulic fluid.
Normal hose clams usually can't handle transmission line pressure for long. consider using oetiker clamps.
#6
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#8
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Not that I launched an in-depth probe into the matter but I perused several different service manuals (covering various GM, Borg Warner, and ZF tranmissions) I couldn't find any info on what kind of pressures to expect in the cooler line circuit.
My guess is 30 psi. Some Googling indicates others guessing about the same. It might be something that varies a fair bit depending on design but I can't imagine designers/engineers *wanting* an unusually high pressure. No good would ever come from it.
I'm sure more info is out there for someone wanting to dig.
Going out on a limb but I just gotta think that any hose that says "hydraulic use" or "transmission cooler" on it should tolerate 40-50 psi with no problem. Probably more, even without getting into industrial/exotic stuff.
FWIW I've seen umpteen cars with ordinary hose clamps on the cooler hoses. My Ser III XJ6 came that way from the factory, in fact.
Examination of the failed hose should be revealing. A failed crimp is a failed crimp. If the hose itself burst open then that's a different matter, of course.
One thought, a bit premature, is that there might be a restriction in the cooler circuit which would drive pressures higher than intended.
My money's on a faulty crimp.
Cheers
DD
My guess is 30 psi. Some Googling indicates others guessing about the same. It might be something that varies a fair bit depending on design but I can't imagine designers/engineers *wanting* an unusually high pressure. No good would ever come from it.
I'm sure more info is out there for someone wanting to dig.
Going out on a limb but I just gotta think that any hose that says "hydraulic use" or "transmission cooler" on it should tolerate 40-50 psi with no problem. Probably more, even without getting into industrial/exotic stuff.
FWIW I've seen umpteen cars with ordinary hose clamps on the cooler hoses. My Ser III XJ6 came that way from the factory, in fact.
Examination of the failed hose should be revealing. A failed crimp is a failed crimp. If the hose itself burst open then that's a different matter, of course.
One thought, a bit premature, is that there might be a restriction in the cooler circuit which would drive pressures higher than intended.
My money's on a faulty crimp.
Cheers
DD
#10
The trans cooler pipes run along the RH side of the engine under the exhaust manifolds fixed to the block, these are steel pipes. There are 2 flexible hoses from just behind the alternator to the RH side of the radiator, check these hoses. There are also 2 flexible hoses from the rear of the steel pipes to the trans, if the mess is at the front these are probably ok.
#11
Thanks for the reply. It was the clamps on the re-made flexible hose part. I am now very confused on what about my transmission lines was "re-made", since to me it just looks like the original rubber hoses where chopped of and new common hoses fitted.
At any rate it seems like the clamps are made out of goo. Does anyone know of clamps that are not garbage?
Thanks
At any rate it seems like the clamps are made out of goo. Does anyone know of clamps that are not garbage?
Thanks
#12
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Lots of junky clamps out there.
Not quite sure what you mean by "made of goo", though.
Anyhow....
Lowes and Home Depot carry some decent stainless steel clamps that are better then what most auto parts stores are selling these days.
"Jubilee" brand stainless clamps are very rugged. XKs Unlimited has them....or they did years ago.
Oetiker clamps are good as well. These are a crimp-on clamp. Just Google it; you'll see.
Cheers
DD
#14
Lots of junky clamps out there.
Not quite sure what you mean by "made of goo", though.
Anyhow....
Lowes and Home Depot carry some decent stainless steel clamps that are better then what most auto parts stores are selling these days.
"Jubilee" brand stainless clamps are very rugged. XKs Unlimited has them....or they did years ago.
Oetiker clamps are good as well. These are a crimp-on clamp. Just Google it; you'll see.
Cheers
DD
Not quite sure what you mean by "made of goo", though.
Anyhow....
Lowes and Home Depot carry some decent stainless steel clamps that are better then what most auto parts stores are selling these days.
"Jubilee" brand stainless clamps are very rugged. XKs Unlimited has them....or they did years ago.
Oetiker clamps are good as well. These are a crimp-on clamp. Just Google it; you'll see.
Cheers
DD
I have been lurking around other car forums and it looks like ABA Swedish clamps are one of the most trusted ones out there. I am getting some of those
#15
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