It seems to quiet down when the engine gets warmer.
Pontiac Q&AAsk Your Question
1993 Pontiac Grand Am Question: why do I hear a rattle or vibration from the engine area when cranked cold?
Answer #1pushrod November 18, 2012, 19:50Master
What engine? That is alwsys good to know!
Replyburger37, November 19, 2012, 07:07Rookie
Quad 4 four cylinder. I think it could be bad motor mounts since it quiets down after engine gets warmed up good. Does anyone agree?
Replypushrod, November 19, 2012, 07:29Master
Two things i suggest, listen under hood as soon as engine is started cold, timing chains make noise
when cold due to worn componets. Also check cat converter for defective catalyst, may not rattle when warmed up.
Motor mounts could be worn as well. But i am just guessing on all of this.
your.mechanic November 18, 2012, 19:52Master
something is probably loose...whatever size engine you have
Replypushrod, November 18, 2012, 20:00Master
Yea i bet something is loose, but a quad 4 has a few things i may be able to help with.
Answer #3Greg's Orange Auto (10940 Answers) , Orange, CA - (714) 482-6185globalhelper November 19, 2012, 07:06Master
seek a diag and est from your mech as i would only be guessing
Answer #4ziptie12 November 21, 2012, 06:58Master
Does the engine run rough on start-up? Is it a rattle or a vibration , that concerns you most? How does it change when you put it in gear? --When cold , then when warmed up? ..... More than one problem.......
Replypushrod, November 21, 2012, 07:26Master
Hi zip i have a problem i will post the question think about it and see what you think 02 Civic sedan 1.7.
Replyziptie12, November 21, 2012, 17:51Master
Hope the response helped , I replied before I saw this response>........never mind!
Answer #5goodguy July 27, 2013, 18:09Master
quad 4s were always bad for timing chain noise