|
|
|
I recently purchased a '93 240 w/165k on the clock. Body is quite straight and rust-free, especially for the salty NE roads, with new Michelins and exhaust system. Reported to have a clutch cable issue and needed a hood cable. Clutch cable turned into a $700 tranny rebuild, so now I've got about $2,600 tied up in this thing. I've driven it about 1,500 miles since the rebuild (0 prior, as it would not go into 1st or 2nd). Yesterday I changed the motor mounts. They weren't that bad but what I did find was that the "weight" at the end of the clutch cable where it attaches to the fork was installed backwards and was striking the firewall under acceleration. Down off the jacks and onto the road - NO NOISE!! Went to fill up with gas and upon restart, heard a slight rapping on acceleration. By the time I got it home (6 miles), it now sounds like a diesel when increasing or decreasing the revs as well as under load, even the AC compressor. So my shadetree diagnosis is a spun rod bearing. Am I right? I probably did get on it a little in 1st gear on the way to the gas station, but nothing ridiculous.
Fix it? How much?
Replace engine with junkyard pull?
Junk it?
Thanks for your help!
|
|
-
|
|
|
Thought I had spun a rod bearing for a while, turned out that a bolt had fallen out of the rear oil seal into the bellhousing and was flapping around and grinding against the torque converter.
|
|
-
|
|
My gut feeling is that you haven't spun a rod bearing. just doesn't sound quite like a spun rod bearing to me. When my PV's motor spun a rod bearing, the sound would come and go, be markedly louder in some running situations than others, and sometimes be entirely silent.
Easy to verify, though. Just drain the oil. If it is a spun rod bearing there should be an ample amount of metal confetti in the oil pan. No confetti, no spun bearing.
Could be something like a sticky valve? Leaking exhaust manifold gasket?
--
'63 PV544 rat rod, '93 Classic #1141 245 +t
|
|
-
|
|
|
If your engine was not run out of oil and if the oil pump did not fail I would doubt very much if you have a spun bearing.
When the car is running is oil slung out of the filler cap opening when the cap is removed momentarily? If so you are pumping oil and once again I would say the chances of a spun bearing are slim to none.
Randy
|
|
-
|
|
My first 240 developed what sounded like a lound knock on acceleration.
It got louder fairly quickly - after driving it 10 miles home it was significantly worse. Next I drove it gently to our preferred shop and it worsened on that 2 mile drive.
We eventually found a head gasket leak from cyl #1 to cyl #2. They are separated by less than 1/4 inch if I recall and the gasket blew out where they were close. There were no fluid leaks as the gasket failure did not border any fluid passages. Just the knock when combustion pressure would force against the wrong pistons.
I would think a compression test would show at least one bad cyl. if that is your situation. Exact test results would vary depending on what the neighboring piston and valves are doing.
--
Sven: '89 245 NA, 951 ECU, open-front airbox, E-fan, 205/65-15's, IPD sways, E-Codes, amber front corner reflectors, quad horns, tach, small clock. Wifemobile '89 245 NA stock. 90 244 NA spare, runs.
|
|
-
|
|
|
This seems much more mechanical. I put a socket wrench on the crank and you can feel a definite "clunk" at certain points through the crank rotation. One theory is a broken piston.
I found an engine out of a 1989 240 with 105k miles for $300 and a 60 day warranty. I'm leaning in that direction.
|
|
-
|
|
|
Yikes. Definitely something wrong there.
I'd say take the head off after a compression test and see what there is to see. And see scorron's post re. a loose nut/bolt in the bell housing. Would be a shame to spend time and money and then see a part drop out of there when swapping engines.
--
Sven: '89 245 NA, 951 ECU, open-front airbox, E-fan, 205/65-15's, IPD sways, E-Codes, amber front corner reflectors, quad horns, tach, small clock. Wifemobile '89 245 NA stock. 90 244 NA spare, runs.
|
|
-
|
|
|
And now the rest of the story...
Well, not a rod bearing and not a broken piston. It seems that shortly before I took possession of this wonderful machine, the clutch must have been replaced. They did a mighty fine job, right down to resurfacing the flywheel. Only problem was, someone neglected to use thread lock and/or didn't torque down the flywheel bolts. The flywheel was wobbling around like a drunken sailor!
Thanks to the fine folks at Concord Motorsports in Chichester, NH for a quick resolution to the problem!
|
|
-
|
|
|
Now that is one "unique" fault! If you know what shop did the original clutch job, consider letting us know their name!
OUCH!
jorrell
--
92 245 250K miles, IPD'd to the hilt, 06 XC70, 00 Eclipse custom Turbo setup...currently taking names and kicking reputations!
|
|
|
|
|
