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#1 |
"I have a dream"
Join Date: Jun 2005
Location: Louisville
Posts: 90
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hard thump
when i am at a complete stop or slow roll and then floor it i hear and feel a loud thump. sounds like its coming from the rear. ive noticed it for awhile but now its getting louder and i can feel it more. doesnt sound good at all. im thinking maybe its a worn mount bushing but could it be in the rear end?
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#2 |
"I have a dream"
Join Date: Jun 2005
Location: Louisville
Posts: 90
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Re: hard thump
i have another question...why am i smelling coolant when i turn the heat on? i checked the overflow and radiator and they are just as full as always. my windows seem to fog up easier too. could the heating core have a very slow leak?
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#3 |
F-Body Member
Join Date: May 2002
Posts: 6
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Re: hard thump
Question 1-Transmission mount. Question 2-Heater core leaking. Tranny mount is MUCH easier.
jms |
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#4 | |
Bad luck or no luck
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Re: hard thump
Quote:
__________________
87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#5 |
"I have a dream"
Join Date: Jun 2005
Location: Louisville
Posts: 90
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Re: hard thump
that sucks
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#6 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
I third the diagnosis.... tranny mount is EASY.... heater core... NOT SO EASY.. lol
__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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#7 | |
Mile High Thirdgens.
Join Date: May 2004
Location: Thornton,Co
Posts: 150
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Re: hard thump
Quote:
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#8 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
Yeah, I just did a heatercore. I got one at autozone. It was about $15.00. It was a pain, but not as hard as I thought. (the hardest part, is trying to get the two heater tubes lined up so they will go through the firewall). Helps with someone under the hood telling you how lined up you are. Becareful no to bend the tubes, the solder joints crack easy! I had to return one core because I tried to bent it just a little. Shoud be able to get a nice Poly Trans Mount pretty cheap also. I think around $25.00 if I am not mistaking.
Later dude Mike |
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#9 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
How did you get to the heater core Mike?
__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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#10 |
Bad luck or no luck
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Re: hard thump
definitely go with a poly tranny mount, i got one from summit for around 22 bucks, just as cheap as a rubber one from advance or autozone.
__________________
87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#11 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
Hey Nathan, its been a few months since I did the job. It was definitely not as hard as I had heard, especially from some of the articles I have read. They were pretty scary LOL. Alot of people say you need to pull the dash. All I did (trying to remember) is removed the lower dash panel on the passenger side (the one that says "performance Suspension") and the one below it (the one that the lower interior light bulb plugs into). Then take a look at it, you should see the black plastic heater core cover. (it has I believe five 7mm screws holding it on.) (3 lower easy ones, and two upper harder ones to get to). Have the door wide open, and put be prepared to be in an uncomfortable position for a little bit. You will see the linkage for the duct work (you won't need to touch this) pull the cover off. I forgot, don't forget the two hoses on the firewall that go to the core under the hood. Disconnect them. I believe it is alot easier if you move the ignition coil out of the way, etc. This was a pain in the arse to get to (the hose clamps) because of the position they were in. Once they are disconnected, you should be able to wiggle the core out pretty easy. The hardest part of this job (at least for me), was getting to the clamps, and feeding the tubes from the new core through the firewall (without bending them) get help if you can (another set of eyes under the hood) this helps! Once youy get it in, hook up your hoses & clamps, put the cover back on, and panels. I left everything off for a day, just to make sure the new heater core wasn't defective. It took me about an hour complete (not including the trip to get another core since I bent the tubes on the first one and cracked the solder joint. Hope this helps man. If I can help you in any way man let me know.
Later Mike |
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#12 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
wow... I have two questions... Did you take the passenger seat out? And how many hours total did it take you?
As for getting the hoses off.. they are laready off, I bypassed the heater core a couple years ago.
__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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#13 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
Hey man, no I did not pull the seat out. I did have it in the furthest back position. It took me about an hour (maybe a little longer total.) On my knees and side most of the time. It really isn't to bad. Man, if you were here, I would help you. When it first started leaking, and I read up on changing it, hearing how difficult it was. I was like "man, I will just bypass this" Then I said the hell with that, I started pulling it apart and it wasn't too bad at all. Hell, I was so worried about doing the job, that I had arrangements for the Wife to take me to work until I got the job done. And I ended up getting it done in about an Hour- an hour and a half. (she was even surprised) Even though I am in Florida it does get cold in the winter and I didn't want to be without heat. Especially driving my oldest Daughter to school in the mornings. Believe it or not, we do see temps in the 30's in the Sunshine State. LOL Man Bro, you are half way there (you already have the hoses disconnected)
Later man Mike |
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#14 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
Wow... everyone I talk to says ayt least 7 hours!! Damn man... wanna take a road trip to Niagara Falls?? Good scenery there
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__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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#15 |
"I have a dream"
Join Date: Jun 2005
Location: Louisville
Posts: 90
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Re: hard thump
right now im only smelling it and dont see a difference in coolant level. could it possibly blow in the car and cause a big mess? i had one do that on my grand am but it leaked outside the car. im going to stop driving it if im risking leakage in the car. could this leak be y my windows fog up?
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#16 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
LOL Nathan. I wish I had the time to take off. I would love to come to Niagra Falls. Without the barrel though!
![]() ![]() Later Mike |
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#17 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
Hey adonis710, this CAN make a mess on your passenger side floor. It might cause some fogging on your front passenger side windshield. Just for the hell of it man, check the connections under the hood and make sure your clamps are good and tight (going to the core). Because you can have a pin-hole leak from the hose shooting up against the firewall and into the car. Hell it is worth a shot and checking.
Later Mike |
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#18 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
put it this way... i could have bathed in antifreeze on the passenger side floor when my core blew
![]() Mike... addme to MSN if ya got it... rjbanchard@hotmail.com
__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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#19 |
Registered User
Join Date: Aug 2005
Location: New Port Richey, Florida
Posts: 419
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Re: hard thump
Hey Nathan, I am going to have the wife add you to my MSN. Hell, i don't know how to do it. Hey is that Hotmail addy you gave me the correct one? Or is it missing an "L" in Blanchard?? Or is it rjbanchard@hotmail.com Soon as I find out, I will add you on.
Later Mike |
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#20 |
GTA Member
Join Date: Oct 2001
Location: North York, ON Canada (Toronto)
Posts: 870
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Re: hard thump
lol... it is rjblanchard@hotmail.com
__________________
Best Track Time is 14.396 @ 95.71MPH 225.5hp @ 4250rpm (at the wheels) 325.8ft-lbs @ 3250rpm (at the wheels) |
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